do{
		dir = dir % 8;
		int r = pcurrent.x + di[dir];
		int c = pcurrent.y + dj[dir];
		//check if r and c are in the image coordinate space;
		if (r >= 0 && c >= 0 && r <= src->rows && c <= src->cols) {
			//check if the pixel is black
			if (src->at<uchar>(r, c) == 0) {
				//if black, we save the p0->p1, and p1 = new point indentified;
				plast = pcurrent;
				pcurrent = Point(r, c);
				directions.push_back(dir);
				coloredBorder.at<Vec3b>(r, c) = Vec3b(0, 0, 255);

				//we find the new direction to search the next pixel based on its parity;
				if (dir % 2) {
					dir = (dir + 6) % 8;
				}
				else {
					dir = (dir + 7) % 8;
				}
			}
			else {
				//if a black pixel is not found, we search to the next neighbours in the neighbourhood;
				dir++;
			}
		}
		else {
			//not in coordinate space, but we must increment dir;
			dir++;
		}
		 conditionSatisfied = pcurrent.x == p1.x && pcurrent.y == p1.y && plast.x == p0.x && plast.y == p0.y;

	}while (!conditionSatisfied);