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

using namespace cv;

int main(){
    Mat_<Vec3b> orange = imread("orange1.jpg", IMREAD_COLOR);

    Vec3b black = Vec3b(0,0,0);
    for(int i = 0; i < orange.rows; i++){
        for(int j = 0; j < orange.cols; j++){
            if(orange(i,j)[2] < 164 && !(orange(i,j)[1] < orange(i,j)[2])){
                orange(i,j) = black;
            }
        }
    }

    imshow("img", orange);

    waitKey();
    return 0;
}