【03】图像灰度化(opencv4.2.0+VS2019)

/*图像灰度化*/

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

using namespace std;
using namespace cv;

Mat src, gray;

int main()
{
	src = imread("E:\\Image_Processing\\pics\\1.jpg");

	if (src.empty())
	{
		cout << "没有读取到图像" << endl;
		return -1;
	}

	namedWindow("源图像", WINDOW_AUTOSIZE);
	imshow("源图像", src);

	//cvtColor(src, gray, COLOR_RGB2GRAY);

	int row = src.rows;
	int col = src.cols;

	gray.create(row, col, CV_8UC1);

	for (int i = 0; i < row; i++)
	{
		for (int j = 0; j < col; j++)
		{
			gray.at<uchar>(i,j)= src.at<Vec3b>(i, j)[0] * 0.144 + src.at<Vec3b>(i, j)[1] * 0.587 + src.at<Vec3b>(i, j)[2] * 0.299;
		}
	}

	namedWindow("灰度图", WINDOW_AUTOSIZE);
	imshow("灰度图", gray);

	waitKey(0);
	return 0;
}