OpenCV：设置图像的感兴趣区域(ROI)

新函数用红色显示，程序为：

#include <highgui.h>

#include <cv.h>

#include <iostream.h>

void main()

{

IplImage * src=cvLoadImage("baboon.jpg",-1);

IplImage * dst;

CvRect roi_rect_src;

CvRect roi_rect_dst;

cvNamedWindow("src",CV_WINDOW_AUTOSIZE);

cvMoveWindow("src",200,200); //设置窗口输出位置

cvShowImage("src",src);

cvWaitKey(0);

//基于给定的矩形设置感兴趣区域ROI

roi_rect_src.x=125;

roi_rect_src.y=300;

roi_rect_src.width=240;

roi_rect_src.height=200;

cvSetImageROI(src,roi_rect_src);

cout<<"输出源图像的ROI区域:"<<endl;

cout<<(src->roi->xOffset)<<" "<<(src->roi->yOffset)<<endl;

cout<<(src->roi->width)<<" "<<(src->roi->height)<<endl;

cvShowImage("src",src);//这时候只显示ROI区域

cvWaitKey(0);

dst=cvCloneImage(src);//完整复制包括头,ROI和数据

roi_rect_dst=cvGetImageROI(dst);//获得ROI区域

cout<<"输出目标图像的ROI区域:"<<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",600,200);

cvShowImage("dst",dst);

cvWaitKey(0);

cvResetImageROI(dst);//释放图像的ROI

cvShowImage("dst",dst);

cvWaitKey(0);

cvReleaseImage(&src);

cvReleaseImage(&dst);

}

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这只狒狒也是标准测试图，它的名字叫baboon，在图像处理中有很高的地位。

程序中将它的鼻子作为ROI。

#opencv和目标跟踪