#include <iostream>
#include <vector>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui.hpp>
using namespace std;
using namespace cv;

int main() {
    {
        Mat_<uchar> img = imread("resources/go2.png",IMREAD_GRAYSCALE);
        imshow("eredeti", img);

        Mat_<uchar> dest = Mat::zeros(img.size(), CV_8UC1);

        for (int i = 0; i < img.cols; ++i) {
            for (int o = 0; o < img.rows; ++o) {
                dest(i, o) = abs(img(i, o) - img(i + 1, o + 1)) +
                abs(img(i, o + 1) - img(i + 1, o));
            }
        }
        imshow("elkeres",dest);

        Canny(img,dest,50,160);
        imshow("canny",dest);
    }
    {
        Mat img = imread("resources/go2.png",IMREAD_GRAYSCALE);
        Mat dx, dy, dest;
        Sobel(img,dx,CV_16S,1,0);
        Sobel(img,dy,CV_16S,0,1);
        convertScaleAbs(abs(dx)+abs(dy),dest);
        imshow("dest",dest);
    }
    {
    Mat img = imread("resources/go2.png",IMREAD_GRAYSCALE);
    Mat dest;
    vector<Vec3f> circles; //cx, cy, r
    HoughCircles(img, circles, HOUGH_GRADIENT, 2, 10, 80, 50, 22, 26);
    
    cout << circles.size() << endl;

    cvtColor(img, dest, COLOR_GRAY2BGR);
    for (Vec3f c : circles) {
        if (img.at<uchar>(c[1], c[0]) > 128) {
            circle(dest, Point(c[0], c[1]), c[2], Scalar(0,0,255), 2);
        } else {
        circle(dest, Point(c[0], c[1]), c[2], Scalar(255, 0, 0), 2);
        }
    }

    imshow("korok", dest);
    }
    {
        Mat img = imread("resources/go2.png",IMREAD_GRAYSCALE);
        Mat dest;
        Laplacian(img,dest,CV_16S,3);
        convertScaleAbs(dest,dest);
        imshow("laplacian",dest);
    }
	waitKey();
    return 0;
}