Mat转CImage

uchar *pImg=(uchar *)CI.GetBits();//得到CImage数据区地址

ps=img.ptr<uchar>(i);

void MatToCImage( Mat &mat, CImage &cImage)
{
    //create new CImage
    int width    = mat.cols;
    int height   = mat.rows;
    int channels = mat.channels();
 
    cImage.Destroy(); //clear
    cImage.Create(width, height,8*channels ); //默认图像像素单通道占用1个字节
 
    //copy values
    uchar* ps;
    uchar* pimg = (uchar*)cImage.GetBits(); //A pointer to the bitmap buffer
    int step = cImage.GetPitch();
 
    for (int i = 0; i < height; ++i)
    {
        ps = (mat.ptr<uchar>(i));
        for ( int j = 0; j < width; ++j )
        {
            if ( channels == 1 ) //gray
            {
                *(pimg + i*step + j) = ps[j];
            }
            else if ( channels == 3 ) //color
            {
                for (int k = 0 ; k < 3; ++k )
                {
                    *(pimg + i*step + j*3 + k ) = ps[j*3 + k];
                }            
            }
        }    
    }
}

            //cImage数据存到pbImage，后再转换为源灰度图pbSrc
            iPitch=cImage.GetPitch();
            iBytePerPixel=(cImage.GetBPP()+7)/8;
            if(iBytePerPixel==3)
            {
                for(y=0;y<iHeight;y++)
                {   //load的图像数据放到pbImage
                    pbImage=(PBYTE)(PBYTE(cImage.GetBits())+iPitch*y);//得到的是图像初始像素地址
                    for(x=0;x<iWidth;x++)
                    {
                        //pbImage转换为灰度图pbSrc
                        pbSrc[y*iWidth+x]=(pbImage[3*x]*0.15+pbImage[3*x+1]*0.55+pbImage[3*x+2]*0.3);
                    }
                }
            }
            cImage.Destroy();

【转载自】

OpenCV中Mat对象转CImage - 挨踢生涯 - CSDN博客 https://blog.csdn.net/xianglifighter/article/details/38319903