openCV实现图像切割

openCV实现将图像切成m*n块：
一、代码部分：

#include "stdafx.h"#include <opencv2/core/core.hpp>#include <opencv2/highgui/highgui.hpp>#include <iostream>  #include <vector>  #include<string>#include<sstream>using namespace std;using namespace cv;//Cut an image into m*n patchvoid Cut_img(Mat src_img, int m, int n, vector<Mat> ceil_img){    int t = m * n;    int height = src_img.rows;    int width = src_img.cols;    int ceil_height = height / m;    int ceil_width = width / n;    Mat roi_img;    //String concatenation    ostringstream oss;    string  str, str1, str2;    Point p1, p2;    for (int i = 0; i<m; i++)    {        for (int j = 0; j<n; j++)        {            Rect rect(j*ceil_width, i*ceil_height, ceil_width, ceil_height);            src_img(rect).copyTo(roi_img);            ceil_img.push_back(roi_img);            oss << i;                       str1 = oss.str();            oss.str("");            oss << j;            str2 = oss.str();            oss.str("");            str = "roi_img_" + str1 + "_" + str2;            imshow(str, roi_img);            IplImage *ipl_roi_img=&IplImage(roi_img);            //save processed img            char tmp[100]="\0";            sprintf(tmp,"..\\post_img\\71253_%d_%d.jpg",i,j);            cvSaveImage(tmp,ipl_roi_img);        }    }}int _tmain(int argc, _TCHAR* argv[]){    char *img_name_path="..\\image\\71253.jpg";    Mat img = imread(img_name_path,1);    imshow("src_img", img);    waitKey(0);    int m = 2;    int n = 2;    vector<Mat> ceil_img ;    Cut_img(img, m, n, ceil_img);    cvWaitKey(0);    return 0;}

二、程序运行结果：
（1）原图像：

（2）切割后图像：