openCV实现图像切割

桃扇骨 2022-06-12 04:51 204阅读 0赞

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 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;
    }

二、程序运行结果：  
（1）原图像：  
![这里写图片描述][SouthEast]  
（2）切割后图像：  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220612/1990194a09ab40ae8c8b28d03f4d87db.png
[SouthEast 1]: /images/20220612/51575cbdd3f949d89ad80104127649a9.png