APPARATUS AND METHOD FOR EXTENDING LINEAR COLOR GAMUT OF COLOR DEVICE

摘要

PURPOSE: An apparatus and a method for extending linear color gamut of a color device are provided to linearly extend color gamut when relatively narrow color gamut is converted into a relatively wide color gamut, to improve picture quality. CONSTITUTION: An apparatus for extending linear color gamut of a color device includes an input color coordinate converter(210), a color gamut extension unit(220), a color gamut storage unit(230), and an output color coordinate converter(240). The input color coordinate converter receives red, green and blue color coordinates from a color device(100) with narrow color gamut to convert the color coordinates into color coordinates of luminance, chrominance and hue. The color gamut extension unit extends color attributes of luminance, chrominance and hue according to linear extension equation to convert the color attributes. The color gamut storage unit controls the color attribute information extended by the color gamut extension unit not to come out of a relatively wide color gamut device(300). The output color coordinate converter inverse-transforms the color attribute information into red, green and blue color coordinates to transmit the color coordinates to the wide color gamut device.