QT -- QImage 转 OpenCV Mat

Qt5 中 QImage 转 OpenCV Mat 格式函数。

 

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cv::Mat ImageMark::QImage2Mat(const QImage& image) {     switch(image.format())     {         // 8-bit, 4 channel         case QImage::Format_ARGB32:             break;         case QImage::Format_ARGB32_Premultiplied:             {                 cv::Mat mat(image.height(), image.width(),                             CV_8UC4,                             (void*)image.constBits(),                             image.bytesPerLine());                 return mat.clone();             }                       // 8-bit, 3 channel         case QImage::Format_RGB32:             {                 cv::Mat mat(image.height(),image.width(),                             CV_8UC4,                             (void*)image.constBits(),                             image.bytesPerLine());                                    // drop the all-white alpha channel                 cv::cvtColor(mat, mat, cv::COLOR_BGRA2BGR);                  return mat.clone();             }         case QImage::Format_RGB888:             {                 QImage swapped = inImage.rgbSwapped();                 cv::Mat mat(swapped.height(), swapped.width(),                             CV_8UC3,                             (void*)image.constBits(),                             image.bytesPerLine());                 return mat.clone();             }                       // 8-bit, 1 channel           case QImage::Format_Indexed8:             {                 cv::Mat mat(image.height(),image.width(),                             CV_8UC1,                             (void*)image.constBits(),                             image.bytesPerLine());                 return mat.clone();             }                       // wrong         default:             qDebug() << "ERROR: QImage could not be converted to Mat.";                break;     }     return cv::Mat(); }

　　

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