IplImage和Bitmap都是内存图形的表示方法,前者是OpenCV开源视觉库的,后者是GDI+的。如果在VC中使用OpenCV库的话,很可能会用到这两者的转换。
在网上搜索这两种格式转换的话,很有可能会搜索到有内存泄露的版本(比如 http://blog.csdn.net/jtujtujtu/article/details/3734722),因此在此提供了没有内存泄露的版本供大家参考。
【注意】使用GDI+的FromBITMAPINFO函数会导致内存泄露!
IplImage* Bitmap2IplImage(Bitmap* pBitmap)
{
if (!pBitmap)
return NULL;
int w = pBitmap->GetWidth();
int h = pBitmap->GetHeight();
BitmapData bmpData;
Rect rect(0,0,w,h);
pBitmap->LockBits(&rect, ImageLockModeRead, PixelFormat24bppRGB, &bmpData);
BYTE* temp = (bmpData.Stride>0) ? ((BYTE*)bmpData.Scan0) : ((BYTE*)bmpData.Scan0 + bmpData.Stride*(h-1));
IplImage* pIplImg = cvCreateImage(cvSize(w, h), IPL_DEPTH_8U, 3);
if (!pIplImg)
{
pBitmap->UnlockBits(&bmpData);
return NULL;
}
memcpy(pIplImg->imageData, temp, abs(bmpData.Stride)*bmpData.Height);
pBitmap->UnlockBits(&bmpData);
//判断Top-Down or Bottom-Up
if (bmpData.Stride<0)
cvFlip(pIplImg, pIplImg);
return pIplImg;
}
// pBitmap 同样需要外部释放Bitmap* IplImage2Bitmap(IplImage* pIplImg){if(!pIplImg)return NULL; Bitmap *pBitmap = new Bitmap(pIplImg->width, pIplImg->height, PixelFormat24bppRGB);if (!pBitmap)return NULL; BitmapData bmpData;Rect rect(0, 0, pIplImg->width, pIplImg->height);pBitmap->LockBits(&rect, ImageLockModeWrite, PixelFormat24bppRGB, &bmpData);BYTE *pByte = (BYTE*)bmpData.Scan0; if (pIplImg->widthStep == bmpData.Stride) //likelymemcpy(bmpData.Scan0, pIplImg->imageDataOrigin, pIplImg->imageSize); pBitmap->UnlockBits(&bmpData);return pBitmap;}
转自:http://www.leewei.org/?p=1009