// 1 - show r/g values
		double [] r_values = new double[rg_values.size()];
		double [] g_values = new double[rg_values.size()];
		for (int j = 0; j < rg_values.size(); j++)
		{
			r_values[j] = rg_values.get(j)[0];
			g_values[j] = rg_values.get(j)[1];
		}
		FloatProcessor fp_r_values = new FloatProcessor(ip.getWidth(), ip.getHeight(), r_values);
		new ImagePlus("r(u,v)", fp_r_values).show();
		FloatProcessor fp_g_values = new FloatProcessor(ip.getWidth(), ip.getHeight(), g_values);
		new ImagePlus("g(u,v)", fp_g_values).show();