Add test for issue #2646
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@ -145,3 +145,14 @@ TEST(Photo_DenoisingColoredMulti, regression)
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ASSERT_EQ(0, norm(result != expected));
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}
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TEST(Photo_White, issue_2646)
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{
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cv::Mat img(50, 50, CV_8UC1, cv::Scalar::all(255));
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cv::Mat filtered;
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cv::fastNlMeansDenoising(img, filtered);
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int nonWhitePixelsCount = (int)img.total() - cv::countNonZero(filtered == img);
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ASSERT_EQ(0, nonWhitePixelsCount);
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}
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