increased epsilon in sanity test

modules/gpu/perf/perf_imgproc.cpp

@@ -1038,7 +1038,7 @@ PERF_TEST_P(Image_Type_Border_BlockSz_ApertureSz, ImgProc_CornerHarris,
 
         TEST_CYCLE() cv::gpu::cornerHarris(d_img, dst, d_Dx, d_Dy, d_buf, blockSize, apertureSize, k, borderMode);
 
-        GPU_SANITY_CHECK(dst);
+        GPU_SANITY_CHECK(dst, 1e-4);
     }
     else
     {
@@ -1081,7 +1081,7 @@ PERF_TEST_P(Image_Type_Border_BlockSz_ApertureSz, ImgProc_CornerMinEigenVal,
 
         TEST_CYCLE() cv::gpu::cornerMinEigenVal(d_img, dst, d_Dx, d_Dy, d_buf, blockSize, apertureSize, borderMode);
 
-        GPU_SANITY_CHECK(dst);
+        GPU_SANITY_CHECK(dst, 1e-4);
     }
     else
     {

modules/gpu/perf/perf_video.cpp

@@ -372,8 +372,8 @@ PERF_TEST_P(ImagePair, Video_OpticalFlowDual_TVL1,
 
         TEST_CYCLE() d_alg(d_frame0, d_frame1, u, v);
 
-        GPU_SANITY_CHECK(u, 1e-4);
-        GPU_SANITY_CHECK(v, 1e-4);
+        GPU_SANITY_CHECK(u, 1e-2);
+        GPU_SANITY_CHECK(v, 1e-2);
     }
     else
     {