sobel_edge

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

using namespace cv;
using namespace std;

void sobel_edge() {
	Mat src = imread("family.jpg",IMREAD_GRAYSCALE);

	if (src.empty()) {
		cerr << "Image load failed!" << endl;
		return ;
	}

	Mat dx, dy;
	Sobel(src, dx, CV_32FC1, 1, 0);
	Sobel(src, dy, CV_32FC1, 0, 1);

	Mat fmag, mag;
	magnitude(dx, dy, fmag);
	fmag.convertTo(mag, CV_8UC1);

	Mat edge = mag > 150;

	imshow("src", src);
	imshow("mag", mag);
	imshow("edge", edge);

	waitKey();
	destroyAllWindows();
}

int main() {
	sobel_edge();
	return 0;
}