diff --git a/modules/core/include/opencv2/core/mat.hpp b/modules/core/include/opencv2/core/mat.hpp
index 33167fab20..6b8368fd57 100644
--- a/modules/core/include/opencv2/core/mat.hpp
+++ b/modules/core/include/opencv2/core/mat.hpp
@@ -118,6 +118,8 @@ public:
 
     virtual int kind() const;
     virtual int dims(int i=-1) const;
+    virtual int cols(int i=-1) const;
+    virtual int rows(int i=-1) const;
     virtual Size size(int i=-1) const;
     virtual int sizend(int* sz, int i=-1) const;
     virtual bool sameSize(const _InputArray& arr) const;
diff --git a/modules/core/include/opencv2/core/ocl.hpp b/modules/core/include/opencv2/core/ocl.hpp
index fb9ec24c56..fdb6f9a0aa 100644
--- a/modules/core/include/opencv2/core/ocl.hpp
+++ b/modules/core/include/opencv2/core/ocl.hpp
@@ -592,7 +592,7 @@ protected:
 CV_EXPORTS const char* convertTypeStr(int sdepth, int ddepth, int cn, char* buf);
 CV_EXPORTS const char* typeToStr(int t);
 CV_EXPORTS const char* memopTypeToStr(int t);
-CV_EXPORTS String kernelToStr(InputArray _kernel, int ddepth = -1);
+CV_EXPORTS String kernelToStr(InputArray _kernel, int ddepth = -1, const char * name = NULL);
 CV_EXPORTS void getPlatfomsInfo(std::vector<PlatformInfo>& platform_info);
 CV_EXPORTS int predictOptimalVectorWidth(InputArray src1, InputArray src2 = noArray(), InputArray src3 = noArray(),
                                          InputArray src4 = noArray(), InputArray src5 = noArray(), InputArray src6 = noArray(),
diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index 82d177eda4..45ae3d5124 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -1416,6 +1416,16 @@ int _InputArray::kind() const
     return flags & KIND_MASK;
 }
 
+int _InputArray::rows(int i) const
+{
+    return size(i).height;
+}
+
+int _InputArray::cols(int i) const
+{
+    return size(i).width;
+}
+
 Size _InputArray::size(int i) const
 {
     int k = kind();
@@ -2078,45 +2088,45 @@ void _OutputArray::create(Size _sz, int mtype, int i, bool allowTransposed, int
     create(2, sizes, mtype, i, allowTransposed, fixedDepthMask);
 }
 
-void _OutputArray::create(int rows, int cols, int mtype, int i, bool allowTransposed, int fixedDepthMask) const
+void _OutputArray::create(int _rows, int _cols, int mtype, int i, bool allowTransposed, int fixedDepthMask) const
 {
     int k = kind();
     if( k == MAT && i < 0 && !allowTransposed && fixedDepthMask == 0 )
     {
-        CV_Assert(!fixedSize() || ((Mat*)obj)->size.operator()() == Size(cols, rows));
+        CV_Assert(!fixedSize() || ((Mat*)obj)->size.operator()() == Size(_cols, _rows));
         CV_Assert(!fixedType() || ((Mat*)obj)->type() == mtype);
-        ((Mat*)obj)->create(rows, cols, mtype);
+        ((Mat*)obj)->create(_rows, _cols, mtype);
         return;
     }
     if( k == UMAT && i < 0 && !allowTransposed && fixedDepthMask == 0 )
     {
-        CV_Assert(!fixedSize() || ((UMat*)obj)->size.operator()() == Size(cols, rows));
+        CV_Assert(!fixedSize() || ((UMat*)obj)->size.operator()() == Size(_cols, _rows));
         CV_Assert(!fixedType() || ((UMat*)obj)->type() == mtype);
-        ((UMat*)obj)->create(rows, cols, mtype);
+        ((UMat*)obj)->create(_rows, _cols, mtype);
         return;
     }
     if( k == GPU_MAT && i < 0 && !allowTransposed && fixedDepthMask == 0 )
     {
-        CV_Assert(!fixedSize() || ((cuda::GpuMat*)obj)->size() == Size(cols, rows));
+        CV_Assert(!fixedSize() || ((cuda::GpuMat*)obj)->size() == Size(_cols, _rows));
         CV_Assert(!fixedType() || ((cuda::GpuMat*)obj)->type() == mtype);
-        ((cuda::GpuMat*)obj)->create(rows, cols, mtype);
+        ((cuda::GpuMat*)obj)->create(_rows, _cols, mtype);
         return;
     }
     if( k == OPENGL_BUFFER && i < 0 && !allowTransposed && fixedDepthMask == 0 )
     {
-        CV_Assert(!fixedSize() || ((ogl::Buffer*)obj)->size() == Size(cols, rows));
+        CV_Assert(!fixedSize() || ((ogl::Buffer*)obj)->size() == Size(_cols, _rows));
         CV_Assert(!fixedType() || ((ogl::Buffer*)obj)->type() == mtype);
-        ((ogl::Buffer*)obj)->create(rows, cols, mtype);
+        ((ogl::Buffer*)obj)->create(_rows, _cols, mtype);
         return;
     }
     if( k == CUDA_MEM && i < 0 && !allowTransposed && fixedDepthMask == 0 )
     {
-        CV_Assert(!fixedSize() || ((cuda::CudaMem*)obj)->size() == Size(cols, rows));
+        CV_Assert(!fixedSize() || ((cuda::CudaMem*)obj)->size() == Size(_cols, _rows));
         CV_Assert(!fixedType() || ((cuda::CudaMem*)obj)->type() == mtype);
-        ((cuda::CudaMem*)obj)->create(rows, cols, mtype);
+        ((cuda::CudaMem*)obj)->create(_rows, _cols, mtype);
         return;
     }
-    int sizes[] = {rows, cols};
+    int sizes[] = {_rows, _cols};
     create(2, sizes, mtype, i, allowTransposed, fixedDepthMask);
 }
 
diff --git a/modules/core/src/ocl.cpp b/modules/core/src/ocl.cpp
index c6e0c40398..a659e16c45 100644
--- a/modules/core/src/ocl.cpp
+++ b/modules/core/src/ocl.cpp
@@ -4307,7 +4307,7 @@ static std::string kerToStr(const Mat & k)
     return stream.str();
 }
 
-String kernelToStr(InputArray _kernel, int ddepth)
+String kernelToStr(InputArray _kernel, int ddepth, const char * name)
 {
     Mat kernel = _kernel.getMat().reshape(1, 1);
 
@@ -4318,13 +4318,13 @@ String kernelToStr(InputArray _kernel, int ddepth)
     if (ddepth != depth)
         kernel.convertTo(kernel, ddepth);
 
-    typedef std::string (*func_t)(const Mat &);
-    static const func_t funcs[] = { kerToStr<uchar>, kerToStr<char>, kerToStr<ushort>,kerToStr<short>,
+    typedef std::string (* func_t)(const Mat &);
+    static const func_t funcs[] = { kerToStr<uchar>, kerToStr<char>, kerToStr<ushort>, kerToStr<short>,
                                     kerToStr<int>, kerToStr<float>, kerToStr<double>, 0 };
     const func_t func = funcs[depth];
     CV_Assert(func != 0);
 
-    return cv::format(" -D COEFF=%s", func(kernel).c_str());
+    return cv::format(" -D %s=%s", name ? name : "COEFF", func(kernel).c_str());
 }
 
 #define PROCESS_SRC(src) \
diff --git a/modules/imgproc/perf/opencl/perf_filters.cpp b/modules/imgproc/perf/opencl/perf_filters.cpp
index 57b928c289..f7329e3194 100644
--- a/modules/imgproc/perf/opencl/perf_filters.cpp
+++ b/modules/imgproc/perf/opencl/perf_filters.cpp
@@ -211,7 +211,7 @@ OCL_PERF_TEST_P(SobelFixture, Sobel,
 
     OCL_TEST_CYCLE() cv::Sobel(src, dst, -1, dx, dy);
 
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 1e-6);
 }
 
 ///////////// Scharr ////////////////////////
diff --git a/modules/imgproc/src/filter.cpp b/modules/imgproc/src/filter.cpp
index ea0baf6b09..024f611ffb 100644
--- a/modules/imgproc/src/filter.cpp
+++ b/modules/imgproc/src/filter.cpp
@@ -3134,7 +3134,7 @@ template<typename ST, class CastOp, class VecOp> struct Filter2D : public BaseFi
 // b e h b e h 0 0
 // c f i c f i 0 0
 template <typename T>
-static int _prepareKernelFilter2D(std::vector<T>& data, const Mat &kernel)
+static int _prepareKernelFilter2D(std::vector<T> & data, const Mat & kernel)
 {
     Mat _kernel; kernel.convertTo(_kernel, DataDepth<T>::value);
     int size_y_aligned = ROUNDUP(kernel.rows * 2, 4);
@@ -3317,200 +3317,224 @@ static bool ocl_filter2D( InputArray _src, OutputArray _dst, int ddepth,
     return kernel.run(2, globalsize, localsize, true);
 }
 
-static bool ocl_sepRowFilter2D( UMat &src, UMat &buf, Mat &kernelX, int anchor, int borderType, bool sync)
+static bool ocl_sepRowFilter2D(const UMat & src, UMat & buf, const Mat & kernelX, int anchor,
+                               int borderType, int ddepth, bool fast8uc1)
 {
-    int type = src.type();
-    int cn = CV_MAT_CN(type);
-    int sdepth = CV_MAT_DEPTH(type);
+    int type = src.type(), cn = CV_MAT_CN(type), sdepth = CV_MAT_DEPTH(type);
+    bool doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
     Size bufSize = buf.size();
 
+    if (!doubleSupport && (sdepth == CV_64F || ddepth == CV_64F))
+        return false;
+
 #ifdef ANDROID
     size_t localsize[2] = {16, 10};
 #else
     size_t localsize[2] = {16, 16};
 #endif
+
     size_t globalsize[2] = {DIVUP(bufSize.width, localsize[0]) * localsize[0], DIVUP(bufSize.height, localsize[1]) * localsize[1]};
-    if (CV_8U == sdepth)
-    {
-        switch (cn)
-        {
-        case 1:
-            globalsize[0] = DIVUP((bufSize.width + 3) >> 2, localsize[0]) * localsize[0];
-            break;
-        case 2:
-            globalsize[0] = DIVUP((bufSize.width + 1) >> 1, localsize[0]) * localsize[0];
-            break;
-        case 4:
-            globalsize[0] = DIVUP(bufSize.width, localsize[0]) * localsize[0];
-            break;
-        }
-    }
+    if (fast8uc1)
+        globalsize[0] = DIVUP((bufSize.width + 3) >> 2, localsize[0]) * localsize[0];
 
-    int radiusX = anchor;
-    int radiusY = (int)((buf.rows - src.rows) >> 1);
+    int radiusX = anchor, radiusY = (buf.rows - src.rows) >> 1;
 
-    bool isIsolatedBorder = (borderType & BORDER_ISOLATED) != 0;
-    const char* btype = NULL;
-    switch (borderType & ~BORDER_ISOLATED)
-    {
-    case BORDER_CONSTANT:
-        btype = "BORDER_CONSTANT";
-        break;
-    case BORDER_REPLICATE:
-        btype = "BORDER_REPLICATE";
-        break;
-    case BORDER_REFLECT:
-        btype = "BORDER_REFLECT";
-        break;
-    case BORDER_WRAP:
-        btype = "BORDER_WRAP";
-        break;
-    case BORDER_REFLECT101:
-        btype = "BORDER_REFLECT_101";
-        break;
-    default:
-        return false;
-    }
+    bool isolated = (borderType & BORDER_ISOLATED) != 0;
+    const char * const borderMap[] = { "BORDER_CONSTANT", "BORDER_REPLICATE", "BORDER_REFLECT", "BORDER_WRAP", "BORDER_REFLECT_101" },
+        * const btype = borderMap[borderType & ~BORDER_ISOLATED];
 
     bool extra_extrapolation = src.rows < (int)((-radiusY + globalsize[1]) >> 1) + 1;
     extra_extrapolation |= src.rows < radiusY;
     extra_extrapolation |= src.cols < (int)((-radiusX + globalsize[0] + 8 * localsize[0] + 3) >> 1) + 1;
     extra_extrapolation |= src.cols < radiusX;
 
-    cv::String build_options = cv::format("-D RADIUSX=%d -D LSIZE0=%d -D LSIZE1=%d -D CN=%d -D %s -D %s -D %s",
-        radiusX, (int)localsize[0], (int)localsize[1], cn,
-        btype,
-        extra_extrapolation ? "EXTRA_EXTRAPOLATION" : "NO_EXTRA_EXTRAPOLATION",
-        isIsolatedBorder ? "BORDER_ISOLATED" : "NO_BORDER_ISOLATED");
+    char cvt[40];
+    cv::String build_options = cv::format("-D RADIUSX=%d -D LSIZE0=%d -D LSIZE1=%d -D CN=%d -D %s -D %s -D %s"
+                                          " -D srcT=%s -D dstT=%s -D convertToDstT=%s -D srcT1=%s -D dstT1=%s%s",
+                                          radiusX, (int)localsize[0], (int)localsize[1], cn, btype,
+                                          extra_extrapolation ? "EXTRA_EXTRAPOLATION" : "NO_EXTRA_EXTRAPOLATION",
+                                          isolated ? "BORDER_ISOLATED" : "NO_BORDER_ISOLATED",
+                                          ocl::typeToStr(type), ocl::typeToStr(CV_32FC(cn)),
+                                          ocl::convertTypeStr(sdepth, CV_32F, cn, cvt),
+                                          ocl::typeToStr(sdepth), ocl::typeToStr(CV_32F),
+                                          doubleSupport ? " -D DOUBLE_SUPPORT" : "");
     build_options += ocl::kernelToStr(kernelX, CV_32F);
 
     Size srcWholeSize; Point srcOffset;
     src.locateROI(srcWholeSize, srcOffset);
 
-    std::stringstream strKernel;
-    strKernel << "row_filter";
-    if (-1 != cn)
-        strKernel << "_C" << cn;
-    if (-1 != sdepth)
-        strKernel << "_D" << sdepth;
+    String kernelName("row_filter");
+    if (fast8uc1)
+        kernelName += "_C1_D0";
 
-    ocl::Kernel kernelRow;
-    if (!kernelRow.create(strKernel.str().c_str(), cv::ocl::imgproc::filterSepRow_oclsrc,
-                          build_options))
+    ocl::Kernel k(kernelName.c_str(), cv::ocl::imgproc::filterSepRow_oclsrc,
+                  build_options);
+    if (k.empty())
         return false;
 
-    int idxArg = 0;
-    idxArg = kernelRow.set(idxArg, ocl::KernelArg::PtrReadOnly(src));
-    idxArg = kernelRow.set(idxArg, (int)(src.step / src.elemSize()));
+    if (fast8uc1)
+        k.args(ocl::KernelArg::PtrReadOnly(src), (int)(src.step / src.elemSize()), srcOffset.x,
+               srcOffset.y, src.cols, src.rows, srcWholeSize.width, srcWholeSize.height,
+               ocl::KernelArg::PtrWriteOnly(buf), (int)(buf.step / buf.elemSize()),
+               buf.cols, buf.rows, radiusY);
+    else
+        k.args(ocl::KernelArg::PtrReadOnly(src), (int)src.step, srcOffset.x,
+               srcOffset.y, src.cols, src.rows, srcWholeSize.width, srcWholeSize.height,
+               ocl::KernelArg::PtrWriteOnly(buf), (int)buf.step, buf.cols, buf.rows, radiusY);
 
-    idxArg = kernelRow.set(idxArg, srcOffset.x);
-    idxArg = kernelRow.set(idxArg, srcOffset.y);
-    idxArg = kernelRow.set(idxArg, src.cols);
-    idxArg = kernelRow.set(idxArg, src.rows);
-    idxArg = kernelRow.set(idxArg, srcWholeSize.width);
-    idxArg = kernelRow.set(idxArg, srcWholeSize.height);
-
-    idxArg = kernelRow.set(idxArg, ocl::KernelArg::PtrWriteOnly(buf));
-    idxArg = kernelRow.set(idxArg, (int)(buf.step / buf.elemSize()));
-    idxArg = kernelRow.set(idxArg, buf.cols);
-    idxArg = kernelRow.set(idxArg, buf.rows);
-    idxArg = kernelRow.set(idxArg, radiusY);
-
-    return kernelRow.run(2, globalsize, localsize, sync);
+    return k.run(2, globalsize, localsize, false);
 }
 
-static bool ocl_sepColFilter2D(const UMat &buf, UMat &dst, Mat &kernelY, int anchor, bool sync)
+static bool ocl_sepColFilter2D(const UMat & buf, UMat & dst, const Mat & kernelY, int anchor)
 {
+    bool doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
+    if (dst.depth() == CV_64F && !doubleSupport)
+        return false;
+
 #ifdef ANDROID
-    size_t localsize[2] = {16, 10};
+    size_t localsize[2] = { 16, 10 };
 #else
-    size_t localsize[2] = {16, 16};
+    size_t localsize[2] = { 16, 16 };
 #endif
-    size_t globalsize[2] = {0, 0};
+    size_t globalsize[2] = { 0, 0 };
 
     int dtype = dst.type(), cn = CV_MAT_CN(dtype), ddepth = CV_MAT_DEPTH(dtype);
     Size sz = dst.size();
 
     globalsize[1] = DIVUP(sz.height, localsize[1]) * localsize[1];
-
-    if (dtype == CV_8UC2)
-        globalsize[0] = DIVUP((sz.width + 1) / 2, localsize[0]) * localsize[0];
-    else
-        globalsize[0] = DIVUP(sz.width, localsize[0]) * localsize[0];
+    globalsize[0] = DIVUP(sz.width, localsize[0]) * localsize[0];
 
     char cvt[40];
-    cv::String build_options = cv::format("-D RADIUSY=%d -D LSIZE0=%d -D LSIZE1=%d -D CN=%d -D GENTYPE_SRC=%s -D GENTYPE_DST=%s -D convert_to_DST=%s",
-                    anchor, (int)localsize[0], (int)localsize[1], cn, ocl::typeToStr(buf.type()),
-                                          ocl::typeToStr(dtype), ocl::convertTypeStr(CV_32F, ddepth, cn, cvt));
+    cv::String build_options = cv::format("-D RADIUSY=%d -D LSIZE0=%d -D LSIZE1=%d -D CN=%d"
+                                          " -D srcT=%s -D dstT=%s -D convertToDstT=%s"
+                                          " -D srcT1=%s -D dstT1=%s%s",
+                                          anchor, (int)localsize[0], (int)localsize[1], cn,
+                                          ocl::typeToStr(buf.type()), ocl::typeToStr(dtype),
+                                          ocl::convertTypeStr(CV_32F, ddepth, cn, cvt),
+                                          ocl::typeToStr(CV_32F), ocl::typeToStr(ddepth),
+                                          doubleSupport ? " -D DOUBLE_SUPPORT" : "");
     build_options += ocl::kernelToStr(kernelY, CV_32F);
 
-    ocl::Kernel kernelCol;
-    if (!kernelCol.create("col_filter", cv::ocl::imgproc::filterSepCol_oclsrc, build_options))
+    ocl::Kernel k("col_filter", cv::ocl::imgproc::filterSepCol_oclsrc,
+                  build_options);
+    if (k.empty())
         return false;
 
-    int idxArg = 0;
-    idxArg = kernelCol.set(idxArg, ocl::KernelArg::PtrReadOnly(buf));
-    idxArg = kernelCol.set(idxArg, (int)(buf.step / buf.elemSize()));
-    idxArg = kernelCol.set(idxArg, buf.cols);
-    idxArg = kernelCol.set(idxArg, buf.rows);
+    k.args(ocl::KernelArg::ReadOnly(buf), ocl::KernelArg::WriteOnly(dst));
 
-    idxArg = kernelCol.set(idxArg, ocl::KernelArg::PtrWriteOnly(dst));
-    idxArg = kernelCol.set(idxArg, (int)(dst.offset / dst.elemSize()));
-    idxArg = kernelCol.set(idxArg, (int)(dst.step / dst.elemSize()));
-    idxArg = kernelCol.set(idxArg, dst.cols);
-    idxArg = kernelCol.set(idxArg, dst.rows);
+    return k.run(2, globalsize, localsize, false);
+}
 
-    return kernelCol.run(2, globalsize, localsize, sync);
+const int optimizedSepFilterLocalSize = 16;
+
+static bool ocl_sepFilter2D_SinglePass(InputArray _src, OutputArray _dst,
+                                       Mat row_kernel, Mat col_kernel,
+                                       int borderType, int ddepth)
+{
+    Size size = _src.size(), wholeSize;
+    Point origin;
+    int stype = _src.type(), sdepth = CV_MAT_DEPTH(stype), cn = CV_MAT_CN(stype),
+            esz = CV_ELEM_SIZE(stype), wdepth = std::max(std::max(sdepth, ddepth), CV_32F),
+            dtype = CV_MAKE_TYPE(ddepth, cn);
+    size_t src_step = _src.step(), src_offset = _src.offset();
+    bool doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
+
+    if ((src_offset % src_step) % esz != 0 || (!doubleSupport && (sdepth == CV_64F || ddepth == CV_64F)) ||
+            !(borderType == BORDER_CONSTANT || borderType == BORDER_REPLICATE ||
+              borderType == BORDER_REFLECT || borderType == BORDER_WRAP ||
+              borderType == BORDER_REFLECT_101))
+        return false;
+
+    size_t lt2[2] = { optimizedSepFilterLocalSize, optimizedSepFilterLocalSize };
+    size_t gt2[2] = { lt2[0] * (1 + (size.width - 1) / lt2[0]), lt2[1] * (1 + (size.height - 1) / lt2[1]) };
+
+    char cvt[2][40];
+    const char * const borderMap[] = { "BORDER_CONSTANT", "BORDER_REPLICATE", "BORDER_REFLECT", "BORDER_WRAP",
+                                       "BORDER_REFLECT_101" };
+
+    String opts = cv::format("-D BLK_X=%d -D BLK_Y=%d -D RADIUSX=%d -D RADIUSY=%d%s%s"
+                             " -D srcT=%s -D convertToWT=%s -D WT=%s -D dstT=%s -D convertToDstT=%s"
+                             " -D %s -D srcT1=%s -D dstT1=%s -D CN=%d", (int)lt2[0], (int)lt2[1],
+                             row_kernel.cols / 2, col_kernel.cols / 2,
+                             ocl::kernelToStr(row_kernel, CV_32F, "KERNEL_MATRIX_X").c_str(),
+                             ocl::kernelToStr(col_kernel, CV_32F, "KERNEL_MATRIX_Y").c_str(),
+                             ocl::typeToStr(stype), ocl::convertTypeStr(sdepth, wdepth, cn, cvt[0]),
+                             ocl::typeToStr(CV_MAKE_TYPE(wdepth, cn)), ocl::typeToStr(dtype),
+                             ocl::convertTypeStr(wdepth, ddepth, cn, cvt[1]), borderMap[borderType],
+                             ocl::typeToStr(sdepth), ocl::typeToStr(ddepth), cn);
+
+    ocl::Kernel k("sep_filter", ocl::imgproc::filterSep_singlePass_oclsrc, opts);
+    if (k.empty())
+        return false;
+
+    UMat src = _src.getUMat();
+    _dst.create(size, dtype);
+    UMat dst = _dst.getUMat();
+
+    int src_offset_x = static_cast<int>((src_offset % src_step) / esz);
+    int src_offset_y = static_cast<int>(src_offset / src_step);
+
+    src.locateROI(wholeSize, origin);
+
+    k.args(ocl::KernelArg::PtrReadOnly(src), (int)src_step, src_offset_x, src_offset_y,
+           wholeSize.height, wholeSize.width, ocl::KernelArg::WriteOnly(dst));
+
+    return k.run(2, gt2, lt2, false);
 }
 
 static bool ocl_sepFilter2D( InputArray _src, OutputArray _dst, int ddepth,
                       InputArray _kernelX, InputArray _kernelY, Point anchor,
                       double delta, int borderType )
 {
+    const ocl::Device & d = ocl::Device::getDefault();
+    Size imgSize = _src.size();
+
     if (abs(delta)> FLT_MIN)
         return false;
 
-    int type = _src.type();
-    if ( !( (type == CV_8UC1 || type == CV_8UC4 || type == CV_32FC1 || type == CV_32FC4) &&
-            (ddepth == CV_32F || ddepth == CV_16S || ddepth == CV_8U || ddepth < 0) ) )
+    int type = _src.type(), sdepth = CV_MAT_DEPTH(type), cn = CV_MAT_CN(type);
+    if (cn > 4)
         return false;
 
-    int cn = CV_MAT_CN(type);
-
     Mat kernelX = _kernelX.getMat().reshape(1, 1);
-    if (1 != (kernelX.cols % 2))
+    if (kernelX.cols % 2 != 1)
         return false;
     Mat kernelY = _kernelY.getMat().reshape(1, 1);
-    if (1 != (kernelY.cols % 2))
+    if (kernelY.cols % 2 != 1)
         return false;
 
-    int sdepth = CV_MAT_DEPTH(type);
-    if( anchor.x < 0 )
-        anchor.x = kernelX.cols >> 1;
-    if( anchor.y < 0 )
-        anchor.y = kernelY.cols >> 1;
-
-    if( ddepth < 0 )
+    if (ddepth < 0)
         ddepth = sdepth;
 
+    CV_OCL_RUN_(kernelY.cols <= 21 && kernelX.cols <= 21 &&
+                imgSize.width > optimizedSepFilterLocalSize + (kernelX.cols >> 1) &&
+                imgSize.height > optimizedSepFilterLocalSize + (kernelY.cols >> 1) &&
+                (!(borderType & BORDER_ISOLATED) || _src.offset() == 0) && anchor == Point(-1, -1) &&
+                (d.isIntel() || (d.isAMD() && !d.hostUnifiedMemory())),
+                ocl_sepFilter2D_SinglePass(_src, _dst, kernelX, kernelY, borderType, ddepth), true)
+
+    if (anchor.x < 0)
+        anchor.x = kernelX.cols >> 1;
+    if (anchor.y < 0)
+        anchor.y = kernelY.cols >> 1;
+
     UMat src = _src.getUMat();
     Size srcWholeSize; Point srcOffset;
     src.locateROI(srcWholeSize, srcOffset);
-    if ( (0 != (srcOffset.x % 4))   ||
-         (0 != (src.cols % 4))      ||
-         (0 != ((src.step / src.elemSize()) % 4))
-       )
-        return false;
+
+    bool fast8uc1 = type == CV_8UC1 && srcOffset.x % 4 == 0 &&
+            src.cols % 4 == 0 && src.step % 4 == 0;
 
     Size srcSize = src.size();
     Size bufSize(srcSize.width, srcSize.height + kernelY.cols - 1);
-    UMat buf; buf.create(bufSize, CV_MAKETYPE(CV_32F, cn));
-    if (!ocl_sepRowFilter2D(src, buf, kernelX, anchor.x, borderType, false))
+    UMat buf(bufSize, CV_32FC(cn));
+    if (!ocl_sepRowFilter2D(src, buf, kernelX, anchor.x, borderType, ddepth, fast8uc1))
         return false;
 
     _dst.create(srcSize, CV_MAKETYPE(ddepth, cn));
     UMat dst = _dst.getUMat();
-    return ocl_sepColFilter2D(buf, dst, kernelY, anchor.y, false);
+
+    return ocl_sepColFilter2D(buf, dst, kernelY, anchor.y);
 }
 
 #endif
diff --git a/modules/imgproc/src/opencl/filterSepCol.cl b/modules/imgproc/src/opencl/filterSepCol.cl
index 30a2221cf1..f5d270cf42 100644
--- a/modules/imgproc/src/opencl/filterSepCol.cl
+++ b/modules/imgproc/src/opencl/filterSepCol.cl
@@ -34,47 +34,36 @@
 //
 //
 
+#ifdef DOUBLE_SUPPORT
+#ifdef cl_amd_fp64
+#pragma OPENCL EXTENSION cl_amd_fp64:enable
+#elif defined (cl_khr_fp64)
+#pragma OPENCL EXTENSION cl_khr_fp64:enable
+#endif
+#endif
+
 #define READ_TIMES_COL ((2*(RADIUSY+LSIZE1)-1)/LSIZE1)
 #define RADIUS 1
-#if CN ==1
-#define ALIGN (((RADIUS)+3)>>2<<2)
-#elif CN==2
-#define ALIGN (((RADIUS)+1)>>1<<1)
-#elif CN==3
-#define ALIGN (((RADIUS)+3)>>2<<2)
-#elif CN==4
-#define ALIGN (RADIUS)
-#define READ_TIMES_ROW ((2*(RADIUS+LSIZE0)-1)/LSIZE0)
-#endif
 
 #define noconvert
 
-/**********************************************************************************
-These kernels are written for separable filters such as Sobel, Scharr, GaussianBlur.
-Now(6/29/2011) the kernels only support 8U data type and the anchor of the convovle
-kernel must be in the center. ROI is not supported either.
-Each kernels read 4 elements(not 4 pixels), save them to LDS and read the data needed
-from LDS to calculate the result.
-The length of the convovle kernel supported is only related to the MAX size of LDS,
-which is HW related.
-Niko
-6/29/2011
-The info above maybe obsolete.
-***********************************************************************************/
+#if CN != 3
+#define loadpix(addr) *(__global const srcT *)(addr)
+#define storepix(val, addr)  *(__global dstT *)(addr) = val
+#define SRCSIZE (int)sizeof(srcT)
+#define DSTSIZE (int)sizeof(dstT)
+#else
+#define loadpix(addr)  vload3(0, (__global const srcT1 *)(addr))
+#define storepix(val, addr) vstore3(val, 0, (__global dstT1 *)(addr))
+#define SRCSIZE (int)sizeof(srcT1)*3
+#define DSTSIZE (int)sizeof(dstT1)*3
+#endif
 
 #define DIG(a) a,
 __constant float mat_kernel[] = { COEFF };
 
-__kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void col_filter
-                        (__global const GENTYPE_SRC * restrict src,
-                         const int src_step_in_pixel,
-                         const int src_whole_cols,
-                         const int src_whole_rows,
-                         __global GENTYPE_DST * dst,
-                         const int dst_offset_in_pixel,
-                         const int dst_step_in_pixel,
-                         const int dst_cols,
-                         const int dst_rows)
+__kernel void col_filter(__global const uchar * src, int src_step, int src_offset, int src_whole_rows, int src_whole_cols,
+                         __global uchar * dst, int dst_step, int dst_offset, int dst_rows, int dst_cols)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
@@ -82,38 +71,38 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void col_filter
     int l_x = get_local_id(0);
     int l_y = get_local_id(1);
 
-    int start_addr = mad24(y, src_step_in_pixel, x);
-    int end_addr = mad24(src_whole_rows - 1, src_step_in_pixel, src_whole_cols);
+    int start_addr = mad24(y, src_step, x * SRCSIZE);
+    int end_addr = mad24(src_whole_rows - 1, src_step, src_whole_cols * SRCSIZE);
 
-    int i;
-    GENTYPE_SRC sum, temp[READ_TIMES_COL];
-    __local GENTYPE_SRC LDS_DAT[LSIZE1 * READ_TIMES_COL][LSIZE0 + 1];
+    srcT sum, temp[READ_TIMES_COL];
+    __local srcT LDS_DAT[LSIZE1 * READ_TIMES_COL][LSIZE0 + 1];
 
-    //read pixels from src
-    for(i = 0;i<READ_TIMES_COL;i++)
+    // read pixels from src
+    for (int i = 0; i < READ_TIMES_COL; ++i)
     {
-        int current_addr = start_addr+i*LSIZE1*src_step_in_pixel;
+        int current_addr = mad24(i, LSIZE1 * src_step, start_addr);
         current_addr = current_addr < end_addr ? current_addr : 0;
-        temp[i] = src[current_addr];
-    }
-    //save pixels to lds
-    for(i = 0;i<READ_TIMES_COL;i++)
-    {
-        LDS_DAT[l_y+i*LSIZE1][l_x] = temp[i];
+        temp[i] = loadpix(src + current_addr);
     }
+
+    // save pixels to lds
+    for (int i = 0; i < READ_TIMES_COL; ++i)
+        LDS_DAT[mad24(i, LSIZE1, l_y)][l_x] = temp[i];
     barrier(CLK_LOCAL_MEM_FENCE);
-    //read pixels from lds and calculate the result
-    sum = LDS_DAT[l_y+RADIUSY][l_x]*mat_kernel[RADIUSY];
-    for(i=1;i<=RADIUSY;i++)
+
+    // read pixels from lds and calculate the result
+    sum = LDS_DAT[l_y + RADIUSY][l_x] * mat_kernel[RADIUSY];
+    for (int i = 1; i <= RADIUSY; ++i)
     {
-        temp[0]=LDS_DAT[l_y+RADIUSY-i][l_x];
-        temp[1]=LDS_DAT[l_y+RADIUSY+i][l_x];
-        sum += temp[0] * mat_kernel[RADIUSY-i]+temp[1] * mat_kernel[RADIUSY+i];
+        temp[0] = LDS_DAT[l_y + RADIUSY - i][l_x];
+        temp[1] = LDS_DAT[l_y + RADIUSY + i][l_x];
+        sum += mad(temp[0], mat_kernel[RADIUSY - i], temp[1] * mat_kernel[RADIUSY + i]);
     }
-    //write the result to dst
-    if((x<dst_cols) & (y<dst_rows))
+
+    // write the result to dst
+    if (x < dst_cols && y < dst_rows)
     {
-        start_addr = mad24(y, dst_step_in_pixel, x + dst_offset_in_pixel);
-        dst[start_addr] = convert_to_DST(sum);
+        start_addr = mad24(y, dst_step, mad24(DSTSIZE, x, dst_offset));
+        storepix(convertToDstT(sum), dst + start_addr);
     }
 }
diff --git a/modules/imgproc/src/opencl/filterSepRow.cl b/modules/imgproc/src/opencl/filterSepRow.cl
index d0623f5905..726de448e4 100644
--- a/modules/imgproc/src/opencl/filterSepRow.cl
+++ b/modules/imgproc/src/opencl/filterSepRow.cl
@@ -34,41 +34,37 @@
 //
 //
 
-#define READ_TIMES_ROW ((2*(RADIUSX+LSIZE0)-1)/LSIZE0) //for c4 only
-#define READ_TIMES_COL ((2*(RADIUSY+LSIZE1)-1)/LSIZE1)
-//#pragma OPENCL EXTENSION cl_amd_printf : enable
-#define RADIUS 1
-#if CN ==1
-#define ALIGN (((RADIUS)+3)>>2<<2)
-#elif CN==2
-#define ALIGN (((RADIUS)+1)>>1<<1)
-#elif CN==3
-#define ALIGN (((RADIUS)+3)>>2<<2)
-#elif CN==4
-#define ALIGN (RADIUS)
+#ifdef DOUBLE_SUPPORT
+#ifdef cl_amd_fp64
+#pragma OPENCL EXTENSION cl_amd_fp64:enable
+#elif defined (cl_khr_fp64)
+#pragma OPENCL EXTENSION cl_khr_fp64:enable
+#endif
 #endif
 
+#define READ_TIMES_ROW ((2*(RADIUSX+LSIZE0)-1)/LSIZE0) //for c4 only
+#define RADIUS 1
+
 #ifdef BORDER_REPLICATE
-//BORDER_REPLICATE:     aaaaaa|abcdefgh|hhhhhhh
+// BORDER_REPLICATE: aaaaaa|abcdefgh|hhhhhhh
 #define ADDR_L(i, l_edge, r_edge)  ((i) <  (l_edge) ? (l_edge)   : (i))
 #define ADDR_R(i, r_edge, addr)    ((i) >= (r_edge) ? (r_edge)-1 : (addr))
 #endif
 
 #ifdef BORDER_REFLECT
-//BORDER_REFLECT:       fedcba|abcdefgh|hgfedcb
+// BORDER_REFLECT: fedcba|abcdefgh|hgfedcb
 #define ADDR_L(i, l_edge, r_edge)  ((i) <  (l_edge) ? -(i)-1               : (i))
 #define ADDR_R(i, r_edge, addr)    ((i) >= (r_edge) ? -(i)-1+((r_edge)<<1) : (addr))
 #endif
 
 #ifdef BORDER_REFLECT_101
-//BORDER_REFLECT_101:   gfedcb|abcdefgh|gfedcba
+// BORDER_REFLECT_101: gfedcb|abcdefgh|gfedcba
 #define ADDR_L(i, l_edge, r_edge)  ((i) <  (l_edge) ? -(i)                 : (i))
 #define ADDR_R(i, r_edge, addr)    ((i) >= (r_edge) ? -(i)-2+((r_edge)<<1) : (addr))
 #endif
 
-//blur function does not support BORDER_WRAP
 #ifdef BORDER_WRAP
-//BORDER_WRAP:          cdefgh|abcdefgh|abcdefg
+// BORDER_WRAP: cdefgh|abcdefgh|abcdefg
 #define ADDR_L(i, l_edge, r_edge)  ((i) <  (l_edge) ? (i)+(r_edge) : (i))
 #define ADDR_R(i, r_edge, addr)    ((i) >= (r_edge) ? (i)-(r_edge) : (addr))
 #endif
@@ -127,65 +123,56 @@
     #endif //BORDER_CONSTANT
 #endif //EXTRA_EXTRAPOLATION
 
-/**********************************************************************************
-These kernels are written for separable filters such as Sobel, Scharr, GaussianBlur.
-Now(6/29/2011) the kernels only support 8U data type and the anchor of the convovle
-kernel must be in the center. ROI is not supported either.
-For channels =1,2,4, each kernels read 4 elements(not 4 pixels), and for channels =3,
-the kernel read 4 pixels, save them to LDS and read the data needed from LDS to
-calculate the result.
-The length of the convovle kernel supported is related to the LSIZE0 and the MAX size
-of LDS, which is HW related.
-For channels = 1,3 the RADIUS is no more than LSIZE0*2
-For channels = 2, the RADIUS is no more than LSIZE0
-For channels = 4, arbitary RADIUS is supported unless the LDS is not enough
-Niko
-6/29/2011
-The info above maybe obsolete.
-***********************************************************************************/
+#define noconvert
+
+#if CN != 3
+#define loadpix(addr) *(__global const srcT *)(addr)
+#define storepix(val, addr)  *(__global dstT *)(addr) = val
+#define SRCSIZE (int)sizeof(srcT)
+#define DSTSIZE (int)sizeof(dstT)
+#else
+#define loadpix(addr)  vload3(0, (__global const srcT1 *)(addr))
+#define storepix(val, addr) vstore3(val, 0, (__global dstT1 *)(addr))
+#define SRCSIZE (int)sizeof(srcT1)*3
+#define DSTSIZE (int)sizeof(dstT1)*3
+#endif
 
 #define DIG(a) a,
 __constant float mat_kernel[] = { COEFF };
 
-__kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_C1_D0
-    (__global uchar * restrict src,
-     int src_step_in_pixel,
-     int src_offset_x, int src_offset_y,
-     int src_cols, int src_rows,
-     int src_whole_cols, int src_whole_rows,
-     __global float * dst,
-     int dst_step_in_pixel,
-     int dst_cols, int dst_rows,
-     int radiusy)
+__kernel void row_filter_C1_D0(__global const uchar * src, int src_step_in_pixel, int src_offset_x, int src_offset_y,
+                               int src_cols, int src_rows, int src_whole_cols, int src_whole_rows,
+                               __global float * dst, int dst_step_in_pixel, int dst_cols, int dst_rows,
+                               int radiusy)
 {
     int x = get_global_id(0)<<2;
     int y = get_global_id(1);
     int l_x = get_local_id(0);
     int l_y = get_local_id(1);
 
-    int start_x = x+src_offset_x - RADIUSX & 0xfffffffc;
+    int start_x = x + src_offset_x - RADIUSX & 0xfffffffc;
     int offset = src_offset_x - RADIUSX & 3;
     int start_y = y + src_offset_y - radiusy;
     int start_addr = mad24(start_y, src_step_in_pixel, start_x);
-    int i;
+
     float4 sum;
     uchar4 temp[READ_TIMES_ROW];
 
-    __local uchar4 LDS_DAT[LSIZE1][READ_TIMES_ROW*LSIZE0+1];
+    __local uchar4 LDS_DAT[LSIZE1][READ_TIMES_ROW * LSIZE0 + 1];
 #ifdef BORDER_CONSTANT
     int end_addr = mad24(src_whole_rows - 1, src_step_in_pixel, src_whole_cols);
 
     // read pixels from src
-    for (i = 0; i < READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
-        int current_addr = start_addr+i*LSIZE0*4;
-        current_addr = ((current_addr < end_addr) && (current_addr > 0)) ? current_addr : 0;
-        temp[i] = *(__global uchar4*)&src[current_addr];
+        int current_addr = mad24(i, LSIZE0 << 2, start_addr);
+        current_addr = current_addr < end_addr && current_addr > 0 ? current_addr : 0;
+        temp[i] = *(__global const uchar4 *)&src[current_addr];
     }
 
     // judge if read out of boundary
 #ifdef BORDER_ISOLATED
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
         temp[i].x = ELEM(start_x+i*LSIZE0*4,   src_offset_x, src_offset_x + src_cols, 0,         temp[i].x);
         temp[i].y = ELEM(start_x+i*LSIZE0*4+1, src_offset_x, src_offset_x + src_cols, 0,         temp[i].y);
@@ -194,7 +181,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
         temp[i]   = ELEM(start_y,              src_offset_y, src_offset_y + src_rows, (uchar4)0, temp[i]);
     }
 #else
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
         temp[i].x = ELEM(start_x+i*LSIZE0*4,   0, src_whole_cols, 0,         temp[i].x);
         temp[i].y = ELEM(start_x+i*LSIZE0*4+1, 0, src_whole_cols, 0,         temp[i].y);
@@ -209,16 +196,15 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
 #else
     int not_all_in_range = (start_x<0) | (start_x + READ_TIMES_ROW*LSIZE0*4+4>src_whole_cols)| (start_y<0) | (start_y >= src_whole_rows);
 #endif
-    int4 index[READ_TIMES_ROW];
-    int4 addr;
+    int4 index[READ_TIMES_ROW], addr;
     int s_y;
 
     if (not_all_in_range)
     {
         // judge if read out of boundary
-        for (i = 0; i < READ_TIMES_ROW; i++)
+        for (int i = 0; i < READ_TIMES_ROW; ++i)
         {
-            index[i] = (int4)(start_x+i*LSIZE0*4) + (int4)(0, 1, 2, 3);
+            index[i] = (int4)(mad24(i, LSIZE0 << 2, start_x)) + (int4)(0, 1, 2, 3);
 #ifdef BORDER_ISOLATED
             EXTRAPOLATE(index[i].x, src_offset_x, src_offset_x + src_cols);
             EXTRAPOLATE(index[i].y, src_offset_x, src_offset_x + src_cols);
@@ -231,6 +217,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
             EXTRAPOLATE(index[i].w, 0, src_whole_cols);
 #endif
         }
+
         s_y = start_y;
 #ifdef BORDER_ISOLATED
         EXTRAPOLATE(s_y, src_offset_y, src_offset_y + src_rows);
@@ -239,9 +226,9 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
 #endif
 
         // read pixels from src
-        for (i = 0; i<READ_TIMES_ROW; i++)
+        for (int i = 0; i < READ_TIMES_ROW; ++i)
         {
-            addr = mad24((int4)s_y,(int4)src_step_in_pixel,index[i]);
+            addr = mad24((int4)s_y, (int4)src_step_in_pixel, index[i]);
             temp[i].x = src[addr.x];
             temp[i].y = src[addr.y];
             temp[i].z = src[addr.z];
@@ -251,26 +238,26 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
     else
     {
         // read pixels from src
-        for (i = 0; i<READ_TIMES_ROW; i++)
-            temp[i] = *(__global uchar4*)&src[start_addr+i*LSIZE0*4];
+        for (int i = 0; i < READ_TIMES_ROW; ++i)
+            temp[i] = *(__global uchar4*)&src[mad24(i, LSIZE0 << 2, start_addr)];
     }
 #endif //BORDER_CONSTANT
 
     // save pixels to lds
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        LDS_DAT[l_y][l_x+i*LSIZE0]=temp[i];
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
+        LDS_DAT[l_y][mad24(i, LSIZE0, l_x)] = temp[i];
     barrier(CLK_LOCAL_MEM_FENCE);
 
     // read pixels from lds and calculate the result
-    sum =convert_float4(vload4(0,(__local uchar*)&LDS_DAT[l_y][l_x]+RADIUSX+offset))*mat_kernel[RADIUSX];
-    for (i=1; i<=RADIUSX; i++)
+    sum = convert_float4(vload4(0,(__local uchar *)&LDS_DAT[l_y][l_x]+RADIUSX+offset)) * mat_kernel[RADIUSX];
+    for (int i = 1; i <= RADIUSX; ++i)
     {
         temp[0] = vload4(0, (__local uchar*)&LDS_DAT[l_y][l_x] + RADIUSX + offset - i);
         temp[1] = vload4(0, (__local uchar*)&LDS_DAT[l_y][l_x] + RADIUSX + offset + i);
-        sum += convert_float4(temp[0]) * mat_kernel[RADIUSX-i] + convert_float4(temp[1]) * mat_kernel[RADIUSX+i];
+        sum += mad(convert_float4(temp[0]), mat_kernel[RADIUSX-i], convert_float4(temp[1]) * mat_kernel[RADIUSX + i]);
     }
 
-    start_addr = mad24(y,dst_step_in_pixel,x);
+    start_addr = mad24(y, dst_step_in_pixel, x);
 
     // write the result to dst
     if ((x+3<dst_cols) & (y<dst_rows))
@@ -290,63 +277,58 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
         dst[start_addr] = sum.x;
 }
 
-__kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_C4_D0
-    (__global uchar4 * restrict src,
-     int src_step_in_pixel,
-     int src_offset_x, int src_offset_y,
-     int src_cols, int src_rows,
-     int src_whole_cols, int src_whole_rows,
-     __global float4 * dst,
-     int dst_step_in_pixel,
-     int dst_cols, int dst_rows,
-     int radiusy)
+__kernel void row_filter(__global const uchar * src, int src_step, int src_offset_x, int src_offset_y,
+                         int src_cols, int src_rows, int src_whole_cols, int src_whole_rows,
+                         __global uchar * dst, int dst_step, int dst_cols, int dst_rows,
+                         int radiusy)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
     int l_x = get_local_id(0);
     int l_y = get_local_id(1);
-    int start_x = x+src_offset_x-RADIUSX;
-    int start_y = y+src_offset_y-radiusy;
-    int start_addr = mad24(start_y,src_step_in_pixel,start_x);
-    int i;
-    float4 sum;
-    uchar4 temp[READ_TIMES_ROW];
 
-    __local uchar4 LDS_DAT[LSIZE1][READ_TIMES_ROW*LSIZE0+1];
+    int start_x = x + src_offset_x - RADIUSX;
+    int start_y = y + src_offset_y - radiusy;
+    int start_addr = mad24(start_y, src_step, start_x * SRCSIZE);
+
+    dstT sum;
+    srcT temp[READ_TIMES_ROW];
+
+    __local srcT LDS_DAT[LSIZE1][READ_TIMES_ROW * LSIZE0 + 1];
 #ifdef BORDER_CONSTANT
-    int end_addr = mad24(src_whole_rows - 1,src_step_in_pixel,src_whole_cols);
+    int end_addr = mad24(src_whole_rows - 1, src_step, src_whole_cols * SRCSIZE);
 
     // read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; i++)
     {
-        int current_addr = start_addr+i*LSIZE0;
-        current_addr = ((current_addr < end_addr) && (current_addr > 0)) ? current_addr : 0;
-        temp[i] = src[current_addr];
+        int current_addr = mad24(i, LSIZE0 * SRCSIZE, start_addr);
+        current_addr = current_addr < end_addr && current_addr >= 0 ? current_addr : 0;
+        temp[i] = loadpix(src + current_addr);
     }
 
-    //judge if read out of boundary
+    // judge if read out of boundary
 #ifdef BORDER_ISOLATED
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
-        temp[i]= ELEM(start_x+i*LSIZE0, src_offset_x, src_offset_x + src_cols, (uchar4)0, temp[i]);
-        temp[i]= ELEM(start_y,          src_offset_y, src_offset_y + src_rows, (uchar4)0, temp[i]);
+        temp[i] = ELEM(mad24(i, LSIZE0, start_x), src_offset_x, src_offset_x + src_cols, (srcT)(0), temp[i]);
+        temp[i] = ELEM(start_y,                   src_offset_y, src_offset_y + src_rows, (srcT)(0), temp[i]);
     }
 #else
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
-        temp[i]= ELEM(start_x+i*LSIZE0, 0, src_whole_cols, (uchar4)0, temp[i]);
-        temp[i]= ELEM(start_y,          0, src_whole_rows, (uchar4)0, temp[i]);
+        temp[i] = ELEM(mad24(i, LSIZE0, start_x), 0, src_whole_cols, (srcT)(0), temp[i]);
+        temp[i] = ELEM(start_y,                   0, src_whole_rows, (srcT)(0), temp[i]);
     }
 #endif
 #else
-    int index[READ_TIMES_ROW];
-    int s_x,s_y;
+    int index[READ_TIMES_ROW], s_x, s_y;
 
     // judge if read out of boundary
-    for (i = 0; i<READ_TIMES_ROW; i++)
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
     {
-        s_x = start_x+i*LSIZE0;
+        s_x = mad24(i, LSIZE0, start_x);
         s_y = start_y;
+
 #ifdef BORDER_ISOLATED
         EXTRAPOLATE(s_x, src_offset_x, src_offset_x + src_cols);
         EXTRAPOLATE(s_y, src_offset_y, src_offset_y + src_rows);
@@ -354,216 +336,32 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
         EXTRAPOLATE(s_x, 0, src_whole_cols);
         EXTRAPOLATE(s_y, 0, src_whole_rows);
 #endif
-        index[i]=mad24(s_y, src_step_in_pixel, s_x);
+        index[i] = mad24(s_y, src_step, s_x * SRCSIZE);
     }
 
-    //read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        temp[i] = src[index[i]];
-#endif //BORDER_CONSTANT
-
-    //save pixels to lds
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        LDS_DAT[l_y][l_x+i*LSIZE0]=temp[i];
-    barrier(CLK_LOCAL_MEM_FENCE);
-
-    //read pixels from lds and calculate the result
-    sum =convert_float4(LDS_DAT[l_y][l_x+RADIUSX])*mat_kernel[RADIUSX];
-    for (i=1; i<=RADIUSX; i++)
-    {
-        temp[0]=LDS_DAT[l_y][l_x+RADIUSX-i];
-        temp[1]=LDS_DAT[l_y][l_x+RADIUSX+i];
-        sum += convert_float4(temp[0])*mat_kernel[RADIUSX-i]+convert_float4(temp[1])*mat_kernel[RADIUSX+i];
-    }
-    //write the result to dst
-    if (x<dst_cols && y<dst_rows)
-    {
-        start_addr = mad24(y,dst_step_in_pixel,x);
-        dst[start_addr] = sum;
-    }
-}
-
-__kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_C1_D5
-    (__global float * restrict src,
-     int src_step_in_pixel,
-     int src_offset_x, int src_offset_y,
-     int src_cols, int src_rows,
-     int src_whole_cols, int src_whole_rows,
-     __global float * dst,
-     int dst_step_in_pixel,
-     int dst_cols, int dst_rows,
-     int radiusy)
-{
-    int x = get_global_id(0);
-    int y = get_global_id(1);
-    int l_x = get_local_id(0);
-    int l_y = get_local_id(1);
-    int start_x = x+src_offset_x-RADIUSX;
-    int start_y = y+src_offset_y-radiusy;
-    int start_addr = mad24(start_y,src_step_in_pixel,start_x);
-    int i;
-    float sum;
-    float temp[READ_TIMES_ROW];
-
-    __local float LDS_DAT[LSIZE1][READ_TIMES_ROW*LSIZE0+1];
-#ifdef BORDER_CONSTANT
-    int end_addr = mad24(src_whole_rows - 1,src_step_in_pixel,src_whole_cols);
-
     // read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        int current_addr = start_addr+i*LSIZE0;
-        current_addr = ((current_addr < end_addr) && (current_addr > 0)) ? current_addr : 0;
-        temp[i] = src[current_addr];
-    }
-
-    // judge if read out of boundary
-#ifdef BORDER_ISOLATED
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        temp[i]= ELEM(start_x+i*LSIZE0, src_offset_x, src_offset_x + src_cols, (float)0,temp[i]);
-        temp[i]= ELEM(start_y,          src_offset_y, src_offset_y + src_rows, (float)0,temp[i]);
-    }
-#else
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        temp[i]= ELEM(start_x+i*LSIZE0, 0, src_whole_cols, (float)0,temp[i]);
-        temp[i]= ELEM(start_y,          0, src_whole_rows, (float)0,temp[i]);
-    }
-#endif
-#else // BORDER_CONSTANT
-    int index[READ_TIMES_ROW];
-    int s_x,s_y;
-    // judge if read out of boundary
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        s_x = start_x + i*LSIZE0, s_y = start_y;
-#ifdef BORDER_ISOLATED
-        EXTRAPOLATE(s_x, src_offset_x, src_offset_x + src_cols);
-        EXTRAPOLATE(s_y, src_offset_y, src_offset_y + src_rows);
-#else
-        EXTRAPOLATE(s_x, 0, src_whole_cols);
-        EXTRAPOLATE(s_y, 0, src_whole_rows);
-#endif
-
-        index[i]=mad24(s_y, src_step_in_pixel, s_x);
-    }
-    // read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        temp[i] = src[index[i]];
-#endif// BORDER_CONSTANT
-
-    //save pixels to lds
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        LDS_DAT[l_y][l_x+i*LSIZE0]=temp[i];
-    barrier(CLK_LOCAL_MEM_FENCE);
-
-    // read pixels from lds and calculate the result
-    sum =LDS_DAT[l_y][l_x+RADIUSX]*mat_kernel[RADIUSX];
-    for (i=1; i<=RADIUSX; i++)
-    {
-        temp[0]=LDS_DAT[l_y][l_x+RADIUSX-i];
-        temp[1]=LDS_DAT[l_y][l_x+RADIUSX+i];
-        sum += temp[0]*mat_kernel[RADIUSX-i]+temp[1]*mat_kernel[RADIUSX+i];
-    }
-
-    // write the result to dst
-    if (x<dst_cols && y<dst_rows)
-    {
-        start_addr = mad24(y,dst_step_in_pixel,x);
-        dst[start_addr] = sum;
-    }
-}
-
-__kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_C4_D5
-    (__global float4 * restrict src,
-     int src_step_in_pixel,
-     int src_offset_x, int src_offset_y,
-     int src_cols, int src_rows,
-     int src_whole_cols, int src_whole_rows,
-     __global float4 * dst,
-     int dst_step_in_pixel,
-     int dst_cols, int dst_rows,
-     int radiusy)
-{
-    int x = get_global_id(0);
-    int y = get_global_id(1);
-    int l_x = get_local_id(0);
-    int l_y = get_local_id(1);
-    int start_x = x+src_offset_x-RADIUSX;
-    int start_y = y+src_offset_y-radiusy;
-    int start_addr = mad24(start_y,src_step_in_pixel,start_x);
-    int i;
-    float4 sum;
-    float4 temp[READ_TIMES_ROW];
-
-    __local float4 LDS_DAT[LSIZE1][READ_TIMES_ROW*LSIZE0+1];
-#ifdef BORDER_CONSTANT
-    int end_addr = mad24(src_whole_rows - 1,src_step_in_pixel,src_whole_cols);
-
-    // read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        int current_addr = start_addr+i*LSIZE0;
-        current_addr = ((current_addr < end_addr) && (current_addr > 0)) ? current_addr : 0;
-        temp[i] = src[current_addr];
-    }
-
-    // judge if read out of boundary
-#ifdef BORDER_ISOLATED
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        temp[i]= ELEM(start_x+i*LSIZE0, src_offset_x, src_offset_x + src_cols, (float4)0,temp[i]);
-        temp[i]= ELEM(start_y,          src_offset_y, src_offset_y + src_rows, (float4)0,temp[i]);
-    }
-#else
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        temp[i]= ELEM(start_x+i*LSIZE0, 0, src_whole_cols, (float4)0,temp[i]);
-        temp[i]= ELEM(start_y,          0, src_whole_rows, (float4)0,temp[i]);
-    }
-#endif
-#else
-    int index[READ_TIMES_ROW];
-    int s_x,s_y;
-
-    // judge if read out of boundary
-    for (i = 0; i<READ_TIMES_ROW; i++)
-    {
-        s_x = start_x + i*LSIZE0, s_y = start_y;
-#ifdef BORDER_ISOLATED
-        EXTRAPOLATE(s_x, src_offset_x, src_offset_x + src_cols);
-        EXTRAPOLATE(s_y, src_offset_y, src_offset_y + src_rows);
-#else
-        EXTRAPOLATE(s_x, 0, src_whole_cols);
-        EXTRAPOLATE(s_y, 0, src_whole_rows);
-#endif
-
-        index[i]=mad24(s_y,src_step_in_pixel,s_x);
-    }
-    // read pixels from src
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        temp[i] = src[index[i]];
-#endif
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
+        temp[i] = loadpix(src + index[i]);
+#endif // BORDER_CONSTANT
 
     // save pixels to lds
-    for (i = 0; i<READ_TIMES_ROW; i++)
-        LDS_DAT[l_y][l_x+i*LSIZE0]=temp[i];
+    for (int i = 0; i < READ_TIMES_ROW; ++i)
+        LDS_DAT[l_y][mad24(i, LSIZE0, l_x)] = temp[i];
     barrier(CLK_LOCAL_MEM_FENCE);
 
     // read pixels from lds and calculate the result
-    sum =LDS_DAT[l_y][l_x+RADIUSX]*mat_kernel[RADIUSX];
-    for (i=1; i<=RADIUSX; i++)
+    sum = convertToDstT(LDS_DAT[l_y][l_x + RADIUSX]) * mat_kernel[RADIUSX];
+    for (int i = 1; i <= RADIUSX; ++i)
     {
-        temp[0]=LDS_DAT[l_y][l_x+RADIUSX-i];
-        temp[1]=LDS_DAT[l_y][l_x+RADIUSX+i];
-        sum += temp[0]*mat_kernel[RADIUSX-i]+temp[1]*mat_kernel[RADIUSX+i];
+        temp[0] = LDS_DAT[l_y][l_x + RADIUSX - i];
+        temp[1] = LDS_DAT[l_y][l_x + RADIUSX + i];
+        sum += mad(convertToDstT(temp[0]), mat_kernel[RADIUSX - i], convertToDstT(temp[1]) * mat_kernel[RADIUSX + i]);
     }
 
     // write the result to dst
-    if (x<dst_cols && y<dst_rows)
+    if (x < dst_cols && y < dst_rows)
     {
-        start_addr = mad24(y,dst_step_in_pixel,x);
-        dst[start_addr] = sum;
+        start_addr = mad24(y, dst_step, x * DSTSIZE);
+        storepix(sum, dst + start_addr);
     }
 }
diff --git a/modules/imgproc/src/opencl/filterSep_singlePass.cl b/modules/imgproc/src/opencl/filterSep_singlePass.cl
new file mode 100644
index 0000000000..82ccd24192
--- /dev/null
+++ b/modules/imgproc/src/opencl/filterSep_singlePass.cl
@@ -0,0 +1,187 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2014, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////Macro for border type////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef BORDER_CONSTANT
+// CCCCCC|abcdefgh|CCCCCCC
+#define EXTRAPOLATE(x, maxV)
+#elif defined BORDER_REPLICATE
+// aaaaaa|abcdefgh|hhhhhhh
+#define EXTRAPOLATE(x, maxV) \
+    { \
+        (x) = max(min((x), (maxV) - 1), 0); \
+    }
+#elif defined BORDER_WRAP
+// cdefgh|abcdefgh|abcdefg
+#define EXTRAPOLATE(x, maxV) \
+    { \
+        (x) = ( (x) + (maxV) ) % (maxV); \
+    }
+#elif defined BORDER_REFLECT
+// fedcba|abcdefgh|hgfedcb
+#define EXTRAPOLATE(x, maxV) \
+    { \
+        (x) = min(((maxV)-1)*2-(x)+1, max((x),-(x)-1) ); \
+    }
+#elif defined BORDER_REFLECT_101 || defined BORDER_REFLECT101
+// gfedcb|abcdefgh|gfedcba
+#define EXTRAPOLATE(x, maxV) \
+    { \
+        (x) = min(((maxV)-1)*2-(x), max((x),-(x)) ); \
+    }
+#else
+#error No extrapolation method
+#endif
+
+#if CN != 3
+#define loadpix(addr) *(__global const srcT *)(addr)
+#define storepix(val, addr)  *(__global dstT *)(addr) = val
+#define SRCSIZE (int)sizeof(srcT)
+#define DSTSIZE (int)sizeof(dstT)
+#else
+#define loadpix(addr)  vload3(0, (__global const srcT1 *)(addr))
+#define storepix(val, addr) vstore3(val, 0, (__global dstT1 *)(addr))
+#define SRCSIZE (int)sizeof(srcT1)*3
+#define DSTSIZE (int)sizeof(dstT1)*3
+#endif
+
+#define SRC(_x,_y) convertToWT(loadpix(Src + mad24(_y, src_step, SRCSIZE * _x)))
+
+#ifdef BORDER_CONSTANT
+// CCCCCC|abcdefgh|CCCCCCC
+#define ELEM(_x,_y,r_edge,t_edge,const_v) (_x)<0 | (_x) >= (r_edge) | (_y)<0 | (_y) >= (t_edge) ? (const_v) : SRC((_x),(_y))
+#else
+#define ELEM(_x,_y,r_edge,t_edge,const_v) SRC((_x),(_y))
+#endif
+
+#define noconvert
+
+// horizontal and vertical filter kernels
+// should be defined on host during compile time to avoid overhead
+#define DIG(a) a,
+__constant float mat_kernelX[] = { KERNEL_MATRIX_X };
+__constant float mat_kernelY[] = { KERNEL_MATRIX_Y };
+
+__kernel void sep_filter(__global uchar* Src, int src_step, int srcOffsetX, int srcOffsetY, int height, int width,
+                         __global uchar* Dst, int dst_step, int dst_offset, int dst_rows, int dst_cols)
+{
+    // RADIUSX, RADIUSY are filter dimensions
+    // BLK_X, BLK_Y are local wrogroup sizes
+    // all these should be defined on host during compile time
+    // first lsmem array for source pixels used in first pass,
+    // second lsmemDy for storing first pass results
+    __local WT lsmem[BLK_Y + 2 * RADIUSY][BLK_X + 2 * RADIUSX];
+    __local WT lsmemDy[BLK_Y][BLK_X + 2 * RADIUSX];
+
+    // get local and global ids - used as image and local memory array indexes
+    int lix = get_local_id(0);
+    int liy = get_local_id(1);
+
+    int x = get_global_id(0);
+    int y = get_global_id(1);
+
+    // calculate pixel position in source image taking image offset into account
+    int srcX = x + srcOffsetX - RADIUSX;
+    int srcY = y + srcOffsetY - RADIUSY;
+    int xb = srcX;
+    int yb = srcY;
+
+    // extrapolate coordinates, if needed
+    // and read my own source pixel into local memory
+    // with account for extra border pixels, which will be read by starting workitems
+    int clocY = liy;
+    int cSrcY = srcY;
+    do
+    {
+        int yb = cSrcY;
+        EXTRAPOLATE(yb, (height));
+
+        int clocX = lix;
+        int cSrcX = srcX;
+        do
+        {
+            int xb = cSrcX;
+            EXTRAPOLATE(xb,(width));
+            lsmem[clocY][clocX] = ELEM(xb, yb, (width), (height), 0 );
+
+            clocX += BLK_X;
+            cSrcX += BLK_X;
+        }
+        while(clocX < BLK_X+(RADIUSX*2));
+
+        clocY += BLK_Y;
+        cSrcY += BLK_Y;
+    }
+    while (clocY < BLK_Y+(RADIUSY*2));
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    // do vertical filter pass
+    // and store intermediate results to second local memory array
+    int i, clocX = lix;
+    WT sum = 0.0f;
+    do
+    {
+        sum = 0.0f;
+        for (i=0; i<=2*RADIUSY; i++)
+            sum = mad(lsmem[liy+i][clocX], mat_kernelY[i], sum);
+        lsmemDy[liy][clocX] = sum;
+        clocX += BLK_X;
+    }
+    while(clocX < BLK_X+(RADIUSX*2));
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    // if this pixel happened to be out of image borders because of global size rounding,
+    // then just return
+    if( x >= dst_cols || y >=dst_rows )
+        return;
+
+    // do second horizontal filter pass
+    // and calculate final result
+    sum = 0.0f;
+    for (i=0; i<=2*RADIUSX; i++)
+        sum = mad(lsmemDy[liy][lix+i], mat_kernelX[i], sum);
+
+    //store result into destination image
+    storepix(convertToDstT(sum), Dst + mad24(y, dst_step, mad24(x, DSTSIZE, dst_offset)));
+}
diff --git a/modules/imgproc/test/ocl/test_filters.cpp b/modules/imgproc/test/ocl/test_filters.cpp
index a72258c568..55d7bc6d1b 100644
--- a/modules/imgproc/test/ocl/test_filters.cpp
+++ b/modules/imgproc/test/ocl/test_filters.cpp
@@ -306,7 +306,7 @@ OCL_TEST_P(MorphologyEx, Mat)
             (int)BORDER_REFLECT|BORDER_ISOLATED, (int)BORDER_WRAP|BORDER_ISOLATED, \
             (int)BORDER_REFLECT_101|BORDER_ISOLATED*/) // WRAP and ISOLATED are not supported by cv:: version
 
-#define FILTER_TYPES Values(CV_8UC1, CV_8UC2, CV_8UC4, CV_32FC1, CV_32FC4, CV_64FC1, CV_64FC4)
+#define FILTER_TYPES Values(CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1, CV_32FC3, CV_32FC4)
 
 OCL_INSTANTIATE_TEST_CASE_P(Filter, Bilateral, Combine(
                             Values((MatType)CV_8UC1),
diff --git a/modules/imgproc/test/ocl/test_sepfilter2D.cpp b/modules/imgproc/test/ocl/test_sepfilter2D.cpp
index d242a734f6..34af4a6173 100644
--- a/modules/imgproc/test/ocl/test_sepfilter2D.cpp
+++ b/modules/imgproc/test/ocl/test_sepfilter2D.cpp
@@ -75,33 +75,24 @@ PARAM_TEST_CASE(SepFilter2D, MatDepth, Channels, BorderType, bool, bool)
     void random_roi()
     {
         Size ksize = randomSize(kernelMinSize, kernelMaxSize);
-        if (1 != (ksize.width % 2))
+        if (1 != ksize.width % 2)
             ksize.width++;
-        if (1 != (ksize.height % 2))
+        if (1 != ksize.height % 2)
             ksize.height++;
+
         Mat temp = randomMat(Size(ksize.width, 1), CV_MAKE_TYPE(CV_32F, 1), -MAX_VALUE, MAX_VALUE);
         cv::normalize(temp, kernelX, 1.0, 0.0, NORM_L1);
         temp = randomMat(Size(1, ksize.height),  CV_MAKE_TYPE(CV_32F, 1), -MAX_VALUE, MAX_VALUE);
         cv::normalize(temp, kernelY, 1.0, 0.0, NORM_L1);
 
         Size roiSize = randomSize(ksize.width, MAX_VALUE, ksize.height, MAX_VALUE);
-        int rest = roiSize.width % 4;
-        if (0 != rest)
-            roiSize.width += (4 - rest);
         Border srcBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
-        rest = srcBorder.lef % 4;
-        if (0 != rest)
-            srcBorder.lef += (4 - rest);
-        rest = srcBorder.rig % 4;
-        if (0 != rest)
-            srcBorder.rig += (4 - rest);
         randomSubMat(src, src_roi, roiSize, srcBorder, type, -MAX_VALUE, MAX_VALUE);
 
         Border dstBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
         randomSubMat(dst, dst_roi, roiSize, dstBorder, type, -MAX_VALUE, MAX_VALUE);
 
-        anchor.x = -1;
-        anchor.y = -1;
+        anchor.x = anchor.y = -1;
 
         UMAT_UPLOAD_INPUT_PARAMETER(src);
         UMAT_UPLOAD_OUTPUT_PARAMETER(dst);
@@ -115,7 +106,7 @@ PARAM_TEST_CASE(SepFilter2D, MatDepth, Channels, BorderType, bool, bool)
 
 OCL_TEST_P(SepFilter2D, Mat)
 {
-    for (int j = 0; j < test_loop_times; j++)
+    for (int j = 0; j < test_loop_times + 3; j++)
     {
         random_roi();
 
@@ -126,11 +117,10 @@ OCL_TEST_P(SepFilter2D, Mat)
     }
 }
 
-
 OCL_INSTANTIATE_TEST_CASE_P(ImageProc, SepFilter2D,
                             Combine(
                                 Values(CV_8U, CV_32F),
-                                Values(1, 4),
+                                OCL_ALL_CHANNELS,
                                 Values(
                                         (BorderType)BORDER_CONSTANT,
                                         (BorderType)BORDER_REPLICATE,
diff --git a/modules/superres/src/btv_l1.cpp b/modules/superres/src/btv_l1.cpp
index 1e4aa48a7d..d54b4b398a 100644
--- a/modules/superres/src/btv_l1.cpp
+++ b/modules/superres/src/btv_l1.cpp
@@ -1014,10 +1014,8 @@ namespace
             return;
 
 #ifdef HAVE_OPENCL
-        if (isUmat_ && curFrame_.channels() == 1)
+        if (isUmat_)
             curFrame_.copyTo(ucurFrame_);
-        else
-            isUmat_ = false;
 #endif
         ++storePos_;