OpenCV实现图像转换为漫画效果_Java

OpenCV实现图像转换为漫画效果

本文实例为大家分享了opencv实现图像转换为漫画的具体代码，供大家参考，具体内容如下

from 《opencv by example》

1、先canny提取图像的边缘并强化，翻转边缘为黑色，将像素值转换为0-1的值
2、将图像进行双边滤波处理，然后将像素值缩短为每10个灰度级为一个值
3、将前两步得到的结果相乘，显示结果

#include <iostream>
 
using namespace std;
 
#include "opencv2/core.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/imgproc.hpp"
 
using namespace cv;
 
int main()
{
 mat img = imread("1.jpg");
 float radius = img.cols > img.rows ? (img.rows / 3) : (img.cols / 3);
 
 
 const double exponential_e = exp(1.0);
 /** edges **/
 // apply median filter to remove possible noise
 mat imgmedian;
 medianblur(img, imgmedian, 7);
 // detect edges with canny
 mat imgcanny;
 canny(imgmedian, imgcanny, 50, 150);
 // dilate the edges
 mat kernel = getstructuringelement(morph_rect, size(2, 2));
 dilate(imgcanny, imgcanny, kernel);
 
 // scale edges values to 1 and invert values
 imgcanny = imgcanny / 255;
 imgcanny = 1 - imgcanny;
 // use float values to allow multiply between 0 and 1
 mat imgcannyf;
 imgcanny.convertto(imgcannyf, cv_32fc3);
 // blur the edgest to do smooth effect
 blur(imgcannyf, imgcannyf, size(5, 5));
 
 /** color **/
 // apply bilateral filter to homogenizes color
 mat imgbf;
 bilateralfilter(img, imgbf, 9, 150.0, 150.0);
 // truncate colors
 mat result = imgbf / 25;
 result = result * 25;
 /** merges color + edges **/
 // create a 3 channles for edges
 mat imgcanny3c;
 mat cannychannels[] = { imgcannyf, imgcannyf, imgcannyf };
 merge(cannychannels, 3, imgcanny3c);
 // convert color result to float
 mat resultf;
 result.convertto(resultf, cv_32fc3);
 // multiply color and edges matrices
// cout << imgcanny3c << endl;
 multiply(resultf, imgcanny3c, resultf);
// cout << resultf << endl;
 // convert to 8 bits color
 resultf.convertto(result, cv_8uc3);
 // show image
 imshow("result", result);
 
 waitkey(0);
 
 return 0;
}

原图为：