opencv显示图像并转换成灰度图（c++） day1

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


using namespace cv;
int main()
{
	Mat src=imread("aa.jpg");
	Mat grey;
	if(src.empty())
	{
		printf("加载失败\n");
		return -1;
	}
	imshow("picture",src);
	cvtColor(src,grey,CV_BGR2GRAY);
	imshow("grey",grey);
	waitKey(0);
	return 0;
}