opencv—提取图像RGB各个通道分量

#include<iostream>#include<opencv2/opencv.hpp>using namespace cv;using namespace std;int main(){    Mat orig;    orig = imread("1.jpg");    if (orig.empty())        cout << "读入失败" << endl;    imshow("original", orig);    vector<Mat>m;    split(orig, m); //提取通道信息，但是当未把其他通道设置为0时显示为灰度图，但各通道信息不同    vector<Mat>Rchannels, Gchannels, Bchannels;    //提取通道信息，把orig的通道数据复制到channals    split(orig, Rchannels);    split(orig, Gchannels);    split(orig, Bchannels);    //将其他通道信息设置为0    Rchannels[1] = 0;    Rchannels[2] = 0;    Gchannels[0] = 0;    Gchannels[2] = 0;    Bchannels[0] = 0;    Bchannels[1] = 0;    //合并通道信息    merge(Rchannels, m[0]);    merge(Gchannels, m[1]);    merge(Bchannels, m[2]);    //显示各通道信息    imshow("B",m[0]);    imshow("G",m[1]);    imshow("R",m[2]);    waitKey(0);    return 0;}