人脸识别中截取面部的实现方法

void GetImageRect(IplImage* orgImage, CvRect rectInImage, IplImage* imgRect,double scale)
{
//从图像orgImage中提取一块（rectInImage）子图像imgRect
IplImage *result=imgRect;
CvRect size;
size.x=rectInImage.x*scale;
size.y=rectInImage.y*scale;
size.width=rectInImage.width*scale;
size.height=rectInImage.height*scale;

//result=cvCreateImage( size, orgImage->depth, orgImage->nChannels );
//从图像中提取子图像
cvSetImageROI(orgImage,size);
cvCopy(orgImage,result);
cvResetImageROI(orgImage);
}
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