//3. show the resulting 2D Gaussian probability distribution
		float[][] gaussian_distribution = new float[256][256];
		for (double[] rg_value : rg_values)
		{
			int[] rg = new int[2];
			rg[0] = (int) (rg_value[0]*255);
			rg[1] = (int) (rg_value[1]*255);
			double distance = md.distance(rg_value);
			double prob = Math.exp(-(Math.pow(distance, 2)/2.0));
			gaussian_distribution[rg[0]][rg[1]] += (float) prob;
		}

		FloatProcessor fp_Gaussian_Prob = new FloatProcessor(gaussian_distribution);
		//fp_Gaussian_Prob.setMinAndMax(0.0, 100);
		new ImagePlus("Gaussian probability distribution", fp_Gaussian_Prob).show();