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