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

using namespace std;
using namespace cv;

int main() {

	Mat in_image, out_image;
	in_image = imread("C:\\Users\\67231\\Desktop\\NASA_LS.png", IMREAD_UNCHANGED);//IMREAD_UNCHANGED表示存储到内存的影像不会改变
	
	//判断影像是否读入
	if (in_image.empty()) {
		cout << "报错！影像未被读入..." << endl;
		return -1;
	}

	//创建两个窗口
	namedWindow("窗口1", 0);
	namedWindow("窗口2", 0);

	//在创建的窗口中显示图像
	imshow("窗口1", in_image);

	// 将BGR颜色转为灰度图像
	cvtColor(in_image, out_image, COLOR_BGR2GRAY);
	imshow("窗口2", out_image);
    // 等待...
	waitKey();

	imwrite("C:\\Users\\67231\\Desktop\\NASA_LS_gray.png", out_image);
	return 0;

}