OpenCV——非线性滤波器

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参考：
PS 图像特效，非线性滤波器
// 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 "Paint" 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);    Mat r(Image_in.size(), CV_32FC1);    Mat g(Image_in.size(), CV_32FC1);    Mat b(Image_in.size(), CV_32FC1);    Mat rgb[]={b,g,r};    split(Image_out, rgb);    int P_size=3;    Mat sub_mat;    double min_val;    for (int i=P_size; i<Image_in.rows-P_size-1; i++)    {        for (int j=P_size; j<Image_in.cols-1-P_size; j++)        {            for(int k=0; k<3; k++)            {                sub_mat=rgb[k].operator()(Range(i-P_size,i+P_size), Range(j-P_size,j+P_size));                cv::minMaxLoc(sub_mat, &min_val);                Image_out.at<Vec3f>(i,j)[k]=min_val;            }            /*            sub_mat=b.operator()(Range(i-P_size,i+P_size), Range(j-P_size,j+P_size));            cv::minMaxLoc(sub_mat, min_val);            Image_out.at<Vec3f>(i,j)[0]=*min_val;            sub_mat=g.operator()(Range(i-P_size,i+P_size), Range(j-P_size,j+P_size));            cv::minMaxLoc(sub_mat, min_val);            Image_out.at<Vec3f>(i,j)[1]=*min_val;            sub_mat=r.operator()(Range(i-P_size,i+P_size), Range(j-P_size,j+P_size));            cv::minMaxLoc(sub_mat, min_val);            Image_out.at<Vec3f>(i,j)[2]=*min_val;            */        }    }    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);}
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