感兴趣区域ROI 和 替换算法

#pragma comment(lib,"cxcore.lib")#pragma comment(lib,"cv.lib")#pragma comment(lib,"highgui.lib")#pragma comment(lib,"ml.lib")#pragma comment(lib,"cvcam.lib")#pragma comment(lib,"cvaux.lib")#include <stdio.h>#include <iostream>#include <cv.h>#include <cxcore.h>#include <highgui.h>using namespace std;int main(){//头像替换IplImage* img=cvLoadImage("img//big.jpg");IplImage* sub_img=cvLoadImage("img//sub.jpg");CvRect rect;rect.x=190;rect.y=10;rect.width=sub_img->width;rect.height=sub_img->height;//自定义算法 实现方式for (int y=0;y<sub_img->height;y++){unsigned char* r_subimg=(uchar*)(sub_img->imageData + y*sub_img->widthStep);unsigned char* r_img=(uchar*)(img->imageData +  (y + rect.y)* img->widthStep);for (int x=0;x<sub_img->width;x++){//r_img[3*(x+rect.x) + 0]=r_subimg[3*x + 0];r_img[3*(x+rect.x) + 1]=r_subimg[3*x + 1];r_img[3*(x+rect.x) + 2]=r_subimg[3*x + 2];}}//利用opencv函数实现// cvSetImageROI(img,rect);//ROI 感兴趣区域// cvCopy(sub_img,img);// cvResetImageROI(img);cvNamedWindow("big");cvShowImage("big",img);// cvNamedWindow("sub");// cvShowImage("sub",sub_img);cvWaitKey(0);return 0;}