OpenCV 读RGB图像然后转换成灰度并保存成灰度图

1、imread 读入图像，最后一个参数0表示按灰度读入

2、imwrite 保存成新的图像

#include <iostream>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/core/core.hpp>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
int main(int argc, char *argv[])
{
    cout<<argc<<endl;
    cout<<argv[0]<<endl;
    Mat image = imread("pathPlanningPlatform.png", 0);
    namedWindow("picture1", CV_WINDOW_AUTOSIZE);
    cout<<"Image In Rows : "<<image.rows<<endl;
    cout<<"Image In Columns : "<<image.cols<<endl;
    imshow("picture1", image);
    waitKey(0);
    imwrite("pathPlanningPlatformOut.png",image);
    return 0;
}