1. A method of generating a lookup table of correction values used to compensate for errors in converting a color image to a grayscale image, the method comprising: generating a reference image having pixels with color values in an RGB color space; converting a first copy of the reference image to a grayscale reference image via interpolation; converting a second copy of the reference image to an intermediate image, wherein the intermediate image comprises pixels in an intermediate color space with chrominance and luminance values; removing the chrominance values from the intermediate image; comparing the intermediate image to the grayscale reference image to generate the correction values; and populating the lookup table with the correction values.