#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <iostream>

using namespace cv;

int main(){
    Mat img = imread("milka.jpg", IMREAD_COLOR);
    Mat hsv;
    Mat dest;
    Mat dest2;

    cvtColor(img, hsv, COLOR_BGR2HSV);
    Mat_<Vec3b> hs = hsv;
    Vec3b c;
    
    for(int i = 0; i < img.rows; i++){
        for(int j = 0; j < img.cols; j++){
            c = hsv.at<Vec3b>(i,j);
            if(c[0] > 120){
                hsv.at<Vec3b>(i,j)[0] = 0; //h csatornan mindent 0-ra szinezunk
            }
        }
    }

    for(auto& c : hs){
        if(c[0] > 120){
            c[0] = 0;
        }
    }

    cvtColor(hsv, dest, COLOR_HSV2BGR);
    cvtColor(hs, dest2, COLOR_HSV2BGR);
    imshow("img", img);
    imshow("hsv", dest);
    imshow("hs", dest2);


    waitKey();

    return 0;
}