System Information

OpenCV 4.10.0, vcpkg, MSVC 2022

Detailed description

Demosaicking an 8-Bit image with the VNG method produces an output image which is shifted vertically by two pixels.

The same applies to all four options: COLOR_BayerRG2RGB_VNG , COLOR_BayerRG2GRB_VNG , COLOR_BayerBG2RGB_VNG and COLOR_BayerGB2RGB_VNG .

There are also artefacts along the edges, but that's not as serious imho.

in	out

Steps to reproduce

    cv::Mat in = cv::Mat::eye(16, 16, CV_8UC1) * 255;
    cv::resize(in, in, {}, 2, 2, cv::INTER_NEAREST);

    cv::Mat out;
    cv::cvtColor(in, out, cv::COLOR_BayerRG2RGB_VNG);

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)