Patent ID: 6252585
Filing Date: 2001-06-26
Classification: G09G,H04N

Abstract:
An image display system comprising a cascade of an image source, an index determination element, a lookup table unit and an output unit, successively, the image source producing source color values, the index determination element selecting index values as a function of the source color values, the index values pointing to LUT color values stored in the lookup table unit, the output unit deriving output color values from LUT color values read from the lookup table unit under selection from the index values, each output color value corresponding to a pixel, a first component of the output color values being output in common for at least two pixels and a second component being output separately for each of these at least two pixels, whereby there is a space of possible combinations of index values for these at least two pixels, said combinations all resulting in substantially the same first component of the output color value, the index values in at least one combination from this space pointing to substantially different LUT color values, wherein the index determination element uses selection from this space to minimize an error in the second component of the output color values for the at least two pixels.