具體的算法原理可以參考：

PS濾鏡，素描算法

// 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"Sketch" 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 I(Image_in.size(), CV_32FC1);cv::cvtColor(Image_out, I, CV_BGR2GRAY);I=I/255.0;// Show_Image(I, "gray");Mat I_invert;I_invert=-I+1.0;// Show_Image(I_invert, "Inv");Mat I_gau;GaussianBlur(I_invert, I_gau, Size(25,25), 0, 0);//Show_Image(I_gau, "gau1");float delta=0.01;I_gau=-I_gau+1.0+delta;//Show_Image(I_gau, "gau");Mat I_dst;cv::divide(I, I_gau, I_dst);I_dst=I_dst;Show_Image(I_dst, "dst");Mat b(Image_in.size(), CV_32FC1);Mat g(Image_in.size(), CV_32FC1);Mat r(Image_in.size(), CV_32FC1);Mat rgb[]={b,g,r};float alpha=0.75;r=alpha*I_dst+(1-alpha)*200.0/255.0;g=alpha*I_dst+(1-alpha)*205.0/255.0;b=alpha*I_dst+(1-alpha)*105.0/255.0;cv::merge(rgb, 3, Image_out);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);}

原圖?

效果圖

轉載于:https://www.cnblogs.com/muyuge/p/6152351.html

總結

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