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fix meanStdDev overflow for large images

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This commit is contained in:
shyama7004
2025-02-06 00:30:48 +05:30
committed by Alexander Smorkalov
parent 43cebe52eb
commit 987ba6504b
2 changed files with 15 additions and 1 deletions
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modules/core/test/test_arithm.cpp
+13
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@@ -2814,6 +2814,19 @@ TEST(Core_MeanStdDev, regression_multichannel)
}
}
// Related issue : https://github.com/opencv/opencv/issues/26861
TEST(Core_MeanStdDevTest, LargeImage)
{
applyTestTag(CV_TEST_TAG_VERYLONG);
applyTestTag(CV_TEST_TAG_MEMORY_14GB);
// (1<<16) * ((1<<15)+10) = ~2.147 billion
cv::Mat largeImage = cv::Mat::ones((1 << 16), ((1 << 15) + 10), CV_8U);
cv::Scalar mean, stddev;
cv::meanStdDev(largeImage, mean, stddev);
EXPECT_NEAR(mean[0], 1.0, 1e-5);
EXPECT_NEAR(stddev[0], 0.0, 1e-5);
}
template <typename T> static inline
void testDivideInitData(Mat& src1, Mat& src2)
{