OpenCV——马赛克

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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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