#include <iostream>

#include <opencv2/opencv.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/core/core.hpp>

using namespace std;

using namespace cv;

int main(){

        Mat bgdModel_1, fgdModel_1, bgdModel_2, fgdModel_2;

        Mat image_1 = imread("image.ppm", 1);

        Mat mask_1 = imread("mask.ppm", 0);

        Mat image_2 = imread("image.ppm", 1);

        Mat mask_2 = imread("mask.ppm", 0);

        Rect roi_1(0, 0, 150, 150);

        Rect roi_2(0, 0, 150, 150);

        grabCut(image_1, mask_1, roi_1, bgdModel_1, fgdModel_1, 1, GC_INIT_WITH_MASK);

        grabCut(image_2, mask_2, roi_2, bgdModel_2, fgdModel_2, 1, GC_INIT_WITH_MASK);

        Mat diff;

        compare(mask_1, mask_2, diff, cv::CMP_NE);

        cout << countNonZero(diff) << endl;

}