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cleanup: IPP Async (IPP_A)
except header file with conversion routines (will be removed in OpenCV 4.0)
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@@ -1,7 +1,7 @@
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How to use the OpenCV parallel_for_ to parallelize your code {#tutorial_how_to_use_OpenCV_parallel_for_}
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==================================================================
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@prev_tutorial{tutorial_how_to_use_ippa_conversion}
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@prev_tutorial{tutorial_interoperability_with_OpenCV_1}
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Goal
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----
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@@ -1,146 +0,0 @@
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Intel® IPP Asynchronous C/C++ library in OpenCV {#tutorial_how_to_use_ippa_conversion}
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===============================================
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@prev_tutorial{tutorial_interoperability_with_OpenCV_1}
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@next_tutorial{tutorial_how_to_use_OpenCV_parallel_for_}
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Goal
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----
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The tutorial demonstrates the [Intel® IPP Asynchronous
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C/C++](http://software.intel.com/en-us/intel-ipp-preview) library usage with OpenCV. The code
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example below illustrates implementation of the Sobel operation, accelerated with Intel® IPP
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Asynchronous C/C++ functions. In this code example, @ref cv::hpp::getMat and @ref cv::hpp::getHpp
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functions are used for data conversion between
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[hppiMatrix](http://software.intel.com/en-us/node/501660) and Mat matrices.
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Code
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----
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You may also find the source code in the
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`samples/cpp/tutorial_code/core/ippasync/ippasync_sample.cpp` file of the OpenCV source library or
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download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/ippasync/ippasync_sample.cpp).
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@include cpp/tutorial_code/core/ippasync/ippasync_sample.cpp
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Explanation
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-----------
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-# Create parameters for OpenCV:
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@code{.cpp}
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VideoCapture cap;
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Mat image, gray, result;
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@endcode
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and IPP Async:
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@code{.cpp}
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hppiMatrix* src,* dst;
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hppAccel accel = 0;
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hppAccelType accelType;
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hppStatus sts;
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hppiVirtualMatrix * virtMatrix;
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@endcode
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-# Load input image or video. How to open and read video stream you can see in the
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@ref tutorial_video_input_psnr_ssim tutorial.
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@code{.cpp}
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if( useCamera )
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{
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printf("used camera\n");
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cap.open(0);
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}
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else
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{
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printf("used image %s\n", file.c_str());
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cap.open(file.c_str());
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}
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if( !cap.isOpened() )
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{
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printf("can not open camera or video file\n");
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return -1;
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}
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@endcode
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-# Create accelerator instance using
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[hppCreateInstance](http://software.intel.com/en-us/node/501686):
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@code{.cpp}
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accelType = sAccel == "cpu" ? HPP_ACCEL_TYPE_CPU:
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sAccel == "gpu" ? HPP_ACCEL_TYPE_GPU:
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HPP_ACCEL_TYPE_ANY;
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//Create accelerator instance
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sts = hppCreateInstance(accelType, 0, &accel);
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CHECK_STATUS(sts, "hppCreateInstance");
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@endcode
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-# Create an array of virtual matrices using
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[hppiCreateVirtualMatrices](http://software.intel.com/en-us/node/501700) function.
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@code{.cpp}
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virtMatrix = hppiCreateVirtualMatrices(accel, 1);
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@endcode
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-# Prepare a matrix for input and output data:
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@code{.cpp}
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cap >> image;
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if(image.empty())
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break;
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cvtColor( image, gray, COLOR_BGR2GRAY );
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result.create( image.rows, image.cols, CV_8U);
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@endcode
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-# Convert Mat to [hppiMatrix](http://software.intel.com/en-us/node/501660) using @ref cv::hpp::getHpp
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and call [hppiSobel](http://software.intel.com/en-us/node/474701) function.
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@code{.cpp}
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//convert Mat to hppiMatrix
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src = getHpp(gray, accel);
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dst = getHpp(result, accel);
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sts = hppiSobel(accel,src, HPP_MASK_SIZE_3X3,HPP_NORM_L1,virtMatrix[0]);
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CHECK_STATUS(sts,"hppiSobel");
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sts = hppiConvert(accel, virtMatrix[0], 0, HPP_RND_MODE_NEAR, dst, HPP_DATA_TYPE_8U);
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CHECK_STATUS(sts,"hppiConvert");
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// Wait for tasks to complete
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sts = hppWait(accel, HPP_TIME_OUT_INFINITE);
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CHECK_STATUS(sts, "hppWait");
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@endcode
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We use [hppiConvert](http://software.intel.com/en-us/node/501746) because
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[hppiSobel](http://software.intel.com/en-us/node/474701) returns destination matrix with
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HPP_DATA_TYPE_16S data type for source matrix with HPP_DATA_TYPE_8U type. You should check
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hppStatus after each call IPP Async function.
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-# Create windows and show the images, the usual way.
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@code{.cpp}
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imshow("image", image);
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imshow("rez", result);
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waitKey(15);
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@endcode
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-# Delete hpp matrices.
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@code{.cpp}
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sts = hppiFreeMatrix(src);
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CHECK_DEL_STATUS(sts,"hppiFreeMatrix");
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sts = hppiFreeMatrix(dst);
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CHECK_DEL_STATUS(sts,"hppiFreeMatrix");
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@endcode
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-# Delete virtual matrices and accelerator instance.
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@code{.cpp}
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if (virtMatrix)
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{
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sts = hppiDeleteVirtualMatrices(accel, virtMatrix);
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CHECK_DEL_STATUS(sts,"hppiDeleteVirtualMatrices");
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}
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if (accel)
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{
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sts = hppDeleteInstance(accel);
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CHECK_DEL_STATUS(sts, "hppDeleteInstance");
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}
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@endcode
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Result
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------
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After compiling the code above we can execute it giving an image or video path and accelerator type
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as an argument. For this tutorial we use baboon.png image as input. The result is below.
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+1
-1
@@ -2,7 +2,7 @@ Interoperability with OpenCV 1 {#tutorial_interoperability_with_OpenCV_1}
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==============================
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@prev_tutorial{tutorial_file_input_output_with_xml_yml}
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@next_tutorial{tutorial_how_to_use_ippa_conversion}
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@next_tutorial{tutorial_how_to_use_OpenCV_parallel_for_}
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Goal
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----
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@@ -93,15 +93,6 @@ understanding how to manipulate the images on a pixel level.
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Look here to shed light on all this questions.
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- @subpage tutorial_how_to_use_ippa_conversion
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*Compatibility:* \> OpenCV 2.0
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*Author:* Elena Gvozdeva
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You will see how to use the IPP Async with OpenCV.
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- @subpage tutorial_how_to_use_OpenCV_parallel_for_
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*Compatibility:* \>= OpenCV 2.4.3
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