increase epsilons for some tests, which functions use floating point arithm

modules/gpu/perf/perf_imgproc.cpp

@@ -1413,7 +1413,7 @@ PERF_TEST_P(Sz_Depth_Code, ImgProc_CvtColor,
 
         TEST_CYCLE() cv::gpu::cvtColor(d_src, dst, info.code, info.dcn);
 
-        GPU_SANITY_CHECK(dst, 1e-4);
+        GPU_SANITY_CHECK(dst, 1e-2);
     }
     else
     {
@@ -1609,7 +1609,7 @@ PERF_TEST_P(Sz_Depth_Cn, ImgProc_ImagePyramidBuild,
         cv::gpu::GpuMat dst;
         d_pyr.getLayer(dst, dstSize);
 
-        GPU_SANITY_CHECK(dst);
+        GPU_SANITY_CHECK(dst, 1e-3);
     }
     else
     {
@@ -1646,7 +1646,7 @@ PERF_TEST_P(Sz_Depth_Cn, ImgProc_ImagePyramidGetLayer,
 
         TEST_CYCLE() d_pyr.getLayer(dst, dstSize);
 
-        GPU_SANITY_CHECK(dst);
+        GPU_SANITY_CHECK(dst, 1e-3);
     }
     else
     {

modules/gpu/perf/perf_video.cpp

@@ -143,7 +143,7 @@ PERF_TEST_P(ImagePair, Video_CreateOpticalFlowNeedleMap,
 
         TEST_CYCLE() cv::gpu::createOpticalFlowNeedleMap(u, v, vertex, colors);
 
-        GPU_SANITY_CHECK(vertex, 1e-6);
+        GPU_SANITY_CHECK(vertex, 1e-5);
         GPU_SANITY_CHECK(colors);
     }
     else

modules/gpu/test/test_denoising.cpp

@@ -134,8 +134,8 @@ GPU_TEST_P(BruteForceNonLocalMeans, Regression)
     cv::resize(bgr_gold, bgr_gold, cv::Size(256, 256));
     cv::resize(gray_gold, gray_gold, cv::Size(256, 256));
 
-    EXPECT_MAT_NEAR(bgr_gold, dbgr, 1e-4);
-    EXPECT_MAT_NEAR(gray_gold, dgray, 1e-4);
+    EXPECT_MAT_NEAR(bgr_gold, dbgr, 1);
+    EXPECT_MAT_NEAR(gray_gold, dgray, 1);
 }
 
 INSTANTIATE_TEST_CASE_P(GPU_Denoising, BruteForceNonLocalMeans, ALL_DEVICES);