Patent ID: 8379040

Claim:
A picture processing method of a picture frame including plural pixels, the method comprising: receiving picture data including a luminance signal and chrominance signals for each pixel of a picture frame; calculating, by a processor, a saturation value based on the chrominance signals; obtaining a weight coefficient corresponding to the saturation value by referring to a weight coefficient storage; calculating, by the processor, a first value by multiplying the luminance signal by the weight coefficient for the each pixel; calculating, by the processor, a picture level value of the picture frame by using the first value; converting the luminance signal included in the picture data based on the picture level value; obtaining a peak luminance corresponding to the picture level value by referring to a gain storage; wherein the converting converts the luminance signal included in the picture data based on the obtained peak luminance; generating a conversion table based on the peak luminance so as to reduce a reproducible range of the luminance signal; wherein the converting converts the luminance signal into the converted luminance signal by referring to the conversion table; wherein the generating calculates the converted luminance signal by multiplying an input luminance by a result of dividing the peak luminance by a maximum luminance value, and generates the conversion table by relating the input luminance with the converted luminance signal.