OpenCV读入的图像如何显示在窗体上

作者：hardVB

转自：http://blog.youkuaiyun.com/hardvb/article/details/1575349

IplImage* pImg; 

   CString strPathName; 
   CFileDialog dlg(TRUE); 
   CDC *  pDC  =   this -> GetDC(); 
   CRect rect; 
    this -> GetClientRect( & rect); 
    if (dlg.DoModal() == IDOK) 
    { 
      strPathName = dlg.GetPathName(); 

      pImg = cvLoadImage(strPathName); 
      BITMAPINFO bmi; 
      FillBitmapInfo(&bmi,pImg->width,pImg->height,(pImg->depth)*(pImg->nChannels));    
       
      ::StretchDIBits(pDC->GetSafeHdc(),rect.left,rect.top,pImg->width,pImg->height,0,0,pImg->width,pImg->height,pImg->imageData,&bmi,DIB_RGB_COLORS,SRCCOPY); 
   }

void   COpenCVDrawView::FillBitmapInfo( BITMAPINFO *  bmi,  int  width,  int  height,  int  bpp ) 
{ 
    ASSERT( bmi && width > 0 && height > 0 && 
      (bpp == 8 || bpp == 24 || bpp == 32) ); 
    
    BITMAPINFOHEADER* bmih = &(bmi->bmiHeader); 
    
    memset( bmih, 0, sizeof(*bmih)); 
    bmih->biSize   = sizeof(BITMAPINFOHEADER); 
    bmih->biWidth  = width; 
    bmih->biHeight = -abs(height); 
    bmih->biPlanes = 1; 
    bmih->biBitCount = bpp; 
    bmih->biCompression = BI_RGB; 
    
    if( bpp == 8 ) 
    { 
        RGBQUAD* palette = bmi->bmiColors; 
        int i; 
        for( i = 0; i < 256; i++ ) 
        { 
            palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i; 
            palette[i].rgbReserved = 0; 
        } 
    } 
}