Merge commit '05b9c991dd' into merge-2.4

Conflicts:
	modules/cuda/test/test_objdetect.cpp
	modules/gpu/perf/perf_core.cpp
	modules/gpu/perf/perf_video.cpp
	modules/gpu/test/test_core.cpp

modules/cuda/test/test_gpumat.cpp

@@ -281,7 +281,7 @@ CUDA_TEST_P(ConvertTo, WithOutScaling)
         cv::Mat dst_gold;
         src.convertTo(dst_gold, depth2);
 
-        EXPECT_MAT_NEAR(dst_gold, dst, 0.0);
+        EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
     }
 }