Merge pull request #10348 from ElenaGvozdeva:Canny_HAL

modules/imgproc/src/canny.cpp

@@ -956,7 +956,11 @@ void Canny( InputArray _src, OutputArray _dst,
     CV_OCL_RUN(_dst.isUMat() && (_src.channels() == 1 || _src.channels() == 3),
                ocl_Canny<false>(_src, UMat(), UMat(), _dst, (float)low_thresh, (float)high_thresh, aperture_size, L2gradient, _src.channels(), size))
 
-    Mat src = _src.getMat(), dst = _dst.getMat();
+    Mat src0 = _src.getMat(), dst = _dst.getMat();
+    Mat src(src0.size(), src0.type(), src0.data, src0.step);
+
+    CALL_HAL(canny, cv_hal_canny, src.data, src.step, dst.data, dst.step, src.cols, src.rows, src.channels(),
+             low_thresh, high_thresh, aperture_size, L2gradient);
 
     CV_OVX_RUN(
         false && /* disabling due to accuracy issues */

modules/imgproc/src/hal_replacement.hpp

@@ -756,6 +756,22 @@ inline int hal_ni_pyrdown(const uchar* src_data, size_t src_step, int src_width,
 #define cv_hal_pyrdown hal_ni_pyrdown
 //! @endcond
 
+/**
+   @brief Canny edge detector
+   @param src_data,src_step Source image
+   @param dst_data,dst_step Destination image
+   @param width,height Source image dimensions
+   @param cn Number of channels
+   @param lowThreshold, highThreshold Thresholds value
+   @param ksize Kernel size for Sobel operator.
+   @param L2gradient Flag, indicating use L2 or L1 norma.
+*/
+inline int hal_ni_canny(const uchar* src_data, size_t src_step, uchar* dst_data, size_t dst_step, int width, int height, int cn, double lowThreshold, double highThreshold, int ksize, bool L2gradient) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+
+//! @cond IGNORED
+#define cv_hal_canny hal_ni_canny
+//! @endcond
+
 //! @}
 
 #if defined __GNUC__