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  • OpenCV——马赛克

    具体的算法可以参考:

    PS 滤镜 马赛克

    // define head function
    #ifndef PS_ALGORITHM_H_INCLUDED
    #define PS_ALGORITHM_H_INCLUDED
    
    #include <iostream>
    #include <string>
    #include "cv.h"
    #include "highgui.h"
    #include "cxmat.hpp"
    #include "cxcore.hpp"
    
    using namespace std;
    using namespace cv;
    
    
    void Show_Image(Mat&, const string &);
    
    
    #endif // PS_ALGORITHM_H_INCLUDED
    
    /*
    This program will generate
     "Mosaic" effect.
    
    */
    
    #include "PS_Algorithm.h"
    #include <time.h>
    
    using namespace std;
    using namespace cv;
    
    int main(void)
    {
        string Img_name("4.jpg");
        Mat Image_in;
        Image_in=imread(Img_name);
        // Show_Image(Image_in, Img_name);
    
        Mat Image_out(Image_in.size(), CV_32FC3);
        Image_in.convertTo(Image_out, CV_32FC3);
    
        int P_size=9;
        float k1, k2;
    
        int n_row;
        int n_col;
    
        float m, n;
    
        int h,w;
    
        n_row=Image_in.rows;
        n_col=Image_in.cols;
    
        Mat sub_mat;
    
        srand( (unsigned)time(NULL) );
    
        for (int i=P_size; i<Image_in.rows-P_size-1; i=i+P_size)
        {
            for (int j=P_size; j<Image_in.cols-1-P_size; j=j+P_size)
            {
                k1=(double)((rand() % 100))/100.0-0.5;
                k2=(double)((rand() % 100))/100.0-0.5;
    
                m=(k1*(P_size*2-1));
                n=(k2*(P_size*2-1));
    
                h=(int)(i+m)% n_row;
                w=(int)(j+n)% n_col;
    
                sub_mat=Image_out.operator()(Range(i-P_size,i+P_size), Range(j-P_size,j+P_size));
    
                sub_mat.setTo(Scalar(Image_in.at<Vec3b>(h,w)));
    
            }
        }
    
        Image_out=Image_out/255.0;
    
        Show_Image(Image_out, "out");
    
        imwrite("out.jpg", Image_out*255);
    
        waitKey();
        cout<<"All is well."<<endl;
    
    }
    
    
    // define the show image
    #include "PS_Algorithm.h"
    #include <iostream>
    #include <string>
    
    using namespace std;
    using namespace cv;
    
    void Show_Image(Mat& Image, const string& str)
    {
        namedWindow(str.c_str(),CV_WINDOW_AUTOSIZE);
        imshow(str.c_str(), Image);
    
    }
    


    原图 



    效果图


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  • 原文地址:https://www.cnblogs.com/mtcnn/p/9412657.html
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