IplImage 与 CBitmap类的相互转换

本文主要是介绍IplImage 与 CBitmap类的相互转换，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

转自：（但是他也是转的，原创的没去找）http://blog.csdn.net/highyyy/article/details/6210408

在VC中利用OpenCV做图像处理程序时，有时需要把IpImage 类型和CBitmap类型相互转换，这样就可以利用VC中的GDI+函数对图像进行某些特殊的显示和处理，非常方便。这里是本人项目中写的两个转换小函数，仅供参考，转载注明，这样方便发现问题的朋友联系我及时修改。

1 IplImage转换为CBitmap类型

CBitmap *IplImage2CBitmap(const IplImage *pImage)
{
if( pImage && pImage->depth == IPL_DEPTH_8U )
{
   HDC hDC=GetDC(NULL);
   uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
   BITMAPINFO* bmi = (BITMAPINFO*)buffer;
   int bmp_w = pImage->width, bmp_h = pImage->height;
   FillBitmapInfo( bmi, bmp_w, bmp_h, pImage->depth*pImage->nChannels, pImage->origin );

   char *pBits=NULL;
   HBITMAP hBitmap=CreateDIBSection(hDC,bmi,DIB_RGB_COLORS,(void**)&pBits,NULL,0);
   memcpy(pBits,pImage->imageData,pImage->imageSize);
   CBitmap *pBitmap=new CBitmap;
   pBitmap->Attach(hBitmap);

return pBitmap;
}
else
return NULL;
}

void FillBitmapInfo( BITMAPINFO* bmi, int width, int height, int bpp, int origin )
{
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 = origin ? abs(height) : -abs(height);
bmih->biPlanes = 1;
bmih->biBitCount = (unsigned short)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;
   }
}
}

2 CBitmap转换为IplImage类型

IplImage *CBitmap2IplImage(const CBitmap *pBitmap)
{
DIBSECTION ds;
pBitmap->GetObject(sizeof(ds),&ds);
IplImage *pImage=cvCreateImage(cvSize(ds.dsBm.bmWidth,ds.dsBm.bmHeight),8,ds.dsBmih.biBitCount/8);
memcpy(pImage->imageData,ds.dsBm.bmBits,pImage->imageSize);
return pImage;
}

3.HBITMAP 转换为IplImage

IplImage* hBitmap2Ipl(HBITMAP hBmp)
{

   BITMAPbmp;
   ::GetObject(hBmp,sizeof(BITMAP),&bmp);
    intnChannels = bmp.bmBitsPixel == 1 ? 1 : bmp.bmBitsPixel/8 ;
    int depth =bmp.bmBitsPixel == 1 ? IPL_DEPTH_1U : IPL_DEPTH_8U;
    IplImage*img = cvCreateImage( cvSize(bmp.bmWidth, bmp.bmHeight), depth,nChannels);
   //img->imageData =(char*)malloc(bmp.bmHeight*bmp.bmWidth*nChannels*sizeof(char));
   memcpy(img->imageData,(char*)(bmp.bmBits),bmp.bmHeight*bmp.bmWidth*nChannels);
    returnimg;
}