System Information

Any with OpenCV 5 at HEAD

Detailed description

Since https://github.com/opencv/opencv/pull/23473/changes#diff-3be366740aac9a82703bf5930bf69f2f9aff56b7c5b5de67eb84799553b0c571, OpenCV 5 does not support in-place with extractChannel.

Steps to reproduce

TEST(Core_Mat, extractChannel)
{
    cv::Mat mat(3, 3, CV_8UC3, Scalar(1,2,3));
    cv::extractChannel(mat, mat, 1);
    EXPECT_EQ(mat.channels(), 1);
}

extractChannel throws. Reverting the _dst.createSameSize to _dst.create works. Should we revert ? Is there a bug in createSameSize ? Should we not allow in place ? Thx

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)