1359-1

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

using namespace cv;
using namespace std;



int main()
{
	Mat img_color = imread("image.jpg", IMREAD_COLOR);


	int height = img_color.rows;
	int width = img_color.cols;


	Mat img_grayscale(height, width, CV_8UC1);


	for (int y = 0; y < height; y++) {

		uchar* pointer_input = img_color.ptr<uchar>(y);
		uchar* pointer_ouput = img_grayscale.ptr<uchar>(y);
		for (int x = 0; x < width; x++) {

            // 컬러영상의 경우 픽셀값 읽어오기
			uchar b = pointer_input[x * 3 + 0];
			uchar g = pointer_input[x * 3 + 1];
			uchar r = pointer_input[x * 3 + 2];

            //그레이스케일의 경우 픽셀값 저장하기
			pointer_ouput[x] = (r + g + b) / 3.0;
		}
	}


	imshow("color", img_color);
	imshow("grayscale", img_grayscale);

	waitKey(0);


	return 0;
}