OpenCV实现模板匹配：代码示例

int mobanpipei()
{
char imageName1[] = "F:\\2015302590025 数图实习\\test-imgs\\小图_模板.bmp";   
char imageName2[] = "F:\\2015302590025 数图实习\\test-imgs\\小图.bmp"; 
Mat M1=imread(imageName1,IMREAD_GRAYSCALE);   // 读入图片 
Mat M2=imread(imageName2,IMREAD_GRAYSCALE);   // 读入图片 
if(M1.empty())     // 判断文件是否正常打开  
{
fprintf(stderr, "Can not load image %s\n", imageName1);
waitKey(6000);  // 等待6000 ms后窗口自动关闭   
return -1;
}
if(M2.empty())     // 判断文件是否正常打开  
{
fprintf(stderr, "Can not load image %s\n", imageName2);
waitKey(6000);  // 等待6000 ms后窗口自动关闭   
return -1;
}
//获取图像行列
int nr1 = M1.rows; //number of rows
int nc1 = M1.cols; //number of colums  
int nr2 = M2.rows; //number of rows
int nc2 = M2.cols; //number of colums  
Mat D = Mat::zeros(nr2-nr1,nc2-nc1, CV_32S);
int T,ii,jj;
for (int i=0;i<nr2-nr1;i++)
{
for (int j=0;j<nc2-nc1;j++)
{
for (int m=0;m<nr1;m++)