Patent ID: 8345038

Claim:
A method for adjusting image characteristics, said method comprising: a) creating an image histogram for an image, said histogram comprising a plurality of bins; b) selecting a subset of backlight illumination levels from a set of possible backlight illumination levels, said selecting being dependent on characteristics of said image; c) calculating a display reference model using a first pre-computed integer representation of a gamma power function; d) calculating a display target model using a second pre-computed integer representation of a gamma power function; e) determining a distortion weight for each histogram bin at each selected backlight illumination level in said subset using said display reference model and said display target model; f) determining backlight-specific frame distortion values by multiplying said distortion weights by their corresponding histogram bin counts for each of said selected backlight illumination levels; and g) illuminating a backlight at a selected backlight illumination level from said subset based on said backlight-specific frame distortion values.