opencv 单目标模板匹配（只适用于模板与目标尺度相同）

#include <iostream>  
#include "opencv/cv.h"  
#include "opencv/cxcore.h"  
#include "opencv/highgui.h"  
using namespace std;  


#pragma comment ( lib,"opencv_highgui244.lib" )
#pragma comment ( lib,"opencv_core244.lib" )
#pragma comment ( lib,"opencv_imgproc244.lib" )




int main()  
{  
    IplImage *src = cvLoadImage("src.jpg", 0);  
    IplImage *srcResult = cvLoadImage("src.jpg", 3);  //用来显示  
    IplImage *templat = cvLoadImage("template1.png", 0);  
    IplImage *result;  
    if(!src || !templat)  
    {  
        cout << "打开图像失败"<< endl;  
        return 0;  
    }  
    int srcW, srcH, templatW, templatH, resultH, resultW;  
    srcW = src->width;  
    srcH = src->height;  
    templatW = templat->width;  
    templatH = templat->height;  
    if(srcW < templatW || srcH < templatH)  
    {  
        cout <<"原图不能比模板小" << endl;  
        return 0;  
    }  
    resultW = srcW - templatW + 1;  
    resultH = srcH - templatH + 1;  
    result = cvCreateImage(cvSize(resultW, resultH), 32, 1);   


	//the 3rd parameter 
    cvMatchTemplate(src, templat, result, CV_TM_SQDIFF);     
    double minValue, maxValue;  
    CvPoint minLoc, maxLoc;  
    cvMinMaxLoc(result, &minValue, &maxValue, &minLoc, &maxLoc);    
    cvRectangle(srcResult, minLoc, cvPoint(minLoc.x + templatW, minLoc.y+ templatH), cvScalar(0,0,255));  
    cvNamedWindow("srcResult", 0);  
    cvNamedWindow("templat", 0);  
    cvShowImage("srcResult", srcResult);  
    cvShowImage("templat", templat);  
    cvWaitKey(0);  
    cvReleaseImage(&result);  
    cvReleaseImage(&templat);  
    cvReleaseImage(&srcResult);  
    cvReleaseImage(&src);  
    return 0;  
}