Qimage与IplImage的转换

QImage test2012::ImageCV2Qimg(IplImage* img)
{
 assert(img!=NULL);
 int h = img->height;
 int w = img->width;
 int channel = img->nChannels;
 QImage qimg = QImage(w, h, QImage::Format_RGB32);

for(int i=0;i<h;i++)  
    {  
        for(int j=0;j<w;j++)  
        {  
            int r,g,b;  
            if(channel == 3)  
            {  
                b=(int)CV_IMAGE_ELEM(img,uchar,i,j*3+0);  
                g=(int)CV_IMAGE_ELEM(img,uchar,i,j*3+1);  
                r=(int)CV_IMAGE_ELEM(img,uchar,i,j*3+2);  
            }  
            else if(channel == 1)  
            {  
                b=(int)CV_IMAGE_ELEM(img,uchar,i,j);  
                g=b;  
                r=b;  
            }  
            qimg.setPixel(j,i,qRgb(r,g,b));  
        }  
    }  
 return qimg;
}

Qimage的存储顺序是RGB，而IplImage的存储顺序是BGR，所以我们要按顺序恢复。