Patent ID: 7259798
Filing Date: 2007-08-21
Classification: H04N

Abstract:
1. An image compensation apparatus comprising: a 3-dimensional look-up table storing 3-dimensional transformation data corresponding to upper n-bits of an input image; and a color interpolation unit outputting a final color-transformed image by performing linear interpolation using the 3-dimensional transformation data outputted from the 3-dimensional look-up table and 3-dimensional data corresponding to lower m-bits of the input image, wherein the color interpolation unit outputs a color transformation value of one point inside a cube by performing the linear interpolation using 3-dimensional color transformation values respectively corresponding to eight vertexes of a cube provided from the 3-dimensional look-up table and a value corresponding to the lower m-bits of the input image, wherein the 3-dimensional color transformation values are selected from a set of all possible 3-dimensional color transformation values for defining the input image comprising the upper and lower bits, and wherein the 3-dimensional look-up table stores a reduced number of the 3-dimensional color transformation values for defining the input image comprising the upper and lower bits.