Patent ID: 8928936
Filing Date: 2015-01-06
Classification: H04N,Y10S

Abstract:
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, wherein comparing the intermediate image to the grayscale reference image to generate the correction values comprises subtracting the intermediate image from the grayscale reference image to determine differences between pixels of the images.