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void showMaskPart(const IplImage* src, const IplImage* mask, IplImage* result) { /* src is the source image which you want to mask * mask is a single channel binary image as a mask * result is the image with the same size, depth, channel with src */ cvZero(result); CvSize sz = cvSize(src->width, src->height); IplImage* refImg = cvCreateImage(sz, src->depth, src->nChannels); cvZero(refImg); cvOr(src, refImg, result, mask); cvReleaseImage(&refImg); }