Patent ID: 7333671
Filing Date: 2008-02-19
Classification: G06T

Abstract:
1. A method for processing an image to increase sharpness of the image without changing hue characteristics, the method comprising: (a) performing a transformation process to transform an original image signal into CIE XYZ colorimetric channels; (b) forming a luminance channel Y; (c) applying a filter on the luminance channel Y to obtain a processed luminance channel Y′; (d) computing processed colorimetric channels X′ and Z′ based on the processed luminance channel Y′, wherein a relationship between the processed colorimetric channel X′ and the colorimetric channel X satisfies the equation X′=(X/Y)*Y′; and (e) performing an inverse transformation process to transform the processed colorimetric channels X′Y′Z′ into a processed image signal.