opencv图片读取和编译

import cv2 as cv

img = cv.imread(‘/home/sensetime/000000_10.png‘,-1)
cv.imwrite("aaa.png",img)

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


using namespace std;
using namespace cv;


int main(){
    string img_dir = "/home/sensetime/000000_10.png";
    cv::Mat img = cv::imread(img_dir,0);
    cout << "type: " << img.type() << endl;
    int col = img.cols;
    int row = img.rows;　
    int channels = img.channels();
    for(int i = 0;i < row;i++){
        for(int j = 0;j < col;j++){

            cout << "i: " << i << " j: " << j << " pixel: " << int(img.at<ushort>(i,j)) << endl;
        }
    }





    return 0;
}