#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=0;i<rows;i++){
		
	}

	//transform

	for (int i=0;i<rows;i++){
		for (int j=0;j<cols;j++){
			uint8_t B = arr[i][j][0];
			G
			R
			gray
		}
	}
	//copyback
	for (int i=0;i<rows;i++){
		for(int j=0;j<cols;j++){
			image.at<cv::Vec3b>(i,j)[0] = arr[i][j][0];
		}
	}
	
	cv::imwrite(argv[2],image);
	return 0;
}