OpenCV--C++图像通道分离与合并

#include
#include
#include
using namespace std;
using namespace cv;



int main()
{
	Mat img = imread("colors.jpg");
	if (img.empty()) {
		cout << "图像读取失败" << endl;
		return -1;
	}

	//一、数组类型的分离与合并
	Mat HSV;
	cvtColor(img, HSV, COLOR_BGR2HSV);
	Mat img_b, img_g, img_r; //存放数组类型结果

	Mat imgs[3];    //对单通道数组进行赋值
	split(img, imgs);
	img_b = imgs[0];
	img_g = imgs[1];
	img_r = imgs[2];

	imshow("B通道", img_b);  //分别展示分离后的R，G，B通道
	imshow("G通道", img_g);
	imshow("R通道", img_r);

	Mat merged[3];
	Mat result;
	merged[0] = img_b;
	merged[1] = img_g;
	merged[2] = img_r;
	merge(merged, 3, result);

	imshow("merged", result);

	//二、vector类型的分离与合并
	vector img_hsv;
	vector merged_hsv;
	Mat result2;
	split(HSV, img_hsv);

	Mat img_h, img_s, img_v;
	img_h = img_hsv.at(0);
	img_s = img_hsv.at(1);
	img_v = img_hsv.at(2);

	imshow("hsv", HSV);      //展示原始的HSV图像
	imshow("H通道", img_h);  //分别展示分离后的H，S，V通道
	imshow("S通道", img_s);
	imshow("V通道", img_v);

	merged_hsv.push_back(img_h);
	merged_hsv.push_back(img_s);
	merged_hsv.push_back(img_v);

	merge(merged_hsv, result2);
	imshow("result2", result2);  //合并后的hsv通道图像
    
	waitKey(0);
	return 0;
}

参考资料：

《OpenCV4快速入门》

GitHub - fengzhenHIT/learnOpenCV4: OpenCV 4相关文件