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Hi you can ref: http://lh2078.blog.163.com/blog/static/5681137220131311492631/

Hi you can ref: http://lh2078.blog.163.com/blog/static/5681137220131311492631/int ShowMat( cv::Mat img, HWND hWndDisplay ) { if (img.channels()<3 ) { return -1; }

RECT rect;
GetClientRect(hWndDisplay, &rect);
cv::Mat imgShow( abs(rect.top - rect.bottom), abs(rect.right - rect.left), CV_8UC3 );
resize( img, imgShow, imgShow.size() );

ATL::CImage CI;
int w=imgShow.cols;//宽
int h=imgShow.rows;//高
int channels=imgShow.channels();//通道数

CI.Create( w, h, 8*channels);
uchar *pS;
uchar *pImg=(uchar *)CI.GetBits();//得到CImage数据区地址
int step=CI.GetPitch();
for(int i=0;i<h;i++)
{
    pS=imgShow.ptr<uchar>(i);
    for(int j=0;j<w;j++)
    {
        for(int k=0;k<3;k++)
            *(pImg+i*step+j*3+k)=pS[j*3+k];
        //注意到这里的step不用乘以3
    }
}

HDC dc ;
dc = GetDC( hWndDisplay );
CI.Draw( dc, 0, 0 );
ReleaseDC( hWndDisplay, dc);
CI.Destroy();

return 0;

try list:

int ShowMat( cv::Mat img, HWND hWndDisplay )
 {
     if (img.channels()<3 )
     {
         return -1;
    }
 
    }

        RECT rect;
 GetClientRect(hWndDisplay, &rect);
 cv::Mat imgShow( abs(rect.top - rect.bottom), abs(rect.right - rect.left), CV_8UC3 );
 resize( img, imgShow, imgShow.size() );

 ATL::CImage CI;
 int w=imgShow.cols;//宽
 int h=imgShow.rows;//高
 int channels=imgShow.channels();//通道数

 CI.Create( w, h, 8*channels);
 uchar *pS;
 uchar *pImg=(uchar *)CI.GetBits();//得到CImage数据区地址
 int step=CI.GetPitch();
 for(int i=0;i<h;i++)
 {
     pS=imgShow.ptr<uchar>(i);
     for(int j=0;j<w;j++)
     {
         for(int k=0;k<3;k++)
             *(pImg+i*step+j*3+k)=pS[j*3+k];
         //注意到这里的step不用乘以3
     }
 }

 HDC dc ;
 dc = GetDC( hWndDisplay );
 CI.Draw( dc, 0, 0 );
 ReleaseDC( hWndDisplay, dc);
 CI.Destroy();

 return 0;
    }
  
}