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Fix signed integer overflow in connected components

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This commit is contained in:
Gil Shotan
2020-09-11 02:47:53 +03:00
parent 03bee14372
commit 1612db5f91
2 changed files with 28 additions and 7 deletions
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modules/imgproc/test/test_connectedcomponents.cpp
+14
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@@ -225,5 +225,19 @@ TEST(Imgproc_ConnectedComponents, parallel_wu_labels)
EXPECT_EQ(nbPixels, area);
}
TEST(Imgproc_ConnectedComponents, missing_background_pixels)
{
cv::Mat m = Mat::ones(10, 10, CV_8U);
cv::Mat labels;
cv::Mat stats;
cv::Mat centroids;
EXPECT_NO_THROW(cv::connectedComponentsWithStats(m, labels, stats, centroids, 8, CV_32S, cv::CCL_WU) );
EXPECT_EQ(stats.at<int32_t>(0, cv::CC_STAT_WIDTH), 0);
EXPECT_EQ(stats.at<int32_t>(0, cv::CC_STAT_HEIGHT), 0);
EXPECT_EQ(stats.at<int32_t>(0, cv::CC_STAT_LEFT), -1);
EXPECT_TRUE(std::isnan(centroids.at<double>(0, 0)));
EXPECT_TRUE(std::isnan(centroids.at<double>(0, 1)));
}
}} // namespace