作者：翟天保Steven
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实现原理

连环画效果可以通过调整RGB三通道数值实现，具体公式：

$\\\\R=abs(G-B+G+R)*R/256 \\\\G=abs(B-G+B+R)*R/256 \\\\B=abs(B-G+B+R)*R/256$

取计算后的RGB数值平均值作为新图像的B值，取平均值+10的数值作为R值和G值。

计算过程中出现0以下或者255以上的数值，将其调整为0或255。

功能函数代码

// 连环画
cv::Mat ComicStrip(cv::Mat src)
{	
	CV_Assert(src.channels() == 3);
	int row = src.rows;
	int col = src.cols;
	cv::Mat temp = src.clone();
	for (int i = 0; i < row; ++i)
	{
		uchar *s = src.ptr<uchar>(i);
		uchar *t = temp.ptr<uchar>(i);
		for (int j = 0; j < col; ++j)
		{
			int B = s[3 * j];
			int G = s[3 * j + 1];
			int R = s[3 * j + 2];
			// 连环画效果
			int newB = abs(B - G + B + R)*R / 256;
			int newG = abs(B - G + B + R)*R / 256;
			int newR = abs(G - B + G + R)*R / 256;

			newR = max(0, min(newR, 255));
			newG = max(0, min(newG, 255));
			newB = max(0, min(newB, 255));

			int gray = (newR + newG + newB) / 3;

			int T = min(255, gray + 10);

			t[3 * j] = gray;
			t[3 * j + 1] = T;
			t[3 * j + 2] = T;
		}
	}
	return temp;
}

C++测试代码

#include <iostream>
#include <string>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

cv::Mat ComicStrip(cv::Mat src);

int main()
{
	cv::Mat src = imread("test2.jpg");
	cv::Mat gray;
	cvtColor(src, gray, COLOR_BGR2GRAY);
	cv::Mat result = ComicStrip(src);
	cv::imshow("original", src);
	cv::imshow("gray", gray);
	cv::imshow("result", result);
	waitKey(0);
	return 0;
}

// 连环画
cv::Mat ComicStrip(cv::Mat src)
{	
	CV_Assert(src.channels() == 3);
	int row = src.rows;
	int col = src.cols;
	cv::Mat temp = src.clone();
	for (int i = 0; i < row; ++i)
	{
		uchar *s = src.ptr<uchar>(i);
		uchar *t = temp.ptr<uchar>(i);
		for (int j = 0; j < col; ++j)
		{
			int B = s[3 * j];
			int G = s[3 * j + 1];
			int R = s[3 * j + 2];
			// 连环画效果
			int newB = abs(B - G + B + R)*R / 256;
			int newG = abs(B - G + B + R)*R / 256;
			int newR = abs(G - B + G + R)*R / 256;

			newR = max(0, min(newR, 255));
			newG = max(0, min(newG, 255));
			newB = max(0, min(newB, 255));

			int gray = (newR + newG + newB) / 3;

			int T = min(255, gray + 10);

			t[3 * j] = gray;
			t[3 * j + 1] = T;
			t[3 * j + 2] = T;
		}
	}
	return temp;
}