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;
}