Set sanity thresholds for several performance tests

modules/imgproc/perf/perf_blur.cpp

@@ -89,7 +89,7 @@ PERF_TEST_P(Size_MatType_BorderType3x3, blur3x3,
 
     TEST_CYCLE() blur(src, dst, Size(3,3), Point(-1,-1), btype);
 
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 1e-3);
 }
 
 PERF_TEST_P(Size_MatType_BorderType, gaussianBlur5x5,
@@ -133,5 +133,5 @@ PERF_TEST_P(Size_MatType_BorderType, blur5x5,
 
     TEST_CYCLE() blur(src, dst, Size(5,5), Point(-1,-1), btype);
 
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 1e-3);
 }

modules/imgproc/perf/perf_cornerEigenValsAndVecs.cpp

@@ -33,5 +33,5 @@ PERF_TEST_P(Img_BlockSize_ApertureSize_BorderType, cornerEigenValsAndVecs,
 
     TEST_CYCLE() cornerEigenValsAndVecs(src, dst, blockSize, apertureSize, borderType);
 
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 2e-5);
 }
\ No newline at end of file

modules/imgproc/perf/perf_integral.cpp

@@ -78,5 +78,5 @@ PERF_TEST_P( Size_MatType_OutMatDepth, integral_sqsum_tilted,
     
     SANITY_CHECK(sum, 1e-6);
     SANITY_CHECK(sqsum, 1e-6);
-    SANITY_CHECK(tilted, 1e-6);
+    SANITY_CHECK(tilted, 1e-6, tilted.depth() > CV_32S ? ERROR_RELATIVE : ERROR_ABSOLUTE);
 }