public static void DrawOddsRatioImage()
	{
		System.out.println("face vs non-face odds ratio image:");
		for(int i = 0; i < FACE_HEIGHT; i++)
		{
			for(int j = 0; j < FACE_WIDTH; j++)
			{
				double odds = Math.log(isFaceProbilities[i][j]/nonFaceProbilities[i][j]);
				String denote = "#";
				if(odds >= -0.05 && odds <= 0.05)
				{
					denote = " ";
				}else if(odds > 0)
				{
					denote = "+";
				}else if(odds < 0)
				{
					denote = "-";
				}
				System.out.print(denote);
			}
			System.out.println();
		}
	}