#include <iostream>
#include <opencv2/opencv.hpp>
#include "opencv2/imgproc/imgproc.hpp"
#include <string>
using namespace std;
using namespace cv;
int main(){
string path = "F:/";
Mat img = imread(path+"000586.jpg");
Mat out_img = img.clone();
Mat_<Vec3b>::iterator it = out_img.begin<Vec3b>();
Mat_<Vec3b>::iterator itend = out_img.end<Vec3b>();
int a, b;
a = out_img.size[0];
b = out_img.size[1];
cout << a << " " <<b<< endl; //原图的宽和高
for (; it < itend; it++){ //对R通道的每个像素进行处理:大于125置255;小于或等于置0;
if ((*it)[0]>125) (*it)[0] = 255;
else (*it)[0] = 0;
}
vector<Mat> channels; //通道分离
split(img, channels);
Mat image1 = channels.at(0);
vector<Mat> channels2;
split(out_img, channels2);
Mat image2 = channels2.at(0);
namedWindow("ori");
imshow("ori", image1);
waitKey(0);
namedWindow("test");
imshow("test", image2);
//通道合并
Mat mergeImage;
merge(channels2, mergeImage);
imshow("合并", mergeImage);
waitKey(0);
return 0;
}