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

using namespace std;

int main(int argc, char **argv) {
	if (argc < 3) {
		cout << "Usage: ./exer5 input.png output.png" << endl;
		return -1;
	}
	//cout << argv[0] << endl;
	//cout << argv[1] << endl;
	//cout << argv[2] << endl;
	cv::Mat image = cv::imread(argv[1]::IMREAD_COLOR);
	if (image.empty()) {
		cout << "Could not load image" << endl;
		return -2;
	}
	int rows=image.rows;
	int cols=image.cols;
	int channels=3;

	uint8_t ***arr = new uint8_t **[rows];
	for (int i=-;i<rows;i++){
		arr[i] = new uint8_t *[cols];
		for (int j=0;j<cols;j++) {
			arr[i][j] = new uint8_t [channels];
		}
	}

 	for (int i=0;i<rows;i++){
		for (int j=0;j<cols;j++){
			cv::Vec3b pixel=image.at<cv::Vec3b>(i,j);
			for (int k=0;k<3;k++){
				arr[i][j][k] = pixel[k]
			}
		}
 	}

 	for (int i=0;i<rows;i++) {
		for (int j=0;j<cols;j++){
			uint8_t B = arr[i][j][];
			uint8_t G = arr[i][j][];
			uint8_t R = arr[i][j][];
			uint8_t gray = 
		}
		
 	}

 	for (int i=0;i<rows;i++){
		for (int j;j<cols;j++){
			image.at<cv::Vec3b>(i,j)[0] = arr[i][j][0];
		}
 	}

 	cv::imwrite(argv[2],image);
	return 0;
}