Merge pull request #17092 from alalek:imgproc_ipp_parallel_gaussuanBlur

modules/core/include/opencv2/core/private.hpp

@@ -208,8 +208,6 @@ T* allocSingletonNew() { return new(allocSingletonNewBuffer(sizeof(T))) T(); }
 #define IPP_DISABLE_HOUGH               1 // improper integration/results
 #define IPP_DISABLE_FILTER2D_BIG_MASK   1 // different results on masks > 7x7
 
-#define IPP_DISABLE_GAUSSIANBLUR_PARALLEL 1 // not supported (2017u2 / 2017u3)
-
 // Temporary disabled named IPP region. Performance
 #define IPP_DISABLE_PERF_COPYMAKE       1 // performance variations
 #define IPP_DISABLE_PERF_LUT            1 // there are no performance benefits (PR #2653)

modules/imgproc/CMakeLists.txt

@@ -12,3 +12,9 @@ ocv_add_dispatched_file(smooth SSE2 SSE4_1 AVX2)
 ocv_add_dispatched_file(sumpixels SSE2 AVX2 AVX512_SKX)
 ocv_add_dispatched_file(undistort SSE2 AVX2)
 ocv_define_module(imgproc opencv_core WRAP java python js)
+
+ocv_check_environment_variables(OPENCV_IPP_GAUSSIAN_BLUR)
+option(OPENCV_IPP_GAUSSIAN_BLUR "Enable IPP optimizations for GaussianBlur (+8Mb in binary size)" OFF)
+if(OPENCV_IPP_GAUSSIAN_BLUR)
+  ocv_append_source_file_compile_definitions(${CMAKE_CURRENT_SOURCE_DIR}/src/smooth.dispatch.cpp "ENABLE_IPP_GAUSSIAN_BLUR=1")
+endif()

modules/imgproc/perf/opencl/perf_filters.cpp

@@ -238,15 +238,13 @@ OCL_PERF_TEST_P(ScharrFixture, Scharr,
 
 ///////////// GaussianBlur ////////////////////////
 
-typedef FilterFixture GaussianBlurFixture;
+typedef FilterFixture OCL_GaussianBlurFixture;
 
-OCL_PERF_TEST_P(GaussianBlurFixture, GaussianBlur,
+PERF_TEST_P_(OCL_GaussianBlurFixture, GaussianBlur)
-            ::testing::Combine(OCL_TEST_SIZES, OCL_TEST_TYPES, OCL_PERF_ENUM(3, 5, 7)))
 {
-    const FilterParams params = GetParam();
+    const FilterParams& params = GetParam();
     const Size srcSize = get<0>(params);
     const int type = get<1>(params), ksize = get<2>(params);
-    const double eps = CV_MAT_DEPTH(type) <= CV_32S ? 2 + DBL_EPSILON : 3e-4;
 
     checkDeviceMaxMemoryAllocSize(srcSize, type);
 
@@ -255,9 +253,42 @@ OCL_PERF_TEST_P(GaussianBlurFixture, GaussianBlur,
 
     OCL_TEST_CYCLE() cv::GaussianBlur(src, dst, Size(ksize, ksize), 1, 1, cv::BORDER_CONSTANT);
 
-    SANITY_CHECK(dst, eps);
+    SANITY_CHECK_NOTHING();
 }
 
+INSTANTIATE_TEST_CASE_P(/*nothing*/, OCL_GaussianBlurFixture,
+    ::testing::Combine(
+        OCL_TEST_SIZES,
+        OCL_TEST_TYPES,
+        OCL_PERF_ENUM(3, 5, 7)
+    )
+);
+
+INSTANTIATE_TEST_CASE_P(SIFT, OCL_GaussianBlurFixture,
+    ::testing::Combine(
+        ::testing::Values(sz1080p),
+        ::testing::Values(CV_32FC1),
+        OCL_PERF_ENUM(11, 13, 17, 21, 27)
+    )
+);
+
+INSTANTIATE_TEST_CASE_P(DISABLED_FULL, OCL_GaussianBlurFixture,
+    ::testing::Combine(
+        ::testing::Values(sz1080p),
+        ::testing::Values(
+            CV_8UC1, CV_8UC2, CV_8UC3, CV_8UC4,
+            CV_8SC1, CV_8SC2, CV_8SC3, CV_8SC4,
+            CV_16UC1, CV_16UC2, CV_16UC3, CV_16UC4,
+            CV_16SC1, CV_16SC2, CV_16SC3, CV_16SC4,
+            CV_32SC1, CV_32SC2, CV_32SC3, CV_32SC4,
+            CV_32FC1, CV_32FC2, CV_32FC3, CV_32FC4,
+            CV_64FC1, CV_64FC2, CV_64FC3, CV_64FC4
+        ),
+        OCL_PERF_ENUM(3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29)
+    )
+);
+
+
 ///////////// Filter2D ////////////////////////
 
 typedef FilterFixture Filter2DFixture;

modules/imgproc/src/smooth.dispatch.cpp

@@ -470,9 +470,14 @@ static bool openvx_gaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
 
 #endif
 
-#if 0 //defined HAVE_IPP
+#if defined ENABLE_IPP_GAUSSIAN_BLUR  // see CMake's OPENCV_IPP_GAUSSIAN_BLUR option
+
+#define IPP_DISABLE_GAUSSIAN_BLUR_LARGE_KERNELS_1TH 1
+#define IPP_DISABLE_GAUSSIAN_BLUR_16SC4_1TH 1
+#define IPP_DISABLE_GAUSSIAN_BLUR_32FC4_1TH 1
+
 // IW 2017u2 has bug which doesn't allow use of partial inMem with tiling
-#if IPP_DISABLE_GAUSSIANBLUR_PARALLEL
+#if IPP_VERSION_X100 < 201900
 #define IPP_GAUSSIANBLUR_PARALLEL 0
 #else
 #define IPP_GAUSSIANBLUR_PARALLEL 1
@@ -555,6 +560,14 @@ static bool ipp_GaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
             return false;
 
         const int threads = ippiSuggestThreadsNum(iwDst, 2);
+
+        if (IPP_DISABLE_GAUSSIAN_BLUR_LARGE_KERNELS_1TH && (threads == 1 && ksize.width > 25))
+            return false;
+        if (IPP_DISABLE_GAUSSIAN_BLUR_16SC4_1TH && (threads == 1 && src.type() == CV_16SC4))
+            return false;
+        if (IPP_DISABLE_GAUSSIAN_BLUR_32FC4_1TH && (threads == 1 && src.type() == CV_32FC4))
+            return false;
+
         if(IPP_GAUSSIANBLUR_PARALLEL && threads > 1) {
             bool ok;
             ipp_gaussianBlurParallel invoker(iwSrc, iwDst, ksize.width, (float) sigma1, ippBorder, &ok);
@@ -655,8 +668,6 @@ void GaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
     CV_OVX_RUN(true,
                openvx_gaussianBlur(src, dst, ksize, sigma1, sigma2, borderType))
 
-    //CV_IPP_RUN_FAST(ipp_GaussianBlur(src, dst, ksize, sigma1, sigma2, borderType));
-
     if(sdepth == CV_8U && ((borderType & BORDER_ISOLATED) || !_src.getMat().isSubmatrix()))
     {
         std::vector<ufixedpoint16> fkx, fky;
@@ -681,6 +692,11 @@ void GaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
         }
     }
 
+#if defined ENABLE_IPP_GAUSSIAN_BLUR
+    // IPP is not bit-exact to OpenCV implementation
+    CV_IPP_RUN_FAST(ipp_GaussianBlur(src, dst, ksize, sigma1, sigma2, borderType));
+#endif
+
     sepFilter2D(src, dst, sdepth, kx, ky, Point(-1, -1), 0, borderType);
 }