#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 patch
void 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;
}