void CallBackL4(int event, int x, int y, int flags, void *userdata)
{
	Mat* H = (Mat*)userdata;
	if (event == EVENT_RBUTTONDOWN)
	{
		imshow("H", *H);
		int width = (*H).cols;
		int height = (*H).rows;
		Mat labels = Mat::zeros((*H).size(),CV_16UC1);
		Mat dst = Mat::zeros((*H).size(), CV_8UC1);
		queue<Point> que;
		double hue_avg = (*H).at<uchar>(y, x);
		printf("salut");
		int k = 1; //ethiceta curenta
		int N = 1; // numarul de pixeli din regiune
		que.push(Point(y, x)); // adauga element (seed point) in coada
		// acesta primeste eticheta k
		while (!que.empty())
		{ // Retine poz. celui mai vechi element din coada
			Point oldest = que.front();
			que.pop(); // scoate element din coada
			int xx = oldest.y; // coordonatele lui
			int yy = oldest.x;
			// Pentru fiecare vecin al pixelului (xx, yy)
			// Daca abs(hue(vecin) – Hue_avg)<T si labels(vecin) == 0
			// Aduga vecin la regiunea curenta
			// labels(vecin) = k
			// Actualizeaza Hue_avg (medie ponderata)
			// Incrementeza N

			for (int v = -1; v <= 1; v++)
				for (int u = -1; u <= 1; u++)
				{
					if (yy <= height - 1 && xx <= width - 1){
						if (abs((*H).at<uchar>(yy + v, xx +

u) - hue_avg) < 55 && labels.at<uchar>(yy + v, xx + u) == 0){
							que.push(Point(yy + v, xx +

u));
							labels.at<uchar>(yy + v, xx

+ u) = k;
							hue_avg = (N * hue_avg +

(*H).at<uchar>(yy + v, xx + u)) / (N + 1);
							N++;
						}
					}
				}
		}

		for (int i = 0; i < height;i++)
			for (int j = 0; j < width; j++)
			{
				if (labels.at<uchar>(i,j) != 0) {
					dst.at<uchar>(i, j) = 255;
				}
			}
		imshow("dst", dst);

	}
}

void L4_RG()
{
	Mat src;
	Mat channels[3],hsv,H;

	// Read image from file
	char fname[MAX_PATH];
	while (openFileDlg(fname))
	{
		src = imread(fname);

		GaussianBlur(src, src, Size(5, 5), 0, 0);//filtru Gausian
		cvtColor(src, hsv, CV_BGR2HSV);//conversie bgr-> hsv
		split(hsv, channels);//separare hsv
		H = channels[0]*510/360;

		//Create a window
		namedWindow("src", 1);

		//set the callback function for any mouse event
		setMouseCallback("src", CallBackL4, &H);

		//show the image
		imshow("src", src);

		// Wait until user press some key
		waitKey(0);
	}
}