QImage与OpenCV中的MAT图像格式转换

1、Mat转换为QImage

QImage Mat2QImage(const Mat& mat)
{
Mat rgb;
cvtColor(mat, rgb, CV_BGR2RGB);
    return QImage((const unsigned char*)(rgb.data), rgb.cols, rgb.rows, QImage::Format_RGB888); 
}


2、QImage转换为 Mat

Mat QImage2Mat(const QImage& qimage)

{
Mat mat = Mat(qimage.height(), qimage.width(), CV_8UC4, (uchar*)qimage.bits(), qimage.bytesPerLine()); 
Mat mat2 = Mat(mat.rows, mat.cols, CV_8UC3 ); 
int from_to[] = { 0,0, 1,1, 2,2 }; 
mixChannels( &mat, 1, &mat2, 1, from_to, 3 ); 
return mat2; 

}

转自：http://blog.sina.com.cn/s/blog_7559ce850100ydvy.html