Patent ID: 8330768
Filing Date: 2012-12-11
Classification: H04N

Abstract:
1. A method of image rendering, the method comprising: if an error value exceeds a threshold value, then iteratively performing the steps of: modifying a display image luminance based on an input luminance and a set of tone-mapping parameters comprising: a brightness parameter, a sharpness parameter, and a contrast parameter, wherein the modifying is based on a linear combination of a mean luminance component, a high pass luminance component, and a low pass luminance component; transforming the modified display image luminance based on a human luminance perception model and generating a display visual response image; comparing the display visual response image with a reference visual response image to generate the error value; modifying at least one of the set of tone-mapping parameters comprising: the brightness parameter, the sharpness parameter, and the contrast parameter; wherein the parameter modification is based on the generated error value; and generating a tone-mapped output luminance based on the modified input luminance and at least one of the set of the modified tone-mapping parameters.