opencv——设置ROI区域

#include "stdafx.h"
#include<opencv2\opencv.hpp>
#include<opencv\cv.h>
#include <iostream>
#include<string>
 using namespace std;
 using namespace cv;

int _tmain(int argc, _TCHAR* argv[])
{
    IplImage *src=cvLoadImage("lena.jpg",-);//读入图像
    IplImage *dst;
    CvRect ROI_rect_src;
    CvRect ROI_rect_dst;
    cvNamedWindow("src",CV_WINDOW_AUTOSIZE);
    cvMoveWindow("src",,);
    cvShowImage("src",src);//输出未定位ROI的图像
    //cvWaitKey(0);  

    ROI_rect_src.x=src->width/;
    ROI_rect_src.y=src->height/;
    ROI_rect_src.width=;
    ROI_rect_src.height=;
    cvSetImageROI(src,ROI_rect_src);
    cout<<"输出图像区域"<<endl;
    cvSaveImage("ROI.bmp",src);

    cout<<(src->roi->xOffset)<<""<<(src->roi->yOffset)<<endl;
    cout<<(src->roi->width)<<""<<(src->roi->height)<<endl;
    cvShowImage("sr",src);//输出设定ROI以后的图像
    //cvWaitKey(0);
    dst=cvCloneImage(src);//复制出ROI区域的图像
    ROI_rect_dst=cvGetImageROI(src);//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",,);
    cvShowImage("dst",dst);
    cvWaitKey();  

    cvResetImageROI(dst);//释放目标图像的ROI
    cvShowImage("dst",dst);
    cvWaitKey();
    cvReleaseImage(&src);
    cvReleaseImage(&dst);  

    return ;
}