创建过图片之后一定要释放。

IplImage *pGRAY = cvCreateImage(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight),IPL_DEPTH_8U,1);//创建单通道的位深为8位的IplImage格式的图象

与之对应的要用cvReleaseImage(&pGRAY); 来释放。

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IplImage* img=cvCreateImageHeader(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight),IPL_DEPTH_8U,3);//创建IplImage类型的头。

与之对应要用cvReleaseImageHeader(&pGRAY); 来释放。