release: OpenCV 4.0.0-alpha (version++)

Merge pull request #12585 from alalek:move_cuda_modules
cuda: move CUDA modules to opencv_contrib: https://github.com/opencv/opencv_contrib/pull/1781
2026-07-22 20:03:03 +04:00 · 2018-09-19 19:30:30 +03:00 · 2018-09-19 19:30:02 +03:00 · 2018-09-19 18:57:00 +03:00 · 2018-09-19 15:49:47 +00:00 · 2018-09-19 15:07:58 +00:00
863 changed files with 8767 additions and 127864 deletions
@@ -2,6 +2,14 @@
 If you have a question rather than reporting a bug please go to http://answers.opencv.org where you get much faster responses.
 If you need further assistance please read [How To Contribute](https://github.com/opencv/opencv/wiki/How_to_contribute).

+Please:
+
+* Read the documentation to test with the latest developer build.
+* Check if other person has already created the same issue to avoid duplicates. You can comment on it if there already is an issue.
+* Try to be as detailed as possible in your report.
+* Report only one problem per created issue.
+
+
 This is a template helping you to create an issue which can be processed as quickly as possible. This is the bug reporting section for the OpenCV library.
 -->

@@ -27,4 +35,4 @@ This is a template helping you to create an issue which can be processed as quic
    // C++ code example
    ```
 or attach as .txt or .zip file
-->
+-->
@@ -1,9 +1,9 @@
-# Binaries branch name: ffmpeg/3.4_20180608
-# Binaries were created for OpenCV: f5ddbbf65937d8f44e481e4ee1082961821f5c62
-ocv_update(FFMPEG_BINARIES_COMMIT "8041bd6f5ad37045c258904ba3030bb3442e3911")
-ocv_update(FFMPEG_FILE_HASH_BIN32 "fa5a2a4e2f37defcb95bde8ed145c2b3")
-ocv_update(FFMPEG_FILE_HASH_BIN64 "2cc08fc4fef8199fe80e0f126684834f")
-ocv_update(FFMPEG_FILE_HASH_CMAKE "3b90f67f4b429e77d3da36698cef700c")
+# Binaries branch name: ffmpeg/master_20180918
+# Binaries were created for OpenCV: e628fd7bce2b5d64c36b5bdc55a37c0ae78bc907
+ocv_update(FFMPEG_BINARIES_COMMIT "c88df798e9dc3d63840f913714563a730245464a")
+ocv_update(FFMPEG_FILE_HASH_BIN32 "48c95ce37d5aa6b15b3ad116e331ebc1")
+ocv_update(FFMPEG_FILE_HASH_BIN64 "d33eca57ae1cfd6287b975b98125f7a3")
+ocv_update(FFMPEG_FILE_HASH_CMAKE "5fd49e1b84e9f402ca155e27c92d2ce9")

 function(download_win_ffmpeg script_var)
  set(${script_var} "" PARENT_SCOPE)
@@ -431,7 +431,7 @@ int ovx_hal_warpAffine(int atype, const uchar *a, size_t astep, int aw, int ah,
    return CV_HAL_ERROR_OK;
 }

-int ovx_hal_warpPerspectve(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[9], int interpolation, int borderType, const double borderValue[4])
+int ovx_hal_warpPerspective(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[9], int interpolation, int borderType, const double borderValue[4])
 {
    if (skipSmallImages<VX_KERNEL_WARP_PERSPECTIVE>(aw, ah))
        return CV_HAL_ERROR_NOT_IMPLEMENTED;
@@ -27,7 +27,7 @@ int ovx_hal_mul(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t
 int ovx_hal_merge8u(const uchar **src_data, uchar *dst_data, int len, int cn);
 int ovx_hal_resize(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, double inv_scale_x, double inv_scale_y, int interpolation);
 int ovx_hal_warpAffine(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[6], int interpolation, int borderType, const double borderValue[4]);
-int ovx_hal_warpPerspectve(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[9], int interpolation, int borderType, const double borderValue[4]);
+int ovx_hal_warpPerspective(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[9], int interpolation, int borderType, const double borderValue[4]);

 struct cvhalFilter2D;
 int ovx_hal_filterInit(cvhalFilter2D **filter_context, uchar *kernel_data, size_t kernel_step, int kernel_type, int kernel_width, int kernel_height,
@@ -97,7 +97,7 @@ int ovx_hal_integral(int depth, int sdepth, int, const uchar * a, size_t astep,
 //#undef cv_hal_warpAffine
 //#define cv_hal_warpAffine ovx_hal_warpAffine
 //#undef cv_hal_warpPerspective
-//#define cv_hal_warpPerspective ovx_hal_warpPerspectve
+//#define cv_hal_warpPerspective ovx_hal_warpPerspective

 #undef cv_hal_filterInit
 #define cv_hal_filterInit ovx_hal_filterInit
@@ -149,7 +149,6 @@ endif()
 # ----------------------------------------------------------------------------
 # Detect compiler and target platform architecture
 # ----------------------------------------------------------------------------
-OCV_OPTION(ENABLE_CXX11 "Enable C++11 compilation mode" "${OPENCV_CXX11}")
 include(cmake/OpenCVDetectCXXCompiler.cmake)
 ocv_cmake_hook(POST_DETECT_COMPILER)

@@ -253,8 +252,8 @@ OCV_OPTION(WITH_WIN32UI        "Build with Win32 UI Backend support"         ON
 OCV_OPTION(WITH_QUICKTIME      "Use QuickTime for Video I/O"                 OFF  IF APPLE )
 OCV_OPTION(WITH_QTKIT          "Use QTKit Video I/O backend"                 OFF  IF APPLE )
 OCV_OPTION(WITH_TBB            "Include Intel TBB support"                   OFF  IF (NOT IOS AND NOT WINRT) )
+OCV_OPTION(WITH_HPX            "Include Ste||ar Group HPX support"           OFF)
 OCV_OPTION(WITH_OPENMP         "Include OpenMP support"                      OFF)
-OCV_OPTION(WITH_CSTRIPES       "Include C= support"                          OFF  IF (WIN32 AND NOT WINRT)  )
 OCV_OPTION(WITH_PTHREADS_PF    "Use pthreads-based parallel_for"             ON   IF (NOT WIN32 OR MINGW) )
 OCV_OPTION(WITH_TIFF           "Include TIFF support"                        ON   IF (NOT IOS) )
 OCV_OPTION(WITH_UNICAP         "Include Unicap support (GPL)"                OFF  IF (UNIX AND NOT APPLE AND NOT ANDROID) )
@@ -271,6 +270,7 @@ OCV_OPTION(WITH_OPENCLAMDFFT   "Include AMD OpenCL FFT library support"      ON
 OCV_OPTION(WITH_OPENCLAMDBLAS  "Include AMD OpenCL BLAS library support"     ON   IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
 OCV_OPTION(WITH_DIRECTX        "Include DirectX support"                     ON   IF (WIN32 AND NOT WINRT) )
 OCV_OPTION(WITH_INTELPERC      "Include Intel Perceptual Computing support"  OFF  IF (WIN32 AND NOT WINRT) )
+OCV_OPTION(WITH_LIBREALSENSE   "Include Intel librealsense support"          OFF  IF (NOT WITH_INTELPERC) )
 OCV_OPTION(WITH_VA             "Include VA support"                          OFF  IF (UNIX AND NOT ANDROID) )
 OCV_OPTION(WITH_VA_INTEL       "Include Intel VA-API/OpenCL support"         OFF  IF (UNIX AND NOT ANDROID) )
 OCV_OPTION(WITH_MFX            "Include Intel Media SDK support"             OFF   IF ((UNIX AND NOT ANDROID) OR (WIN32 AND NOT WINRT AND NOT MINGW)) )
@@ -282,6 +282,7 @@ OCV_OPTION(WITH_PROTOBUF       "Enable libprotobuf"                          ON
 OCV_OPTION(WITH_IMGCODEC_HDR   "Include HDR support"                         ON)
 OCV_OPTION(WITH_IMGCODEC_SUNRASTER "Include SUNRASTER support"               ON)
 OCV_OPTION(WITH_IMGCODEC_PXM   "Include PNM (PBM,PGM,PPM) and PAM formats support" ON)
+OCV_OPTION(WITH_IMGCODEC_PFM   "Include PFM formats support"                 ON)

 # OpenCV build components
 # ===================================================
@@ -372,8 +373,6 @@ endif()

 if(ANDROID OR WIN32)
  ocv_update(OPENCV_DOC_INSTALL_PATH doc)
-else()
-  ocv_update(OPENCV_DOC_INSTALL_PATH share/OpenCV/doc)
 endif()

 if(WIN32 AND CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
@@ -413,8 +412,6 @@ if(ANDROID)
  ocv_update(OPENCV_TEST_DATA_INSTALL_PATH "sdk/etc/testdata")
 elseif(WIN32)
  ocv_update(OPENCV_TEST_DATA_INSTALL_PATH "testdata")
-else()
-  ocv_update(OPENCV_TEST_DATA_INSTALL_PATH "share/OpenCV/testdata")
 endif()

 if(ANDROID)
@@ -427,6 +424,7 @@ if(ANDROID)
  ocv_update(OPENCV_INCLUDE_INSTALL_PATH sdk/native/jni/include)
  ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH samples/native)
  ocv_update(OPENCV_OTHER_INSTALL_PATH   sdk/etc)
+  ocv_update(OPENCV_LICENSES_INSTALL_PATH "${OPENCV_OTHER_INSTALL_PATH}/licenses")
 else()
  set(LIBRARY_OUTPUT_PATH                "${OpenCV_BINARY_DIR}/lib")
  ocv_update(3P_LIBRARY_OUTPUT_PATH      "${OpenCV_BINARY_DIR}/3rdparty/lib${LIB_SUFFIX}")
@@ -442,42 +440,40 @@ else()
    ocv_update(OPENCV_JAR_INSTALL_PATH java)
    ocv_update(OPENCV_OTHER_INSTALL_PATH   etc)
    ocv_update(OPENCV_CONFIG_INSTALL_PATH  ".")
+    ocv_update(OPENCV_INCLUDE_INSTALL_PATH "include")
+    ocv_update(OPENCV_LICENSES_INSTALL_PATH "${OPENCV_OTHER_INSTALL_PATH}/licenses")
  else()
+    # Note: layout differs from OpenCV 3.4
    include(GNUInstallDirs)
-    ocv_update(OPENCV_LIB_INSTALL_PATH     ${CMAKE_INSTALL_LIBDIR}${LIB_SUFFIX})
-    ocv_update(OPENCV_3P_LIB_INSTALL_PATH  share/OpenCV/3rdparty/${OPENCV_LIB_INSTALL_PATH})
-    ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH    share/OpenCV/samples)
-    ocv_update(OPENCV_JAR_INSTALL_PATH share/OpenCV/java)
-    ocv_update(OPENCV_OTHER_INSTALL_PATH   share/OpenCV)
-
-    if(NOT DEFINED OPENCV_CONFIG_INSTALL_PATH)
-      math(EXPR SIZEOF_VOID_P_BITS "8 * ${CMAKE_SIZEOF_VOID_P}")
-      if(LIB_SUFFIX AND NOT SIZEOF_VOID_P_BITS EQUAL LIB_SUFFIX)
-        ocv_update(OPENCV_CONFIG_INSTALL_PATH ${CMAKE_INSTALL_LIBDIR}${LIB_SUFFIX}/cmake/opencv)
-      else()
-        ocv_update(OPENCV_CONFIG_INSTALL_PATH share/OpenCV)
-      endif()
-    endif()
+    ocv_update(OPENCV_INCLUDE_INSTALL_PATH       "${CMAKE_INSTALL_INCLUDEDIR}/opencv4")
+    ocv_update(OPENCV_LIB_INSTALL_PATH           "${CMAKE_INSTALL_LIBDIR}${LIB_SUFFIX}")
+    ocv_update(OPENCV_CONFIG_INSTALL_PATH        "${OPENCV_LIB_INSTALL_PATH}/cmake/opencv4")
+    ocv_update(OPENCV_3P_LIB_INSTALL_PATH        "${OPENCV_LIB_INSTALL_PATH}/opencv4/3rdparty")
+    ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH   "${CMAKE_INSTALL_DATAROOTDIR}/opencv4/samples")
+    ocv_update(OPENCV_DOC_INSTALL_PATH           "${CMAKE_INSTALL_DATAROOTDIR}/doc/opencv4")
+    ocv_update(OPENCV_JAR_INSTALL_PATH           "${CMAKE_INSTALL_DATAROOTDIR}/java/opencv4")
+    ocv_update(OPENCV_TEST_DATA_INSTALL_PATH     "${CMAKE_INSTALL_DATAROOTDIR}/opencv4/testdata")
+    ocv_update(OPENCV_OTHER_INSTALL_PATH         "${CMAKE_INSTALL_DATAROOTDIR}/opencv4")
+    ocv_update(OPENCV_LICENSES_INSTALL_PATH      "${CMAKE_INSTALL_DATAROOTDIR}/licenses/opencv4")
  endif()
-  ocv_update(OPENCV_INCLUDE_INSTALL_PATH "include")
 endif()

 ocv_update(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${OPENCV_LIB_INSTALL_PATH}")
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

 if(INSTALL_TO_MANGLED_PATHS)
-  set(OPENCV_INCLUDE_INSTALL_PATH ${OPENCV_INCLUDE_INSTALL_PATH}/opencv-${OPENCV_VERSION})
  foreach(v
+      OPENCV_INCLUDE_INSTALL_PATH
+      # file names include version (.so/.dll): OPENCV_LIB_INSTALL_PATH
+      OPENCV_CONFIG_INSTALL_PATH
      OPENCV_3P_LIB_INSTALL_PATH
      OPENCV_SAMPLES_SRC_INSTALL_PATH
-      OPENCV_CONFIG_INSTALL_PATH
      OPENCV_DOC_INSTALL_PATH
-      OPENCV_JAR_INSTALL_PATH
+      # JAR file name includes version: OPENCV_JAR_INSTALL_PATH
      OPENCV_TEST_DATA_INSTALL_PATH
      OPENCV_OTHER_INSTALL_PATH
    )
-    string(REPLACE "OpenCV" "OpenCV-${OPENCV_VERSION}" ${v} "${${v}}")
-    string(REPLACE "opencv" "opencv-${OPENCV_VERSION}" ${v} "${${v}}")
+    string(REGEX REPLACE "opencv[0-9]*" "opencv-${OPENCV_VERSION}" ${v} "${${v}}")
  endforeach()
 endif()

@@ -1009,9 +1005,6 @@ string(STRIP "${OPENCV_COMPILER_STR}" OPENCV_COMPILER_STR)
 status("")
 status("  C/C++:")
 status("    Built as dynamic libs?:" BUILD_SHARED_LIBS THEN YES ELSE NO)
-if(ENABLE_CXX11 OR HAVE_CXX11)
-status("    C++11:" HAVE_CXX11 THEN YES ELSE NO)
-endif()
 status("    C++ Compiler:"           ${OPENCV_COMPILER_STR})
 status("    C++ flags (Release):"    ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE})
 status("    C++ flags (Debug):"      ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG})
@@ -1225,6 +1218,10 @@ if(WITH_IMGCODEC_PXM OR DEFINED HAVE_IMGCODEC_PXM)
  status("    PXM:" HAVE_IMGCODEC_PXM THEN "YES" ELSE "NO")
 endif()

+if(WITH_IMGCODEC_PFM OR DEFINED HAVE_IMGCODEC_PFM)
+  status("    PFM:" HAVE_IMGCODEC_PFM THEN "YES" ELSE "NO")
+endif()
+
 # ========================== VIDEO IO ==========================
 status("")
 status("  Video I/O:")
@@ -1346,7 +1343,7 @@ endif()
 # Order is similar to CV_PARALLEL_FRAMEWORK in core/src/parallel.cpp
 ocv_build_features_string(parallel_status EXCLUSIVE
  IF HAVE_TBB THEN "TBB (ver ${TBB_VERSION_MAJOR}.${TBB_VERSION_MINOR} interface ${TBB_INTERFACE_VERSION})"
-  IF HAVE_CSTRIPES THEN "C="
+  IF HAVE_HPX THEN "HPX"
  IF HAVE_OPENMP THEN "OpenMP"
  IF HAVE_GCD THEN "GCD"
  IF WINRT OR HAVE_CONCURRENCY THEN "Concurrency"
@@ -2,8 +2,8 @@

 ### Resources

-* Homepage: <http://opencv.org>
-* Docs: <http://docs.opencv.org/master/>
+* Homepage: <https://opencv.org>
+* Docs: <https://docs.opencv.org/master/>
 * Q&A forum: <http://answers.opencv.org>
 * Issue tracking: <https://github.com/opencv/opencv/issues>

@@ -30,7 +30,6 @@ using cv::ParallelLoopBody;
 #include "boost.h"
 #include "cascadeclassifier.h"
 #include <queue>
-#include "cxmisc.h"

 #include "cvconfig.h"

@@ -2033,7 +2033,8 @@ typedef CvANN_MLP NeuralNet_MLP;
 typedef CvGBTreesParams GradientBoostingTreeParams;
 typedef CvGBTrees GradientBoostingTrees;

-template<> void DefaultDeleter<CvDTreeSplit>::operator ()(CvDTreeSplit* obj) const;
+template<> struct DefaultDeleter<CvDTreeSplit>{ void operator ()(CvDTreeSplit* obj) const; };
+
 }

 #endif // __cplusplus
@@ -1880,10 +1880,7 @@ double CvDTree::calc_node_dir( CvDTreeNode* node )
 namespace cv
 {

-template<> void DefaultDeleter<CvDTreeSplit>::operator ()(CvDTreeSplit* obj) const
-{
-    fastFree(obj);
-}
+void DefaultDeleter<CvDTreeSplit>::operator ()(CvDTreeSplit* obj) const { fastFree(obj); }

 DTreeBestSplitFinder::DTreeBestSplitFinder( CvDTree* _tree, CvDTreeNode* _node)
 {
@@ -1,11 +0,0 @@
-if(WIN32)
-    find_path( CSTRIPES_LIB_DIR
-               NAMES "C=.lib"
-               DOC "The path to C= lib and dll")
-    if(CSTRIPES_LIB_DIR)
-        ocv_include_directories("${CSTRIPES_LIB_DIR}/..")
-        link_directories("${CSTRIPES_LIB_DIR}")
-        set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} "C=")
-        set(HAVE_CSTRIPES 1)
-    endif()
-endif()
@@ -70,6 +70,12 @@ if(CUDA_FOUND)
    unset(CUDA_ARCH_PTX CACHE)
  endif()

+  SET(DETECT_ARCHS_COMMAND "${CUDA_NVCC_EXECUTABLE}" ${CUDA_NVCC_FLAGS} "${OpenCV_SOURCE_DIR}/cmake/checks/OpenCVDetectCudaArch.cu" "--run")
+  if(WIN32 AND CMAKE_LINKER) #Workaround for VS cl.exe not being in the env. path
+    get_filename_component(host_compiler_bindir ${CMAKE_LINKER} DIRECTORY)
+    SET(DETECT_ARCHS_COMMAND ${DETECT_ARCHS_COMMAND} "-ccbin" "${host_compiler_bindir}")
+  endif()
+
  set(__cuda_arch_ptx "")
  if(CUDA_GENERATION STREQUAL "Fermi")
    set(__cuda_arch_bin "2.0")
@@ -82,10 +88,11 @@ if(CUDA_FOUND)
  elseif(CUDA_GENERATION STREQUAL "Volta")
    set(__cuda_arch_bin "7.0")
  elseif(CUDA_GENERATION STREQUAL "Auto")
-    execute_process( COMMAND "${CUDA_NVCC_EXECUTABLE}" ${CUDA_NVCC_FLAGS} "${OpenCV_SOURCE_DIR}/cmake/checks/OpenCVDetectCudaArch.cu" "--run"
+    execute_process( COMMAND ${DETECT_ARCHS_COMMAND}
                     WORKING_DIRECTORY "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/"
                     RESULT_VARIABLE _nvcc_res OUTPUT_VARIABLE _nvcc_out
                     ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+    string(REGEX REPLACE ".*\n" "" _nvcc_out "${_nvcc_out}") #Strip leading warning messages, if any
    if(NOT _nvcc_res EQUAL 0)
      message(STATUS "Automatic detection of CUDA generation failed. Going to build for all known architectures.")
    else()
@@ -99,10 +106,11 @@ if(CUDA_FOUND)
      set(__cuda_arch_bin "3.2")
      set(__cuda_arch_ptx "")
    elseif(AARCH64)
-      execute_process( COMMAND "${CUDA_NVCC_EXECUTABLE}" ${CUDA_NVCC_FLAGS} "${OpenCV_SOURCE_DIR}/cmake/checks/OpenCVDetectCudaArch.cu" "--run"
+      execute_process( COMMAND ${DETECT_ARCHS_COMMAND}
                       WORKING_DIRECTORY "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/"
                       RESULT_VARIABLE _nvcc_res OUTPUT_VARIABLE _nvcc_out
                       ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+      string(REGEX REPLACE ".*\n" "" _nvcc_out "${_nvcc_out}") #Strip leading warning messages, if any
      if(NOT _nvcc_res EQUAL 0)
        message(STATUS "Automatic detection of CUDA generation failed. Going to build for all known architectures.")
        set(__cuda_arch_bin "5.3 6.2 7.0")
@@ -240,7 +248,7 @@ if(CUDA_FOUND)
    endif()

    if(UNIX OR APPLE)
-      set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fPIC)
+      set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fPIC --std=c++11)
    endif()
    if(APPLE)
      set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} -Xcompiler -fno-finite-math-only)
@@ -166,14 +166,11 @@ if(CMAKE_VERSION VERSION_LESS "3.1")
  endforeach()
 endif()

-if(ENABLE_CXX11)
-  #cmake_minimum_required(VERSION 3.1.0 FATAL_ERROR)
-  set(CMAKE_CXX_STANDARD 11)
-  set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
-  set(CMAKE_CXX_EXTENSIONS OFF) # use -std=c++11 instead of -std=gnu++11
-  if(CMAKE_CXX11_COMPILE_FEATURES)
-    set(HAVE_CXX11 ON)
-  endif()
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
+set(CMAKE_CXX_EXTENSIONS OFF) # use -std=c++11 instead of -std=gnu++11
+if(CMAKE_CXX11_COMPILE_FEATURES)
+  set(HAVE_CXX11 ON)
 endif()
 if(NOT HAVE_CXX11)
  ocv_check_compiler_flag(CXX "" HAVE_CXX11 "${OpenCV_SOURCE_DIR}/cmake/checks/cxx11.cpp")
@@ -185,3 +182,6 @@ if(NOT HAVE_CXX11)
    endif()
  endif()
 endif()
+if(NOT HAVE_CXX11)
+  message(FATAL_ERROR "OpenCV 4.x requires C++11")
+endif()
@@ -52,5 +52,18 @@ if(HAVE_QT AND ${VTK_VERSION} VERSION_GREATER "6.0.0" AND NOT ${VTK_QT_VERSION}
  endif()
 endif()

+try_compile(VTK_COMPILE_STATUS
+    "${OpenCV_BINARY_DIR}"
+    "${OpenCV_SOURCE_DIR}/cmake/checks/vtk_test.cpp"
+    CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${VTK_INCLUDE_DIRS}"
+    LINK_LIBRARIES ${VTK_LIBRARIES}
+    OUTPUT_VARIABLE OUTPUT
+)
+
+if(NOT ${VTK_COMPILE_STATUS})
+  message(STATUS "VTK support is disabled. Compilation of the sample code has failed.")
+  return()
+endif()
+
 set(HAVE_VTK ON)
 message(STATUS "Found VTK ${VTK_VERSION} (${VTK_USE_FILE})")
@@ -0,0 +1,15 @@
+# Main variables:
+# LIBREALSENSE_LIBRARIES and LIBREALSENSE_INCLUDE to link Intel librealsense modules
+# HAVE_LIBREALSENSE for conditional compilation OpenCV with/without librealsense
+
+find_path(LIBREALSENSE_INCLUDE_DIR "librealsense2/rs.hpp" PATHS "$ENV{LIBREALSENSE_INCLUDE}" DOC "Path to librealsense interface headers")
+find_library(LIBREALSENSE_LIBRARIES "realsense2" PATHS "$ENV{LIBREALSENSE_LIB}" DOC "Path to librealsense interface libraries")
+
+if(LIBREALSENSE_INCLUDE_DIR AND LIBREALSENSE_LIBRARIES)
+    set(HAVE_LIBREALSENSE TRUE)
+else()
+    set(HAVE_LIBREALSENSE FALSE)
+    message( WARNING, " librealsense include directory (set by LIBREALSENSE_INCLUDE_DIR variable) is not found or does not have librealsense include files." )
+endif() #if(LIBREALSENSE_INCLUDE_DIR AND LIBREALSENSE_LIBRARIES)
+
+mark_as_advanced(FORCE LIBREALSENSE_LIBRARIES LIBREALSENSE_INCLUDE_DIR)
@@ -268,3 +268,8 @@ if(WITH_IMGCODEC_PXM)
 elseif(DEFINED WITH_IMGCODEC_PXM)
  set(HAVE_IMGCODEC_PXM OFF)
 endif()
+if(WITH_IMGCODEC_PFM)
+  set(HAVE_IMGCODEC_PFM ON)
+elseif(DEFINED WITH_IMGCODEC_PFM)
+  set(HAVE_IMGCODEC_PFM OFF)
+endif()
@@ -7,6 +7,13 @@ if(WITH_TBB)
  include("${OpenCV_SOURCE_DIR}/cmake/OpenCVDetectTBB.cmake")
 endif(WITH_TBB)

+# --- HPX ---
+if(WITH_HPX)
+  find_package(HPX REQUIRED)
+  ocv_include_directories(${HPX_INCLUDE_DIRS})
+  set(HAVE_HPX TRUE)
+endif(WITH_HPX)
+
 # --- IPP ---
 if(WITH_IPP)
  include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindIPP.cmake")
@@ -93,22 +100,15 @@ if(WITH_CLP)
  endif()
 endif(WITH_CLP)

-# --- C= ---
-if(WITH_CSTRIPES AND NOT HAVE_TBB)
-  include("${OpenCV_SOURCE_DIR}/cmake/OpenCVDetectCStripes.cmake")
-else()
-  set(HAVE_CSTRIPES 0)
-endif()
-
 # --- GCD ---
-if(APPLE AND NOT HAVE_TBB AND NOT HAVE_CSTRIPES)
+if(APPLE AND NOT HAVE_TBB)
  set(HAVE_GCD 1)
 else()
  set(HAVE_GCD 0)
 endif()

 # --- Concurrency ---
-if(MSVC AND NOT HAVE_TBB AND NOT HAVE_CSTRIPES)
+if(MSVC AND NOT HAVE_TBB)
  set(_fname "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/concurrencytest.cpp")
  file(WRITE "${_fname}" "#if _MSC_VER < 1600\n#error\n#endif\nint main() { return 0; }\n")
  try_compile(HAVE_CONCURRENCY "${CMAKE_BINARY_DIR}" "${_fname}")
@@ -310,6 +310,11 @@ if(APPLE)
  endif()
 endif(APPLE)

+# --- Intel librealsense ---
+if(WITH_LIBREALSENSE)
+  include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindLibRealsense.cmake")
+endif(WITH_LIBREALSENSE)
+
 # --- Intel Perceptual Computing SDK ---
 if(WITH_INTELPERC)
  include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindIntelPerCSDK.cmake")
@@ -48,7 +48,7 @@ if(ANDROID)
  string(REPLACE "opencv_" "" OPENCV_MODULES_CONFIGMAKE "${OPENCV_MODULES_CONFIGMAKE}")

  if(BUILD_FAT_JAVA_LIB)
-    set(OPENCV_LIBS_CONFIGMAKE java3)
+    set(OPENCV_LIBS_CONFIGMAKE java4)
  else()
    set(OPENCV_LIBS_CONFIGMAKE "${OPENCV_MODULES_CONFIGMAKE}")
  endif()
@@ -33,7 +33,7 @@ endif()
 # -------------------------------------------------------------------------------------------
 #  Part 1/3: ${BIN_DIR}/OpenCVConfig.cmake              -> For use *without* "make install"
 # -------------------------------------------------------------------------------------------
-set(OpenCV_INCLUDE_DIRS_CONFIGCMAKE "\"${OPENCV_CONFIG_FILE_INCLUDE_DIR}\" \"${OpenCV_SOURCE_DIR}/include\" \"${OpenCV_SOURCE_DIR}/include/opencv\"")
+set(OpenCV_INCLUDE_DIRS_CONFIGCMAKE "\"${OPENCV_CONFIG_FILE_INCLUDE_DIR}\" \"${OpenCV_SOURCE_DIR}/include\"")

 foreach(m ${OPENCV_MODULES_BUILD})
  if(EXISTS "${OPENCV_MODULE_${m}_LOCATION}/include")
@@ -68,7 +68,7 @@ configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/OpenCVConfig-version.cmake.
 #  Part 2/3: ${BIN_DIR}/unix-install/OpenCVConfig.cmake -> For use *with* "make install"
 # -------------------------------------------------------------------------------------------
 file(RELATIVE_PATH OpenCV_INSTALL_PATH_RELATIVE_CONFIGCMAKE "${CMAKE_INSTALL_PREFIX}/${OPENCV_CONFIG_INSTALL_PATH}/" ${CMAKE_INSTALL_PREFIX})
-set(OpenCV_INCLUDE_DIRS_CONFIGCMAKE "\"\${OpenCV_INSTALL_PATH}/${OPENCV_INCLUDE_INSTALL_PATH}\" \"\${OpenCV_INSTALL_PATH}/${OPENCV_INCLUDE_INSTALL_PATH}/opencv\"")
+set(OpenCV_INCLUDE_DIRS_CONFIGCMAKE "\"\${OpenCV_INSTALL_PATH}/${OPENCV_INCLUDE_INSTALL_PATH}\"")

 if(USE_IPPICV)
  file(RELATIVE_PATH IPPICV_INSTALL_PATH_RELATIVE_CONFIGCMAKE "${CMAKE_INSTALL_PREFIX}" "${IPPICV_INSTALL_PATH}")
@@ -43,9 +43,9 @@ endmacro()
 if(NOT DEFINED CMAKE_HELPER_SCRIPT)

 if(INSTALL_TO_MANGLED_PATHS)
-  set(OPENCV_PC_FILE_NAME "opencv-${OPENCV_VERSION}.pc")
+  ocv_update(OPENCV_PC_FILE_NAME "opencv-${OPENCV_VERSION}.pc")
 else()
-  set(OPENCV_PC_FILE_NAME opencv.pc)
+  ocv_update(OPENCV_PC_FILE_NAME opencv4.pc)
 endif()

 # build the list of opencv libs and dependencies for all modules
@@ -1,4 +1,4 @@
-set(MIN_VER_CMAKE 2.8.12.2)
+set(MIN_VER_CMAKE 3.5.1)
 set(MIN_VER_CUDA 6.5)
 set(MIN_VER_PYTHON2 2.6)
 set(MIN_VER_PYTHON3 3.2)
@@ -1137,6 +1137,11 @@ function(ocv_add_perf_tests)
      ocv_target_link_libraries(${the_target} LINK_PRIVATE ${perf_deps} ${OPENCV_MODULE_${the_module}_DEPS} ${OPENCV_LINKER_LIBS} ${OPENCV_PERF_${the_module}_DEPS})
      add_dependencies(opencv_perf_tests ${the_target})

+      if(HAVE_HPX)
+        message("Linking HPX to Perf test of module ${name}")
+        ocv_target_link_libraries(${the_target} LINK_PRIVATE "${HPX_LIBRARIES}")
+      endif()
+
      set_target_properties(${the_target} PROPERTIES LABELS "${OPENCV_MODULE_${the_module}_LABEL};PerfTest")
      set_source_files_properties(${OPENCV_PERF_${the_module}_SOURCES} ${${the_target}_pch}
        PROPERTIES LABELS "${OPENCV_MODULE_${the_module}_LABEL};PerfTest")
@@ -1222,6 +1227,11 @@ function(ocv_add_accuracy_tests)
      ocv_target_link_libraries(${the_target} LINK_PRIVATE ${test_deps} ${OPENCV_MODULE_${the_module}_DEPS} ${OPENCV_LINKER_LIBS} ${OPENCV_TEST_${the_module}_DEPS})
      add_dependencies(opencv_tests ${the_target})

+      if(HAVE_HPX)
+        message("Linking HPX to Perf test of module ${name}")
+        ocv_target_link_libraries(${the_target} LINK_PRIVATE "${HPX_LIBRARIES}")
+      endif()
+
      set_target_properties(${the_target} PROPERTIES LABELS "${OPENCV_MODULE_${the_module}_LABEL};AccuracyTest")
      set_source_files_properties(${OPENCV_TEST_${the_module}_SOURCES} ${${the_target}_pch}
        PROPERTIES LABELS "${OPENCV_MODULE_${the_module}_LABEL};AccuracyTest")
@@ -1089,7 +1089,7 @@ function(ocv_install_3rdparty_licenses library)
    get_filename_component(name "${filename}" NAME)
    install(
      FILES "${filename}"
-      DESTINATION "${OPENCV_OTHER_INSTALL_PATH}/licenses"
+      DESTINATION "${OPENCV_LICENSES_INSTALL_PATH}"
      COMPONENT licenses
      RENAME "${library}-${name}"
      OPTIONAL)
@@ -1,14 +1,25 @@
-#include <stdio.h>
+#include <iostream>
+#include <sstream>
+#include <list>
+
 int main()
 {
+    std::ostringstream arch;
+    std::list<std::string> archs;
+
    int count = 0;
-    if (cudaSuccess != cudaGetDeviceCount(&count)){return -1;}
-    if (count == 0) {return -1;}
+    if (cudaSuccess != cudaGetDeviceCount(&count)){ return -1; }
+    if (count == 0) { return -1; }
    for (int device = 0; device < count; ++device)
    {
        cudaDeviceProp prop;
-        if (cudaSuccess != cudaGetDeviceProperties(&prop, device)){ continue;}
-        printf("%d.%d ", prop.major, prop.minor);
+        if (cudaSuccess != cudaGetDeviceProperties(&prop, device)){ continue; }
+        arch << prop.major << "." << prop.minor;
+        archs.push_back(arch.str());
+        arch.str("");
    }
+    archs.unique(); #Some devices might have the same arch
+    for (std::list<std::string>::iterator it=archs.begin(); it!=archs.end(); ++it)
+        std::cout << *it << " ";
    return 0;
 }
@@ -0,0 +1,9 @@
+#include <vtkSmartPointer.h>
+#include <vtkTransform.h>
+#include <vtkMath.h>
+
+int main()
+{
+  vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
+  return 0;
+}
@@ -46,9 +46,6 @@
 /* Cocoa API */
 #cmakedefine HAVE_COCOA

-/* C= */
-#cmakedefine HAVE_CSTRIPES
-
 /* NVIDIA CUDA Basic Linear Algebra Subprograms (BLAS) API*/
 #cmakedefine HAVE_CUBLAS

@@ -147,6 +144,9 @@
 /* OpenNI library */
 #cmakedefine HAVE_OPENNI2

+/* librealsense library */
+#cmakedefine HAVE_LIBREALSENSE
+
 /* PNG codec */
 #cmakedefine HAVE_PNG

@@ -171,6 +171,9 @@
 /* Intel Threading Building Blocks */
 #cmakedefine HAVE_TBB

+/* Ste||ar Group High Performance ParallelX */
+#cmakedefine HAVE_HPX
+
 /* TIFF codec */
 #cmakedefine HAVE_TIFF

@@ -240,6 +240,9 @@ PREDEFINED             = __cplusplus=1 \
                         CV_PROP_RW= \
                         CV_WRAP= \
                         CV_WRAP_AS(x)= \
+                         CV_WRAP_MAPPABLE(x)= \
+                         CV_WRAP_PHANTOM(x)= \
+                         CV_WRAP_DEFAULT(x)= \
                         CV_CDECL= \
                         CV_Func = \
                         CV_DO_PRAGMA(x)= \
@@ -1016,20 +1016,25 @@
  year = {2017},
  organization = {IEEE}
 }
-
@ARTICLE{gonzalez,
  title={Digital Image Fundamentals, Digital Imaging Processing},
  author={Gonzalez, Rafael C and others},
  year={1987},
  publisher={Addison Wesley Publishing Company}
 }
-
@ARTICLE{gruzman,
  title={Цифровая обработка изображений в информационных системах},
  author={Грузман, И.С. and Киричук, В.С. and Косых, В.П. and Перетягин, Г.И. and Спектор, А.А.},
  year={2000},
  publisher={Изд-во НГТУ Новосибирск}
 }
+@INPROCEEDINGS{duda2018,
+    title = {Accurate Detection and Localization of Checkerboard Corners for Calibration},
+    year = {2018},
+    booktitle = {29th British Machine Vision Conference. British Machine Vision Conference (BMVC-29), September 3-6, Newcastle, United Kingdom},
+    publisher = {BMVA Press},
+    author = {Alexander Duda and Udo Frese},
+}

@book{jahne2000computer,
  title={Computer vision and applications: a guide for students and practitioners},
@@ -20,20 +20,20 @@ A simple example on extending C++ functions to Python can be found in official P
 documentation[1]. So extending all functions in OpenCV to Python by writing their wrapper functions
 manually is a time-consuming task. So OpenCV does it in a more intelligent way. OpenCV generates
 these wrapper functions automatically from the C++ headers using some Python scripts which are
-located in modules/python/src2. We will look into what they do.
+located in `modules/python/src2`. We will look into what they do.

-First, modules/python/CMakeFiles.txt is a CMake script which checks the modules to be extended to
+First, `modules/python/CMakeFiles.txt` is a CMake script which checks the modules to be extended to
 Python. It will automatically check all the modules to be extended and grab their header files.
 These header files contain list of all classes, functions, constants etc. for that particular
 modules.

-Second, these header files are passed to a Python script, modules/python/src2/gen2.py. This is the
-Python bindings generator script. It calls another Python script modules/python/src2/hdr_parser.py.
+Second, these header files are passed to a Python script, `modules/python/src2/gen2.py`. This is the
+Python bindings generator script. It calls another Python script `modules/python/src2/hdr_parser.py`.
 This is the header parser script. This header parser splits the complete header file into small
 Python lists. So these lists contain all details about a particular function, class etc. For
 example, a function will be parsed to get a list containing function name, return type, input
-arguments, argument types etc. Final list contains details of all the functions, structs, classes
-etc. in that header file.
+arguments, argument types etc. Final list contains details of all the functions, enums, structs,
+classes etc. in that header file.

 But header parser doesn't parse all the functions/classes in the header file. The developer has to
 specify which functions should be exported to Python. For that, there are certain macros added to
@@ -44,15 +44,15 @@ macros will be given in next session.

 So header parser returns a final big list of parsed functions. Our generator script (gen2.py) will
 create wrapper functions for all the functions/classes/enums/structs parsed by header parser (You
-can find these header files during compilation in the build/modules/python/ folder as
+can find these header files during compilation in the `build/modules/python/` folder as
 pyopencv_generated_\*.h files). But there may be some basic OpenCV datatypes like Mat, Vec4i,
 Size. They need to be extended manually. For example, a Mat type should be extended to Numpy array,
 Size should be extended to a tuple of two integers etc. Similarly, there may be some complex
 structs/classes/functions etc. which need to be extended manually. All such manual wrapper functions
-are placed in modules/python/src2/cv2.cpp.
+are placed in `modules/python/src2/cv2.cpp`.

 So now only thing left is the compilation of these wrapper files which gives us **cv2** module. So
-when you call a function, say res = equalizeHist(img1,img2) in Python, you pass two numpy arrays and
+when you call a function, say `res = equalizeHist(img1,img2)` in Python, you pass two numpy arrays and
 you expect another numpy array as the output. So these numpy arrays are converted to cv::Mat and
 then calls the equalizeHist() function in C++. Final result, res will be converted back into a Numpy
 array. So in short, almost all operations are done in C++ which gives us almost same speed as that
@@ -67,19 +67,19 @@ Header parser parse the header files based on some wrapper macros added to funct
 Enumeration constants don't need any wrapper macros. They are automatically wrapped. But remaining
 functions, classes etc. need wrapper macros.

-Functions are extended using CV_EXPORTS_W macro. An example is shown below.
+Functions are extended using `CV_EXPORTS_W` macro. An example is shown below.
@code{.cpp}
 CV_EXPORTS_W void equalizeHist( InputArray src, OutputArray dst );
@endcode
 Header parser can understand the input and output arguments from keywords like
 InputArray, OutputArray etc. But sometimes, we may need to hardcode inputs and outputs. For that,
-macros like CV_OUT, CV_IN_OUT etc. are used.
+macros like `CV_OUT`, `CV_IN_OUT` etc. are used.
@code{.cpp}
 CV_EXPORTS_W void minEnclosingCircle( InputArray points,
                                     CV_OUT Point2f& center, CV_OUT float& radius );
@endcode
-For large classes also, CV_EXPORTS_W is used. To extend class methods, CV_WRAP is used.
-Similarly, CV_PROP is used for class fields.
+For large classes also, `CV_EXPORTS_W` is used. To extend class methods, `CV_WRAP` is used.
+Similarly, `CV_PROP` is used for class fields.
@code{.cpp}
 class CV_EXPORTS_W CLAHE : public Algorithm
 {
@@ -90,9 +90,9 @@ public:
    CV_WRAP virtual double getClipLimit() const = 0;
 }
@endcode
-Overloaded functions can be extended using CV_EXPORTS_AS. But we need to pass a new name so that
+Overloaded functions can be extended using `CV_EXPORTS_AS`. But we need to pass a new name so that
 each function will be called by that name in Python. Take the case of integral function below. Three
-functions are available, so each one is named with a suffix in Python. Similarly CV_WRAP_AS can be
+functions are available, so each one is named with a suffix in Python. Similarly `CV_WRAP_AS` can be
 used to wrap overloaded methods.
@code{.cpp}
 //! computes the integral image
@@ -107,9 +107,9 @@ CV_EXPORTS_AS(integral3) void integral( InputArray src, OutputArray sum,
                                        OutputArray sqsum, OutputArray tilted,
                                        int sdepth = -1, int sqdepth = -1 );
@endcode
-Small classes/structs are extended using CV_EXPORTS_W_SIMPLE. These structs are passed by value
-to C++ functions. Examples are KeyPoint, Match etc. Their methods are extended by CV_WRAP and
-fields are extended by CV_PROP_RW.
+Small classes/structs are extended using `CV_EXPORTS_W_SIMPLE`. These structs are passed by value
+to C++ functions. Examples are `KeyPoint`, `Match` etc. Their methods are extended by `CV_WRAP` and
+fields are extended by `CV_PROP_RW`.
@code{.cpp}
 class CV_EXPORTS_W_SIMPLE DMatch
 {
@@ -125,8 +125,8 @@ public:
    CV_PROP_RW float distance;
 };
@endcode
-Some other small classes/structs can be exported using CV_EXPORTS_W_MAP where it is exported to a
-Python native dictionary. Moments() is an example of it.
+Some other small classes/structs can be exported using `CV_EXPORTS_W_MAP` where it is exported to a
+Python native dictionary. `Moments()` is an example of it.
@code{.cpp}
 class CV_EXPORTS_W_MAP Moments
 {
@@ -142,6 +142,41 @@ public:
 So these are the major extension macros available in OpenCV. Typically, a developer has to put
 proper macros in their appropriate positions. Rest is done by generator scripts. Sometimes, there
 may be an exceptional cases where generator scripts cannot create the wrappers. Such functions need
-to be handled manually, to do this write your own pyopencv_*.hpp extending headers and put them into
+to be handled manually, to do this write your own `pyopencv_*.hpp` extending headers and put them into
 misc/python subdirectory of your module. But most of the time, a code written according to OpenCV
-coding guidelines will be automatically wrapped by generator scripts.
+coding guidelines will be automatically wrapped by generator scripts.
+
+More advanced cases involves providing Python with additional features that does not exist
+in the C++ interface such as extra methods, type mappings, or to provide default arguments.
+We will take `UMat` datatype as an example of such cases later on.
+First, to provide Python-specific methods, `CV_WRAP_PHANTOM` is utilized in a similar manner to
+`CV_WRAP`, except that it takes the method header as its argument, and you would need to provide
+the method body in your own `pyopencv_*.hpp` extension. `UMat::queue()` and `UMat::context()` are
+an example of such phantom methods that does not exist in C++ interface, but are needed to handle
+OpenCL functionalities at the Python side.
+Second, if an already-existing datatype(s) is mappable to your class, it is highly preferable to
+indicate such capacity using `CV_WRAP_MAPPABLE` with the source type as its argument,
+rather than crafting your own binding function(s). This is the case of `UMat` which maps from `Mat`.
+Finally, if a default argument is needed, but it is not provided in the native C++ interface,
+you can provide it for Python side as the argument of `CV_WRAP_DEFAULT`. As per the `UMat::getMat`
+example below:
+@code{.cpp}
+class CV_EXPORTS_W UMat
+{
+public:
+    //! Mat is mappable to UMat.
+    // You would need to provide `static bool cv_mappable_to(const Ptr<Mat>& src, Ptr<UMat>& dst)`
+    CV_WRAP_MAPPABLE(Ptr<Mat>);
+
+    /! returns the OpenCL queue used by OpenCV UMat.
+    // You would need to provide the method body in the binder code
+    CV_WRAP_PHANTOM(static void* queue());
+
+    //! returns the OpenCL context used by OpenCV UMat
+    // You would need to provide the method body in the binder code
+    CV_WRAP_PHANTOM(static void* context());
+
+    //! The wrapped method become equvalent to `get(int flags = ACCESS_RW)`
+    CV_WRAP_AS(get) Mat getMat(int flags CV_WRAP_DEFAULT(ACCESS_RW)) const;
+};
+@endcode
@@ -36,7 +36,7 @@ gives us a feature vector containing 64 values. This is the feature vector we us

 Finally, as in the previous case, we start by splitting our big dataset into individual cells. For
 every digit, 250 cells are reserved for training data and remaining 250 data is reserved for
-testing. Full code is given below, you also can download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py):
+testing. Full code is given below, you also can download it from [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py):

@include samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py

@@ -77,13 +77,13 @@ Source code

 You may also find the source code in the `samples/cpp/tutorial_code/calib3d/camera_calibration/`
 folder of the OpenCV source library or [download it from here
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp). The program has a
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp). The program has a
 single argument: the name of its configuration file. If none is given then it will try to open the
 one named "default.xml". [Here's a sample configuration file
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/in_VID5.xml) in XML format. In the
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/in_VID5.xml) in XML format. In the
 configuration file you may choose to use camera as an input, a video file or an image list. If you
 opt for the last one, you will need to create a configuration file where you enumerate the images to
-use. Here's [an example of this ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/VID5.xml).
+use. Here's [an example of this ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/VID5.xml).
 The important part to remember is that the images need to be specified using the absolute path or
 the relative one from your application's working directory. You may find all this in the samples
 directory mentioned above.
@@ -33,19 +33,19 @@ Source Code

@add_toggle_cpp
 Download the source code from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/core/AddingImages/AddingImages.cpp).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/core/AddingImages/AddingImages.cpp).
@include cpp/tutorial_code/core/AddingImages/AddingImages.cpp
@end_toggle

@add_toggle_java
 Download the source code from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/core/AddingImages/AddingImages.java).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/core/AddingImages/AddingImages.java).
@include java/tutorial_code/core/AddingImages/AddingImages.java
@end_toggle

@add_toggle_python
 Download the source code from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/core/AddingImages/adding_images.py).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/core/AddingImages/adding_images.py).
@include python/tutorial_code/core/AddingImages/adding_images.py
@end_toggle

@@ -69,7 +69,7 @@ We need two source images (\f$f_{0}(x)\f$ and \f$f_{1}(x)\f$). So, we load them
@snippet python/tutorial_code/core/AddingImages/adding_images.py load
@end_toggle

-We used the following images: [LinuxLogo.jpg](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/LinuxLogo.jpg) and [WindowsLogo.jpg](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/WindowsLogo.jpg)
+We used the following images: [LinuxLogo.jpg](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/LinuxLogo.jpg) and [WindowsLogo.jpg](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/WindowsLogo.jpg)

@warning Since we are *adding* *src1* and *src2*, they both have to be of the same size
 (width and height) and type.
@@ -58,7 +58,7 @@ Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/BasicLinearTransforms.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/BasicLinearTransforms.cpp)

 -   The following code performs the operation \f$g(i,j) = \alpha \cdot f(i,j) + \beta\f$ :
    @include samples/cpp/tutorial_code/ImgProc/BasicLinearTransforms.cpp
@@ -66,7 +66,7 @@ Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/changing_contrast_brightness_image/BasicLinearTransformsDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/changing_contrast_brightness_image/BasicLinearTransformsDemo.java)

 -   The following code performs the operation \f$g(i,j) = \alpha \cdot f(i,j) + \beta\f$ :
    @include samples/java/tutorial_code/ImgProc/changing_contrast_brightness_image/BasicLinearTransformsDemo.java
@@ -74,7 +74,7 @@ Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/changing_contrast_brightness_image/BasicLinearTransforms.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/changing_contrast_brightness_image/BasicLinearTransforms.py)

 -   The following code performs the operation \f$g(i,j) = \alpha \cdot f(i,j) + \beta\f$ :
    @include samples/python/tutorial_code/imgProc/changing_contrast_brightness_image/BasicLinearTransforms.py
@@ -284,15 +284,15 @@ and are not intended to be used as a replacement of a raster graphics editor!**
 ### Code

@add_toggle_cpp
-Code for the tutorial is [here](https://github.com/opencv/opencv/blob/3.4/samples/cpp/tutorial_code/ImgProc/changing_contrast_brightness_image/changing_contrast_brightness_image.cpp).
+Code for the tutorial is [here](https://github.com/opencv/opencv/blob/master/samples/cpp/tutorial_code/ImgProc/changing_contrast_brightness_image/changing_contrast_brightness_image.cpp).
@end_toggle

@add_toggle_java
-Code for the tutorial is [here](https://github.com/opencv/opencv/blob/3.4/samples/java/tutorial_code/ImgProc/changing_contrast_brightness_image/ChangingContrastBrightnessImageDemo.java).
+Code for the tutorial is [here](https://github.com/opencv/opencv/blob/master/samples/java/tutorial_code/ImgProc/changing_contrast_brightness_image/ChangingContrastBrightnessImageDemo.java).
@end_toggle

@add_toggle_python
-Code for the tutorial is [here](https://github.com/opencv/opencv/blob/3.4/samples/python/tutorial_code/imgProc/changing_contrast_brightness_image/changing_contrast_brightness_image.py).
+Code for the tutorial is [here](https://github.com/opencv/opencv/blob/master/samples/python/tutorial_code/imgProc/changing_contrast_brightness_image/changing_contrast_brightness_image.py).
@end_toggle

 Code for the gamma correction:
@@ -19,7 +19,7 @@ Source code

@add_toggle_cpp
 You can [download this from here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.cpp) or
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.cpp) or
 find it in the
 `samples/cpp/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.cpp` of the
 OpenCV source code library.
@@ -27,7 +27,7 @@ OpenCV source code library.

@add_toggle_java
 You can [download this from here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/core/discrete_fourier_transform/DiscreteFourierTransform.java) or
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/core/discrete_fourier_transform/DiscreteFourierTransform.java) or
 find it in the
 `samples/java/tutorial_code/core/discrete_fourier_transform/DiscreteFourierTransform.java` of the
 OpenCV source code library.
@@ -35,7 +35,7 @@ OpenCV source code library.

@add_toggle_python
 You can [download this from here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.py) or
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.py) or
 find it in the
 `samples/python/tutorial_code/core/discrete_fourier_transform/discrete_fourier_transform.py` of the
 OpenCV source code library.
@@ -222,7 +222,7 @@ An application idea would be to determine the geometrical orientation present in
 example, let us find out if a text is horizontal or not? Looking at some text you'll notice that the
 text lines sort of form also horizontal lines and the letters form sort of vertical lines. These two
 main components of a text snippet may be also seen in case of the Fourier transform. Let us use
-[this horizontal ](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/imageTextN.png) and [this rotated](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/imageTextR.png)
+[this horizontal ](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/imageTextN.png) and [this rotated](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/imageTextR.png)
 image about a text.

 In case of the horizontal text:
@@ -19,7 +19,7 @@ Source code
 -----------

 You can [download this from here
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp) or find it in the
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp) or find it in the
 `samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp` of the OpenCV source code
 library.

@@ -54,7 +54,7 @@ three major ways of going through an image pixel by pixel. To make things a litt
 will make the scanning for each image using all of these methods, and print out how long it took.

 You can download the full source code [here
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/how_to_scan_images/how_to_scan_images.cpp) or look it up in
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/how_to_scan_images/how_to_scan_images.cpp) or look it up in
 the samples directory of OpenCV at the cpp tutorial code for the core section. Its basic usage is:
@code{.bash}
 how_to_scan_images imageName.jpg intValueToReduce [G]
@@ -9,7 +9,7 @@ Goal
 The goal of this tutorial is to show you how to use the OpenCV `parallel_for_` framework to easily
 parallelize your code. To illustrate the concept, we will write a program to draw a Mandelbrot set
 exploiting almost all the CPU load available.
-The full tutorial code is [here](https://github.com/opencv/opencv/blob/3.4/samples/cpp/tutorial_code/core/how_to_use_OpenCV_parallel_for_/how_to_use_OpenCV_parallel_for_.cpp).
+The full tutorial code is [here](https://github.com/opencv/opencv/blob/master/samples/cpp/tutorial_code/core/how_to_use_OpenCV_parallel_for_/how_to_use_OpenCV_parallel_for_.cpp).
 If you want more information about multithreading, you will have to refer to a reference book or course as this tutorial is intended
 to remain simple.

@@ -177,7 +177,7 @@ C++ 11 standard allows to simplify the parallel implementation by get rid of the
 Results
 -----------

-You can find the full tutorial code [here](https://github.com/opencv/opencv/blob/3.4/samples/cpp/tutorial_code/core/how_to_use_OpenCV_parallel_for_/how_to_use_OpenCV_parallel_for_.cpp).
+You can find the full tutorial code [here](https://github.com/opencv/opencv/blob/master/samples/cpp/tutorial_code/core/how_to_use_OpenCV_parallel_for_/how_to_use_OpenCV_parallel_for_.cpp).
 The performance of the parallel implementation depends of the type of CPU you have. For instance, on 4 cores / 8 threads
 CPU, you can expect a speed-up of around 6.9X. There are many factors to explain why we do not achieve a speed-up of almost 8X.
 Main reasons should be mostly due to:
@@ -88,7 +88,7 @@ L = Mat(pI);
 A case study
 ------------

-Now that you have the basics done [here's](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
+Now that you have the basics done [here's](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
 an example that mixes the usage of the C interface with the C++ one. You will also find it in the
 sample directory of the OpenCV source code library at the
 `samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp` .
@@ -135,7 +135,7 @@ output:

 You may observe a runtime instance of this on the [YouTube
 here](https://www.youtube.com/watch?v=qckm-zvo31w) and you can [download the source code from here
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
 or find it in the
 `samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp`
 of the OpenCV source code library.
@@ -33,7 +33,7 @@ Code

@add_toggle_cpp
 You can download this source code from [here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/core/mat_mask_operations/mat_mask_operations.cpp) or look in the
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/core/mat_mask_operations/mat_mask_operations.cpp) or look in the
 OpenCV source code libraries sample directory at
 `samples/cpp/tutorial_code/core/mat_mask_operations/mat_mask_operations.cpp`.
@include samples/cpp/tutorial_code/core/mat_mask_operations/mat_mask_operations.cpp
@@ -41,7 +41,7 @@ OpenCV source code libraries sample directory at

@add_toggle_java
 You can download this source code from [here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/core/mat_mask_operations/MatMaskOperations.java) or look in the
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/core/mat_mask_operations/MatMaskOperations.java) or look in the
 OpenCV source code libraries sample directory at
 `samples/java/tutorial_code/core/mat_mask_operations/MatMaskOperations.java`.
@include samples/java/tutorial_code/core/mat_mask_operations/MatMaskOperations.java
@@ -49,7 +49,7 @@ OpenCV source code libraries sample directory at

@add_toggle_python
 You can download this source code from [here
-](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/core/mat_mask_operations/mat_mask_operations.py) or look in the
+](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/core/mat_mask_operations/mat_mask_operations.py) or look in the
 OpenCV source code libraries sample directory at
 `samples/python/tutorial_code/core/mat_mask_operations/mat_mask_operations.py`.
@include samples/python/tutorial_code/core/mat_mask_operations/mat_mask_operations.py
@@ -262,7 +262,7 @@ OpenCV offers support for output of other common OpenCV data structures too via
    ![](images/MatBasicContainerOut15.png)

 Most of the samples here have been included in a small console application. You can download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/mat_the_basic_image_container/mat_the_basic_image_container.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/mat_the_basic_image_container/mat_the_basic_image_container.cpp)
 or in the core section of the cpp samples.

 You can also find a quick video demonstration of this on
@@ -216,7 +216,7 @@ a centric one.
@snippet dnn/edge_detection.py Register

 That's it! We've replaced an implemented OpenCV's layer to a custom one.
-You may find a full script in the [source code](https://github.com/opencv/opencv/tree/3.4/samples/dnn/edge_detection.py).
+You may find a full script in the [source code](https://github.com/opencv/opencv/tree/master/samples/dnn/edge_detection.py).

 <table border="0">
 <tr>
@@ -13,7 +13,7 @@ We will demonstrate results of this example on the following picture.
 Source Code
 -----------

-We will be using snippets from the example application, that can be downloaded [here](https://github.com/opencv/opencv/blob/3.4/samples/dnn/classification.cpp).
+We will be using snippets from the example application, that can be downloaded [here](https://github.com/opencv/opencv/blob/master/samples/dnn/classification.cpp).

@include dnn/classification.cpp

@@ -25,7 +25,7 @@ Explanation
   [bvlc_googlenet.caffemodel](http://dl.caffe.berkeleyvision.org/bvlc_googlenet.caffemodel)

   Also you need file with names of [ILSVRC2012](http://image-net.org/challenges/LSVRC/2012/browse-synsets) classes:
-   [classification_classes_ILSVRC2012.txt](https://github.com/opencv/opencv/tree/3.4/samples/dnn/classification_classes_ILSVRC2012.txt).
+   [classification_classes_ILSVRC2012.txt](https://github.com/opencv/opencv/tree/master/samples/dnn/classification_classes_ILSVRC2012.txt).

   Put these files into working dir of this program example.

@@ -68,8 +68,6 @@ MSBuild.exe /m:4 /t:Build /p:Configuration=Release .\\ALL_BUILD.vcxproj
 ## Build OpenCV with Halide backend
 When you build OpenCV add the following configuration flags:

- `ENABLE_CXX11` - enable C++11 standard
-
 - `WITH_HALIDE` - enable Halide linkage

 - `HALIDE_ROOT_DIR` - path to Halide build directory
@@ -19,8 +19,8 @@ Source Code
 -----------

 Use a universal sample for object detection models written
-[in C++](https://github.com/opencv/opencv/blob/3.4/samples/dnn/object_detection.cpp) and
-[in Python](https://github.com/opencv/opencv/blob/3.4/samples/dnn/object_detection.py) languages
+[in C++](https://github.com/opencv/opencv/blob/master/samples/dnn/object_detection.cpp) and
+[in Python](https://github.com/opencv/opencv/blob/master/samples/dnn/object_detection.py) languages

 Usage examples
 --------------
@@ -32,7 +32,7 @@ You can find the images (*graf1.png*, *graf3.png*) and homography (*H1to3p.xml*)

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/features2D/AKAZE_match.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/features2D/AKAZE_match.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/features2D/AKAZE_match.cpp
@@ -40,7 +40,7 @@ You can find the images (*graf1.png*, *graf3.png*) and homography (*H1to3p.xml*)

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/features2D/akaze_matching/AKAZEMatchDemo.java)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/features2D/akaze_matching/AKAZEMatchDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/features2D/akaze_matching/AKAZEMatchDemo.java
@@ -48,7 +48,7 @@ You can find the images (*graf1.png*, *graf3.png*) and homography (*H1to3p.xml*)

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/features2D/akaze_matching/AKAZE_match.py)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/features2D/akaze_matching/AKAZE_match.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/features2D/akaze_matching/AKAZE_match.py
@@ -24,19 +24,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp)
@include samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java)
@include samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py)
@include samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py
@end_toggle

@@ -22,19 +22,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp)
@include samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java)
@include samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py)
@include samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py
@end_toggle

@@ -45,19 +45,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp)
@include samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java)
@include samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py)
@include samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py
@end_toggle

@@ -20,19 +20,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp)
@include samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java)
@include samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py)
@include samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py
@end_toggle

@@ -12,8 +12,8 @@ For detailed explanations about the theory, please refer to a computer vision co
 *   An Invitation to 3-D Vision: From Images to Geometric Models, @cite Ma:2003:IVI
 *   Computer Vision: Algorithms and Applications, @cite RS10

-The tutorial code can be found [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/Homography).
-The images used in this tutorial can be found [here](https://github.com/opencv/opencv/tree/3.4/samples/data) (`left*.jpg`).
+The tutorial code can be found [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/Homography).
+The images used in this tutorial can be found [here](https://github.com/opencv/opencv/tree/master/samples/data) (`left*.jpg`).

 Basic theory {#tutorial_homography_Basic_theory}
 ------------
@@ -17,19 +17,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp)
@include samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java)
@include samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py)
@include samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py
@end_toggle

@@ -21,21 +21,21 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp)

@include samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java)

@include samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py)

@include samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py
@end_toggle
@@ -16,19 +16,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp)
@include samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java)
@include samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py)
@include samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py
@end_toggle

@@ -120,19 +120,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp)
@include samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java)
@include samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py)
@include samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py
@end_toggle

@@ -24,7 +24,7 @@ The source code

 You may also find the source code and the video file in the
 `samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity` directory of the OpenCV
-source library or download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp).
+source library or download it from [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp).
 The full source code is quite long (due to the controlling of the application via the command line
 arguments and performance measurement). Therefore, to avoid cluttering up these sections with those
 you'll find here only the functions itself.
@@ -27,19 +27,19 @@ Let's modify the program made in the tutorial @ref tutorial_adding_images. We wi

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp)
@include cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java)
@include java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py)
@include python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py
@end_toggle

@@ -81,19 +81,19 @@ Code

@add_toggle_cpp
 -   This code is in your OpenCV sample folder. Otherwise you can grab it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/basic_drawing/Drawing_1.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/basic_drawing/Drawing_1.cpp)
    @include samples/cpp/tutorial_code/ImgProc/basic_drawing/Drawing_1.cpp
@end_toggle

@add_toggle_java
 -   This code is in your OpenCV sample folder. Otherwise you can grab it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgProc/BasicGeometricDrawing/BasicGeometricDrawing.java)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgProc/BasicGeometricDrawing/BasicGeometricDrawing.java)
    @include samples/java/tutorial_code/ImgProc/BasicGeometricDrawing/BasicGeometricDrawing.java
@end_toggle

@add_toggle_python
 -   This code is in your OpenCV sample folder. Otherwise you can grab it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/imgProc/BasicGeometricDrawing/basic_geometric_drawing.py)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/imgProc/BasicGeometricDrawing/basic_geometric_drawing.py)
    @include samples/python/tutorial_code/imgProc/BasicGeometricDrawing/basic_geometric_drawing.py
@end_toggle

@@ -65,19 +65,19 @@ Code

@add_toggle_cpp
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp)
@include samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp
@end_toggle

@add_toggle_java
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java)
@include samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java
@end_toggle

@add_toggle_python
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py)
@include samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py
@end_toggle

@@ -98,7 +98,7 @@ Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp
@@ -106,7 +106,7 @@ Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgProc/Smoothing/Smoothing.java)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgProc/Smoothing/Smoothing.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/ImgProc/Smoothing/Smoothing.java
@@ -114,7 +114,7 @@ Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/imgProc/Smoothing/smoothing.py)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/imgProc/Smoothing/smoothing.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/imgProc/Smoothing/smoothing.py
@@ -221,7 +221,7 @@ already known by now.
 Results
 -------

-   The code opens an image (in this case [lena.jpg](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/lena.jpg))
+-   The code opens an image (in this case [lena.jpg](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/lena.jpg))
    and display it under the effects of the 4 filters explained.
 -   Here is a snapshot of the image smoothed using *medianBlur*:

@@ -74,13 +74,13 @@ Code
@add_toggle_cpp
 -   **Downloadable code**:
    -   Click
-        [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo1.cpp)
+        [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo1.cpp)
        for the basic version (explained in this tutorial).
    -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
        skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo2.cpp)
+        demo](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo2.cpp)
    -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
        in samples.

 -   **Code at glance:**
@@ -90,13 +90,13 @@ Code
@add_toggle_java
 -   **Downloadable code**:
    -   Click
-        [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo1.java)
+        [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo1.java)
        for the basic version (explained in this tutorial).
    -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
        skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo2.java)
+        demo](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo2.java)
    -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
        in samples.

 -   **Code at glance:**
@@ -106,13 +106,13 @@ Code
@add_toggle_python
 -   **Downloadable code**:
    -   Click
-        [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo1.py)
+        [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo1.py)
        for the basic version (explained in this tutorial).
    -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
        skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo2.py)
+        demo](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo2.py)
    -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
        in samples.

 -   **Code at glance:**
@@ -72,7 +72,7 @@ Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp
@@ -80,7 +80,7 @@ Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java
@@ -88,7 +88,7 @@ Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py
@@ -49,7 +49,7 @@ Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp
@@ -57,7 +57,7 @@ Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java
@@ -65,7 +65,7 @@ Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py
@@ -67,7 +67,7 @@ Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp
@@ -75,7 +75,7 @@ Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java
@@ -83,7 +83,7 @@ Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py
@@ -130,7 +130,7 @@ Code
@add_toggle_cpp

 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp)
 -   **Code at glance:**
    @include samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp

@@ -139,7 +139,7 @@ Code
@add_toggle_java

 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java)
 -   **Code at glance:**
    @include samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java

@@ -148,7 +148,7 @@ Code
@add_toggle_python

 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/match_template/match_template.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/match_template/match_template.py)
 -   **Code at glance:**
    @include samples/python/tutorial_code/imgProc/match_template/match_template.py

@@ -48,19 +48,19 @@ The code corresponding to the previous example is shown below.

@add_toggle_cpp
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/HitMiss/HitMiss.cpp)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/HitMiss/HitMiss.cpp)
@include samples/cpp/tutorial_code/ImgProc/HitMiss/HitMiss.cpp
@end_toggle

@add_toggle_java
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgProc/HitMiss/HitMiss.java)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgProc/HitMiss/HitMiss.java)
@include samples/java/tutorial_code/ImgProc/HitMiss/HitMiss.java
@end_toggle

@add_toggle_python
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/imgProc/HitMiss/hit_miss.py)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/imgProc/HitMiss/hit_miss.py)
@include samples/python/tutorial_code/imgProc/HitMiss/hit_miss.py
@end_toggle

@@ -71,19 +71,19 @@ Code

@add_toggle_cpp
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp)
    @include samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp
@end_toggle

@add_toggle_java
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java)
    @include samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java
@end_toggle

@add_toggle_python
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py)
    @include samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py
@end_toggle

@@ -52,19 +52,19 @@ The tutorial code's is shown lines below.

@add_toggle_cpp
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp)
@include samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp
@end_toggle

@add_toggle_java
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java)
@include samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java
@end_toggle

@add_toggle_python
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/MakeBorder/copy_make_border.py)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/MakeBorder/copy_make_border.py)
@include samples/python/tutorial_code/ImgTrans/MakeBorder/copy_make_border.py
@end_toggle

@@ -21,19 +21,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp).
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp).
@include samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgTrans/distance_transformation/ImageSegmentationDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgTrans/distance_transformation/ImageSegmentationDemo.java)
@include samples/java/tutorial_code/ImgTrans/distance_transformation/ImageSegmentationDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ImgTrans/distance_transformation/imageSegmentation.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ImgTrans/distance_transformation/imageSegmentation.py)
@include samples/python/tutorial_code/ImgTrans/distance_transformation/imageSegmentation.py
@end_toggle

@@ -68,19 +68,19 @@ The tutorial code's is shown in the lines below.

@add_toggle_cpp
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/filter2D_demo.cpp)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/filter2D_demo.cpp)
@include cpp/tutorial_code/ImgTrans/filter2D_demo.cpp
@end_toggle

@add_toggle_java
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/Filter2D/Filter2D_Demo.java)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/Filter2D/Filter2D_Demo.java)
@include java/tutorial_code/ImgTrans/Filter2D/Filter2D_Demo.java
@end_toggle

@add_toggle_python
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/Filter2D/filter2D.py)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/Filter2D/filter2D.py)
@include python/tutorial_code/ImgTrans/Filter2D/filter2D.py
@end_toggle

@@ -44,28 +44,28 @@ Code

@add_toggle_cpp
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/houghcircles.cpp).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/houghcircles.cpp).
 A slightly fancier version (which shows trackbars for changing the threshold values) can be found
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/HoughCircle_Demo.cpp).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/HoughCircle_Demo.cpp).
@include samples/cpp/tutorial_code/ImgTrans/houghcircles.cpp
@end_toggle

@add_toggle_java
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/HoughCircle/HoughCircles.java).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/HoughCircle/HoughCircles.java).
@include samples/java/tutorial_code/ImgTrans/HoughCircle/HoughCircles.java
@end_toggle

@add_toggle_python
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/HoughCircle/hough_circle.py).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/HoughCircle/hough_circle.py).
@include samples/python/tutorial_code/ImgTrans/HoughCircle/hough_circle.py
@end_toggle

 Explanation
 -----------

-The image we used can be found [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/smarties.png)
+The image we used can be found [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/smarties.png)

 ####  Load an image:

@@ -100,22 +100,22 @@ Code

@add_toggle_cpp
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/houghlines.cpp).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/houghlines.cpp).
 A slightly fancier version (which shows both Hough standard and probabilistic
 with trackbars for changing the threshold values) can be found
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/HoughLines_Demo.cpp).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/HoughLines_Demo.cpp).
@include samples/cpp/tutorial_code/ImgTrans/houghlines.cpp
@end_toggle

@add_toggle_java
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/HoughLine/HoughLines.java).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/HoughLine/HoughLines.java).
@include samples/java/tutorial_code/ImgTrans/HoughLine/HoughLines.java
@end_toggle

@add_toggle_python
 The sample code that we will explain can be downloaded from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/HoughLine/hough_lines.py).
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/HoughLine/hough_lines.py).
@include samples/python/tutorial_code/ImgTrans/HoughLine/hough_lines.py
@end_toggle

@@ -271,7 +271,7 @@ Result
    section. It still implements the same stuff as above, only adding the Trackbar for the
    Threshold.

-Using an input image such as a [sudoku image](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/sudoku.png).
+Using an input image such as a [sudoku image](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/sudoku.png).
 We get the following result by using the Standard Hough Line Transform:
 ![](images/hough_lines_result1.png)
 And by using the Probabilistic Hough Line Transform:
@@ -55,19 +55,19 @@ Code

@add_toggle_cpp
 -#  The tutorial code's is shown lines below. You can also download it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/Laplace_Demo.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/Laplace_Demo.cpp)
    @include samples/cpp/tutorial_code/ImgTrans/Laplace_Demo.cpp
@end_toggle

@add_toggle_java
 -#  The tutorial code's is shown lines below. You can also download it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/LaPlace/LaplaceDemo.java)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/LaPlace/LaplaceDemo.java)
    @include samples/java/tutorial_code/ImgTrans/LaPlace/LaplaceDemo.java
@end_toggle

@add_toggle_python
 -#  The tutorial code's is shown lines below. You can also download it from
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/LaPlace/laplace_demo.py)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/LaPlace/laplace_demo.py)
    @include samples/python/tutorial_code/ImgTrans/LaPlace/laplace_demo.py
@end_toggle

@@ -56,19 +56,19 @@ Code

@add_toggle_cpp
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp)
    @include samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp
@end_toggle

@add_toggle_java
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java)
    @include samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java
@end_toggle

@add_toggle_python
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py)
    @include samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py
@end_toggle

@@ -114,19 +114,19 @@ Code

@add_toggle_cpp
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgTrans/Sobel_Demo.cpp)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgTrans/Sobel_Demo.cpp)
@include samples/cpp/tutorial_code/ImgTrans/Sobel_Demo.cpp
@end_toggle

@add_toggle_java
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgTrans/SobelDemo/SobelDemo.java)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgTrans/SobelDemo/SobelDemo.java)
@include samples/java/tutorial_code/ImgTrans/SobelDemo/SobelDemo.java
@end_toggle

@add_toggle_python
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/SobelDemo/sobel_demo.py)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/SobelDemo/sobel_demo.py)
@include samples/python/tutorial_code/ImgTrans/SobelDemo/sobel_demo.py
@end_toggle

@@ -93,19 +93,19 @@ Code

@add_toggle_cpp
 -   The tutorial's code is shown below. You can also download it
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)
    @include samples/cpp/tutorial_code/ImgTrans/Geometric_Transforms_Demo.cpp
@end_toggle

@add_toggle_java
 -   The tutorial's code is shown below. You can also download it
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp)
    @include samples/java/tutorial_code/ImgTrans/warp_affine/GeometricTransformsDemo.java
@end_toggle

@add_toggle_python
 -   The tutorial's code is shown below. You can also download it
-    [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/ImgTrans/warp_affine/Geometric_Transforms_Demo.py)
+    [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/ImgTrans/warp_affine/Geometric_Transforms_Demo.py)
    @include samples/python/tutorial_code/ImgTrans/warp_affine/Geometric_Transforms_Demo.py
@end_toggle

@@ -54,24 +54,24 @@ Code
 This tutorial code's is shown lines below.

@add_toggle_cpp
-You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.cpp).
+You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.cpp).
@include samples/cpp/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.cpp
@end_toggle

@add_toggle_java
-You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.java).
+You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.java).
@include samples/java/tutorial_code/ImgProc/morph_lines_detection/Morphology_3.java
@end_toggle

@add_toggle_python
-You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/imgProc/morph_lines_detection/morph_lines_detection.py).
+You can also download it from [here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/imgProc/morph_lines_detection/morph_lines_detection.py).
@include samples/python/tutorial_code/imgProc/morph_lines_detection/morph_lines_detection.py
@end_toggle

 Explanation / Result
 --------------------

-Get image from [here](https://raw.githubusercontent.com/opencv/opencv/3.4/doc/tutorials/imgproc/morph_lines_detection/images/src.png) .
+Get image from [here](https://raw.githubusercontent.com/opencv/opencv/master/doc/tutorials/imgproc/morph_lines_detection/images/src.png) .

 #### Load Image

@@ -84,19 +84,19 @@ Code

@add_toggle_cpp
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp)
@include cpp/tutorial_code/ImgProc/Morphology_2.cpp
@end_toggle

@add_toggle_java
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java)
@include java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java
@end_toggle

@add_toggle_python
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py)
@include python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py
@end_toggle

@@ -72,19 +72,19 @@ This tutorial code's is shown lines below.

@add_toggle_cpp
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/cpp/tutorial_code/ImgProc/Pyramids/Pyramids.cpp)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/cpp/tutorial_code/ImgProc/Pyramids/Pyramids.cpp)
@include samples/cpp/tutorial_code/ImgProc/Pyramids/Pyramids.cpp
@end_toggle

@add_toggle_java
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/java/tutorial_code/ImgProc/Pyramids/Pyramids.java)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/java/tutorial_code/ImgProc/Pyramids/Pyramids.java)
@include samples/java/tutorial_code/ImgProc/Pyramids/Pyramids.java
@end_toggle

@add_toggle_python
 You can also download it from
-[here](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/python/tutorial_code/imgProc/Pyramids/pyramids.py)
+[here](https://raw.githubusercontent.com/opencv/opencv/master/samples/python/tutorial_code/imgProc/Pyramids/pyramids.py)
@include samples/python/tutorial_code/imgProc/Pyramids/pyramids.py
@end_toggle

@@ -184,7 +184,7 @@ Otherwise, an error will be shown.
 Results
 -------

-   The program calls by default an image [chicky_512.png](https://raw.githubusercontent.com/opencv/opencv/3.4/samples/data/chicky_512.png)
+-   The program calls by default an image [chicky_512.png](https://raw.githubusercontent.com/opencv/opencv/master/samples/data/chicky_512.png)
    that comes in the `samples/data` folder. Notice that this image is \f$512 \times 512\f$,
    hence a downsample won't generate any error (\f$512 = 2^{9}\f$). The original image is shown below:

@@ -20,19 +20,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/bounding_rects_circles/GeneralContoursDemo1.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/bounding_rects_circles/GeneralContoursDemo1.java)
@include samples/java/tutorial_code/ShapeDescriptors/bounding_rects_circles/GeneralContoursDemo1.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/bounding_rects_circles/generalContours_demo1.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/bounding_rects_circles/generalContours_demo1.py)
@include samples/python/tutorial_code/ShapeDescriptors/bounding_rects_circles/generalContours_demo1.py
@end_toggle

@@ -20,19 +20,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/GeneralContoursDemo2.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/GeneralContoursDemo2.java)
@include samples/java/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/GeneralContoursDemo2.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/generalContours_demo2.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/generalContours_demo2.py)
@include samples/python/tutorial_code/ShapeDescriptors/bounding_rotated_ellipses/generalContours_demo2.py
@end_toggle

@@ -20,19 +20,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/find_contours/FindContoursDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/find_contours/FindContoursDemo.java)
@include samples/java/tutorial_code/ShapeDescriptors/find_contours/FindContoursDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/find_contours/findContours_demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/find_contours/findContours_demo.py)
@include samples/python/tutorial_code/ShapeDescriptors/find_contours/findContours_demo.py
@end_toggle

@@ -19,19 +19,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/hull/HullDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/hull/HullDemo.java)
@include samples/java/tutorial_code/ShapeDescriptors/hull/HullDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/hull/hull_demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/hull/hull_demo.py)
@include samples/python/tutorial_code/ShapeDescriptors/hull/hull_demo.py
@end_toggle

@@ -21,19 +21,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/moments/MomentsDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/moments/MomentsDemo.java)
@include samples/java/tutorial_code/ShapeDescriptors/moments/MomentsDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/moments/moments_demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/moments/moments_demo.py)
@include samples/python/tutorial_code/ShapeDescriptors/moments/moments_demo.py
@end_toggle

@@ -19,19 +19,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp)
@include samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ShapeDescriptors/point_polygon_test/PointPolygonTestDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ShapeDescriptors/point_polygon_test/PointPolygonTestDemo.java)
@include samples/java/tutorial_code/ShapeDescriptors/point_polygon_test/PointPolygonTestDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ShapeDescriptors/point_polygon_test/pointPolygonTest_demo.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ShapeDescriptors/point_polygon_test/pointPolygonTest_demo.py)
@include samples/python/tutorial_code/ShapeDescriptors/point_polygon_test/pointPolygonTest_demo.py
@end_toggle

@@ -101,19 +101,19 @@ Code

@add_toggle_cpp
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Threshold.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Threshold.cpp)
@include samples/cpp/tutorial_code/ImgProc/Threshold.cpp
@end_toggle

@add_toggle_java
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/threshold/Threshold.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/threshold/Threshold.java)
@include samples/java/tutorial_code/ImgProc/threshold/Threshold.java
@end_toggle

@add_toggle_python
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/threshold/threshold.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/threshold/threshold.py)
@include samples/python/tutorial_code/imgProc/threshold/threshold.py
@end_toggle

@@ -43,19 +43,19 @@ Code

@add_toggle_cpp
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp)
@include samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp
@end_toggle

@add_toggle_java
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java)
@include samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java
@end_toggle

@add_toggle_python
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py)
@include samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py
@end_toggle

@@ -19,18 +19,6 @@ If you encounter any error after thoroughly following these steps, feel free to
 [OpenCV4Android](https://groups.google.com/group/android-opencv/) discussion group or OpenCV [Q&A
 forum](http://answers.opencv.org). We'll do our best to help you out.

-Tegra Android Development Pack users
------------------------------------
-
-You may have used [Tegra Android Development
-Pack](http://developer.nvidia.com/tegra-android-development-pack) (**TADP**) released by **NVIDIA**
-for Android development environment setup.
-
-Beside Android development tools the TADP 2.0 includes OpenCV4Android SDK, so it can be already
-installed in your system and you can skip to @ref tutorial_O4A_SDK_samples "samples" section of this tutorial.
-
-More details regarding TADP can be found in the @ref tutorial_android_dev_intro guide.
-
 General info
 ------------

@@ -31,31 +31,6 @@ key topis:
 -#  OpenCV development will certainly require some knowledge of the [Android
    Camera](http://developer.android.com/guide/topics/media/camera.html) specifics.

-Quick environment setup for Android development
-----------------------------------------------
-
-If you are making a clean environment install, then you can try [Tegra Android Development
-Pack](https://developer.nvidia.com/tegra-android-development-pack) (**TADP**) released by
-**NVIDIA**.
-
-@note Starting the *version 2.0* the TADP package includes *OpenCV for Tegra* SDK that is a regular
-*OpenCV4Android SDK* extended with Tegra-specific stuff. When unpacked, TADP will cover all of the
-environment setup automatically and you can skip the rest of the guide.
-
-If you are a beginner in Android development then we also recommend you to start with TADP.
-
-@note *NVIDIA*'s Tegra Android Development Pack includes some special features for *NVIDIA*’s [Tegra
-platform](http://www.nvidia.com/object/tegra-3-processor.html)
-but its use is not limited to *Tegra* devices only. \* You need at least *1.6 Gb* free
-disk space for the install.
-
-   TADP will download Android SDK platforms and Android NDK from Google's server, so Internet
-    connection is required for the installation.
-   TADP may ask you to flash your development kit at the end of installation process. Just skip
-    this step if you have no [Tegra Development Kit](http://developer.nvidia.com/mobile/tegra-hardware-sales-inquiries).
-   (UNIX) TADP will ask you for *root* in the middle of installation, so you need to be a member of
-    *sudo* group.
-
 Manual environment setup for Android development
 ------------------------------------------------

@@ -17,7 +17,7 @@ If you need help with anything of the above, you may refer to our @ref tutorial_
 This tutorial also assumes you have an Android operated device with OpenCL enabled.

 The related source code is located within OpenCV samples at
-[opencv/samples/android/tutorial-4-opencl](https://github.com/opencv/opencv/tree/3.4/samples/android/tutorial-4-opencl/) directory.
+[opencv/samples/android/tutorial-4-opencl](https://github.com/opencv/opencv/tree/master/samples/android/tutorial-4-opencl/) directory.

 Preface
 -------
@@ -144,7 +144,7 @@ Here is a simple Java wrapper for our JNI stuff:
 public class NativeGLRenderer {
    static
    {
-        System.loadLibrary("opencv_java3"); // comment this when using OpenCV Manager
+        System.loadLibrary("opencv_java4"); // comment this when using OpenCV Manager
        System.loadLibrary("JNIrender");
    }

@@ -244,7 +244,7 @@ As you can see, inheritors for `Camera` and `Camera2` APIs should implement the
@endcode

 Let's leave the details of their implementation beyond of this tutorial, please refer the
-[source code](https://github.com/opencv/opencv/tree/3.4/samples/android/tutorial-4-opencl/) to see them.
+[source code](https://github.com/opencv/opencv/tree/master/samples/android/tutorial-4-opencl/) to see them.

 Preview Frames modification
 ---------------------------
@@ -383,7 +383,7 @@ Unfortunately `UMat` keeps OpenCL _buffer_ internally, that can't be wrapped ove
  path/to/cmake.exe -GNinja -DCMAKE_MAKE_PROGRAM="path/to/ninja.exe" -DCMAKE_TOOLCHAIN_FILE=path/to/opencv/platforms/android/android.toolchain.cmake -DANDROID_ABI="armeabi-v7a with NEON" -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON path/to/opencv
  path/to/ninja.exe install/strip
  @endcode
-  To use your own modified `libopencv_java3.so` you have to keep inside your APK, not to use OpenCV Manager and load it manually via `System.loadLibrary("opencv_java3")`.
+  To use your own modified `libopencv_java4.so` you have to keep inside your APK, not to use OpenCV Manager and load it manually via `System.loadLibrary("opencv_java4")`.

 Performance notes
 -----------------
@@ -14,7 +14,7 @@ Source Code
 -----------

 Download the source code from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/introduction/display_image/display_image.cpp).
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/introduction/display_image/display_image.cpp).

@include cpp/tutorial_code/introduction/display_image/display_image.cpp

@@ -194,7 +194,7 @@ Test it!
 --------

 Now to try this out download our little test [source code
-](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/introduction/windows_visual_studio_opencv/introduction_windows_vs.cpp)
+](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/introduction/windows_visual_studio_opencv/introduction_windows_vs.cpp)
 or get it from the sample code folder of the OpenCV sources. Add this to your project and build it.
 Here's its content:

@@ -210,7 +210,7 @@ the *IDE* the console window will not close once finished. It will wait for a ke
 This is important to remember when you code inside the code open and save commands. Your resources
 will be saved ( and queried for at opening!!!) relatively to your working directory. This is unless
 you give a full, explicit path as a parameter for the I/O functions. In the code above we open [this
-OpenCV logo](https://github.com/opencv/opencv/tree/3.4/samples/data/opencv-logo.png). Before starting up the application,
+OpenCV logo](https://github.com/opencv/opencv/tree/master/samples/data/opencv-logo.png). Before starting up the application,
 make sure you place
 the image file in your current working directory. Modify the image file name inside the code to try
 it out on other images too. Run it and voil á:
@@ -93,7 +93,7 @@ Source Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp
@@ -101,7 +101,7 @@ Source Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ml/introduction_to_pca/IntroductionToPCADemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ml/introduction_to_pca/IntroductionToPCADemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/ml/introduction_to_pca/IntroductionToPCADemo.java
@@ -109,13 +109,13 @@ Source Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ml/introduction_to_pca/introduction_to_pca.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ml/introduction_to_pca/introduction_to_pca.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/ml/introduction_to_pca/introduction_to_pca.py
@end_toggle

-@note Another example using PCA for dimensionality reduction while maintaining an amount of variance can be found at [opencv_source_code/samples/cpp/pca.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/pca.cpp)
+@note Another example using PCA for dimensionality reduction while maintaining an amount of variance can be found at [opencv_source_code/samples/cpp/pca.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/pca.cpp)

 Explanation
 -----------
@@ -98,7 +98,7 @@ Source Code

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/introduction_to_svm/introduction_to_svm.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/introduction_to_svm/introduction_to_svm.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/ml/introduction_to_svm/introduction_to_svm.cpp
@@ -106,7 +106,7 @@ Source Code

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ml/introduction_to_svm/IntroductionToSVMDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ml/introduction_to_svm/IntroductionToSVMDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/ml/introduction_to_svm/IntroductionToSVMDemo.java
@@ -114,7 +114,7 @@ Source Code

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ml/introduction_to_svm/introduction_to_svm.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ml/introduction_to_svm/introduction_to_svm.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/ml/introduction_to_svm/introduction_to_svm.py
@@ -87,14 +87,14 @@ Source Code
 -----------

 You may also find the source code in `samples/cpp/tutorial_code/ml/non_linear_svms` folder of the OpenCV source library or
-[download it from here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp).
+[download it from here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp).

@note The following code has been implemented with OpenCV 3.0 classes and functions. An equivalent version of the code
 using OpenCV 2.4 can be found in [this page.](http://docs.opencv.org/2.4/doc/tutorials/ml/non_linear_svms/non_linear_svms.html#nonlinearsvms)

@add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp)
+    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp)

 -   **Code at glance:**
    @include samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp
@@ -102,7 +102,7 @@ using OpenCV 2.4 can be found in [this page.](http://docs.opencv.org/2.4/doc/tut

@add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ml/non_linear_svms/NonLinearSVMsDemo.java)
+    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ml/non_linear_svms/NonLinearSVMsDemo.java)

 -   **Code at glance:**
    @include samples/java/tutorial_code/ml/non_linear_svms/NonLinearSVMsDemo.java
@@ -110,7 +110,7 @@ using OpenCV 2.4 can be found in [this page.](http://docs.opencv.org/2.4/doc/tut

@add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ml/non_linear_svms/non_linear_svms.py)
+    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ml/non_linear_svms/non_linear_svms.py)

 -   **Code at glance:**
    @include samples/python/tutorial_code/ml/non_linear_svms/non_linear_svms.py
@@ -19,19 +19,19 @@ Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/objectDetection/objectDetection.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/objectDetection/objectDetection.cpp)
@include samples/cpp/tutorial_code/objectDetection/objectDetection.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/objectDetection/cascade_classifier/ObjectDetectionDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/objectDetection/cascade_classifier/ObjectDetectionDemo.java)
@include samples/java/tutorial_code/objectDetection/cascade_classifier/ObjectDetectionDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/objectDetection/cascade_classifier/objectDetection.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/objectDetection/cascade_classifier/objectDetection.py)
@include samples/python/tutorial_code/objectDetection/cascade_classifier/objectDetection.py
@end_toggle

@@ -6,7 +6,7 @@ Introduction

 Working with a boosted cascade of weak classifiers includes two major stages: the training and the detection stage. The detection stage using either HAAR or LBP based models, is described in the @ref tutorial_cascade_classifier "object detection tutorial". This documentation gives an overview of the functionality needed to train your own boosted cascade of weak classifiers. The current guide will walk through all the different stages: collecting training data, preparation of the training data and executing the actual model training.

-To support this tutorial, several official OpenCV applications will be used: [opencv_createsamples](https://github.com/opencv/opencv/tree/3.4/apps/createsamples), [opencv_annotation](https://github.com/opencv/opencv/tree/3.4/apps/annotation), [opencv_traincascade](https://github.com/opencv/opencv/tree/3.4/apps/traincascade) and [opencv_visualisation](https://github.com/opencv/opencv/tree/3.4/apps/visualisation).
+To support this tutorial, several official OpenCV applications will be used: [opencv_createsamples](https://github.com/opencv/opencv/tree/master/apps/createsamples), [opencv_annotation](https://github.com/opencv/opencv/tree/master/apps/annotation), [opencv_traincascade](https://github.com/opencv/opencv/tree/master/apps/traincascade) and [opencv_visualisation](https://github.com/opencv/opencv/tree/master/apps/visualisation).

 ### Important notes

@@ -33,19 +33,19 @@ Source Code

@add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/photo/hdr_imaging/hdr_imaging.cpp)
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/photo/hdr_imaging/hdr_imaging.cpp)
@include samples/cpp/tutorial_code/photo/hdr_imaging/hdr_imaging.cpp
@end_toggle

@add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/photo/hdr_imaging/HDRImagingDemo.java)
+[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/photo/hdr_imaging/HDRImagingDemo.java)
@include samples/java/tutorial_code/photo/hdr_imaging/HDRImagingDemo.java
@end_toggle

@add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/photo/hdr_imaging/hdr_imaging.py)
+[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/photo/hdr_imaging/hdr_imaging.py)
@include samples/python/tutorial_code/photo/hdr_imaging/hdr_imaging.py
@end_toggle

@@ -53,7 +53,7 @@ Sample images
 -------------

 Data directory that contains images, exposure times and `list.txt` file can be downloaded from
-[here](https://github.com/opencv/opencv_extra/tree/3.4/testdata/cv/hdr/exposures).
+[here](https://github.com/opencv/opencv_extra/tree/master/testdata/cv/hdr/exposures).

 Explanation
 -----------
@@ -15,7 +15,7 @@ Code
 ----

 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/samples/cpp/stitching.cpp).
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/samples/cpp/stitching.cpp).

@include samples/cpp/stitching.cpp

@@ -101,5 +101,5 @@ See also

 If you want to study internals of the stitching pipeline or you want to experiment with detailed
 configuration see
-[stitching_detailed.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/stitching_detailed.cpp)
+[stitching_detailed.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/stitching_detailed.cpp)
 in `opencv/samples/cpp` folder.
@@ -43,7 +43,7 @@ file or a sequence of images.
 We will use @ref cv::BackgroundSubtractorMOG2 in this sample, to generate the foreground mask.

 The results as well as the input data are shown on the screen.
-The source file can be downloaded [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/video/bg_sub.cpp).
+The source file can be downloaded [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/video/bg_sub.cpp).

@include samples/cpp/tutorial_code/video/bg_sub.cpp

@@ -78,5 +78,5 @@ there are two flags that should be used to set/get property of the needed genera
    flag value is assumed by default if neither of the two possible values of the property is set.

 For more information please refer to the example of usage
-[intelperc_capture.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/intelperc_capture.cpp)
+[intelperc_capture.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/intelperc_capture.cpp)
 in opencv/samples/cpp folder.
--- a/Show More
+++ b/Show More