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How to Convert a cv::Mat to a QImage in C ?

Susan Sarandon

Nov 28, 2024 pm 08:32 PM

How to Convert a cv::Mat to a QImage in C ?

How to Convert OpenCV cv::Mat to QImage

Problem:

How can I convert an OpenCV cv::Mat type to QImage in C ? Converting IPlimage to QImage using existing code is not sufficient.

Solution:

Michal Kottman's response is generally accurate, but it may fail for certain images. To address this issue, you can use the following solution:

QImage imgIn = QImage((uchar*) img.data, img.cols, img.rows, img.step, QImage::Format_RGB888);

Explanation:

The key difference in this approach is the addition of img.step, which specifies the byte width of each row in the cv::Mat. Without this parameter, Qt may not always render images correctly.

By including img.step, you can ensure compatibility with a broader range of images and prevent rendering issues.

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