Patent ID: 6510242
Filing Date: 2003-01-21
Classification: H04N

Abstract:
A method for generating a chrominance value for a selected pixel, comprising:selecting a group of pixels that includes the selected pixel; inputting one luminance value corresponding to the selected pixel; obtaining a group luminance value in dependence upon at least the inputted luminance value; computing a luminance value difference of the group luminance value from the inputted luminance value corresponding to the selected pixel; determining a limit saturation chrominance value in dependence upon at least the inputted luminance value; obtaining a group chrominance value for the group of pixels; computing a chrominance value difference between the limit saturation chrominance value and the group chrominance value; multiplying a numerical constant with the computed luminance value difference and with the computed chrominance value difference to derive a chrominance adjustment; and adding the chrominance adjustment to the group chrominance value to generate a chrominance value for the selected pixel.