void drawLabels(){
	char fname[MAX_PATH];
	while (openFileDlg(fname))
	{
		Mat src = imread(fname, CV_LOAD_IMAGE_GRAYSCALE);
		Mat dest = Mat(src.size(), CV_8UC3);
		int label = 0;
		Mat tLabels = Mat::zeros(src.size(), CV_8UC1);


		for (int i = 1; i < tLabels.rows - 1; i++){
			for (int j = 1; j < tLabels.cols - 1; j++){
				if (src.at<uchar>(i, j) == 0 && tLabels.at<uchar>(i, j) == 0){
					label++;
					std::queue<Point> Q;
					Point p = Point(i, j);
					tLabels.at<uchar>(i, j) = label;
					Q.push(p);
					while (!Q.empty()){
						Point q = Q.front();
						Q.pop();
						for (int k = q.x - 1; k <= q.x + 1; k++){ //pt fiecare vecin din N8
							for (int l = q.y - 1; l <= q.y + 1; l++){
								Point vecin = Point(k, l);
								if (src.at<uchar>(vecin.x, vecin.y) == 0 && tLabels.at<uchar>(vecin.x, vecin.y) == 0 && k != q.x&&l != q.y){
									tLabels.at<uchar>(vecin.x, vecin.y) = label;
									Q.push(vecin);
								}
							}
						}
					}
				}
			}
		}

		Vec3b * culori = (Vec3b*)malloc((label + 1)*sizeof(Vec3b));
		for (int i = 1; i <= label; i++){
			unsigned char R = rand() % 255;
			unsigned char G = rand() % 255;
			unsigned char B = rand() % 255;
			culori[i] = Vec3b(B, G, R);
		}
		for (int i = 0; i < tLabels.rows; i++){
			for (int j = 0; j < tLabels.cols; j++)
			{
				int pozVec = tLabels.at<uchar>(i, j);
				if (pozVec == 0){
					dest.at<Vec3b>(i, j) = Vec3b(255, 255, 255);
				}
				else{
					dest.at<Vec3b>(i, j) = culori[pozVec];
				}
			}
		}

		imshow("src image", src);
		imshow("dest image", dest);
		waitKey(0);
	}
}
uchar minnn(vector<uchar> L){

	uchar mic = L[0];
	for (int i = 0; i <L.size(); i++)
	{
		if (L[i]<mic)
			mic = L[i];
	}
	return mic;
}
void traversalTwoPass(){

	char fname[MAX_PATH];
	while (openFileDlg(fname))
	{
		Mat img = imread(fname, CV_LOAD_IMAGE_GRAYSCALE);
		imshow("src", img);

		int label = 0;
		Mat labelMat = Mat(img.size(), CV_8UC1); //labels

		for (int i = 0; i < img.rows; i++){
			for (int j = 0; j < img.cols; j++){
				labelMat.at<uchar>(i, j) = 0;
			}
		}

		std::queue<Point2i> myqueue;

		vector<vector<int>> edges(10);

		for (int i = 1; i < img.rows-1; i++){
			for (int j = 1; j < img.cols-1; j++){
				if (img.at<uchar>(i, j) == 0 && labelMat.at<uchar>(i, j) == 0){

					vector<uchar> L;

					int di[4] = { -1, 0, 1, 0 };
					int dj[4] = { 0, -1, 0, 1 };

					uchar neighbors[4];

					for (int k = 0; k < 4; k++){
						neighbors[k] = img.at<uchar>(i + di[k], j + dj[k]);
						if (labelMat.at<uchar>(i + di[k], j + dj[k]) > 0){
							L.push_back(labelMat.at<uchar>(i + di[k], j + dj[k]) > 0);
						}
					}

					if (L.size() == 0){
						label++;
						labelMat.at<uchar>(i, j) = label;
					}

					else {
						uchar x = minnn(L);
						labelMat.at<uchar>(i, j) = x;
						for (int y = 0; y <L.size(); y++){
							if (x != y){
								edges[x].push_back(y);
								edges[y].push_back(x);
							}

						}
					}

				}
			}
		}

		int newLabel = 0;
		Vector<uchar> newLabels;
		for (int i = 1; i < label + 1; i++){
			newLabels[i] = 0;
		}

		for (int i = 1; i < label; i++){
			if (newLabels[i] == 0){
				newLabel++;
				std::queue<int> myqueue;

				newLabels[i] = newLabel;

				myqueue.push(i);

				while (!myqueue.empty()){

					int crt = myqueue.front();
					myqueue.pop();
					for (int y = 0; y < edges[crt].size(); y++){
						if (newLabels[y] == 0){
							newLabels[y] = newLabel;
							myqueue.push(y);
						}
					}
				}

			}
		}


		for (int i = 0; i < img.rows; i++){
			for (int j = 0; j < img.cols; j++){
				labelMat.at<uchar>(i, j) = newLabels[labelMat.at<uchar>(i, j)];
			}
		}
		imshow("src2", img);
		waitKey(0);



		Vec3b colors[256] = { 0 };
		colors[0] = Vec3b(255, 255, 255);
		for (int labeldIndex = 1; labeldIndex <= label; labeldIndex++){


			uchar v1 = rand() % 256;
			uchar v2 = rand() % 256;
			uchar v3 = rand() % 256;

			colors[labeldIndex] = Vec3b(v1, v2, v3);
		}

		Mat newImg = Mat(img.rows, img.cols, CV_8UC3);

		for (int i = 0; i < img.rows; i++){
			for (int j = 0; j < img.cols; j++){
				newImg.at<Vec3b>(i, j) = colors[labelMat.at<uchar>(i, j)];
			}
		}

		imshow("src2", newImg);

	}

}