OpenCV学习——ROI区域

#include "highgui.h"#include "cv.h"#include <iostream.h>void main(){    IplImage *src=/blog.armyourlife.info/cvLoadImage("lena.jpg",-1);//读入图像    IplImage *dst;    CvRect ROI_rect_src;    CvRect ROI_rect_dst;    cvNamedWindow("src",CV_WINDOW_AUTOSIZE);    cvMoveWindow("src",200,200);    cvShowImage("src",src);//输出未定位ROI的图像    cvWaitKey(0);        ROI_rect_src.x=src->width/2;    ROI_rect_src.y=src->height/2;    ROI_rect_src.width=200;    ROI_rect_src.height=200;    cvSetImageROI(src,ROI_rect_src);    cout<<"输出图像区域"<<endl;    cout<<(src->roi->xOffset)<<""<<(src->roi->yOffset)<<endl;    cout<<(src->roi->width)<<""<<(src->roi->height)<<endl;    cvShowImage("src",src);//输出设定ROI以后的图像    dst=cvCloneImage(src);//复制出ROI区域的图像    ROI_rect_dst=cvGetImageROI(dst);//得到图像的ROI区域    cout<<"输出目标图像的ROI"<<endl;    cout<<ROI_rect_dst.x<<" "<<ROI_rect_dst.y<<endl;    cout<<ROI_rect_dst.width<<" "<<ROI_rect_dst.height<<endl;    cvNamedWindow("dst",CV_WINDOW_AUTOSIZE);    cvMoveWindow("dst",400,200);    cvShowImage("dst",dst);    cvWaitKey(0);    cvResetImageROI(dst);//释放目标图像的ROI    cvShowImage("dst",dst);    cvWaitKey(0);    cvReleaseImage(&src);    cvReleaseImage(&dst);}

http://blog.csdn.net/gnuhpc/article/details/4259467