How to Efficiently Convert OpenCV's cv::Mat to Qt's QImage?

Converting OpenCV cv::Mat to QImage

In computer vision applications, it is often necessary to convert between different image formats. One common scenario is converting OpenCV's cv::Mat to Qt's QImage. Here's how to achieve this conversion:

For some cases, Michal Kottman's solution of using QImage imgIn= QImage((uchar*) img.data, img.cols, img.rows, img.step, QImage::Format_RGB888); will suffice. However, certain images may not display correctly without the inclusion of img.step in the conversion.

To address this issue, the revised solution is:

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

This modification ensures that the image is converted correctly regardless of its specific characteristics. Keep in mind that Qt may not issue a warning if img.step is omitted, but its presence is crucial for maintaining image integrity.

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