Patent ID: 9390660
Filing Date: 2016-07-12
CPC Classification: G09G

Claim Text:
1. A method for adapting image data to a high dynamic range display, wherein the image data is specified for an input gamut with a range that is lower than the range of a display gamut of the high dynamic range display, the method comprising: applying a boost to the image data, wherein the image data is expanded to the range of the high dynamic range display, and wherein the image data comprises pixels and applying a boost to the image data comprises scaling the pixels according to their brightness by a boost factor, the boost factor being a function of the pixel values such that the boost factor increases for increasing brightness of the pixel values; dithering the boosted image data, comprising: applying a variation to values of a plurality of the pixels wherein a pixel value changes differently compared to a neighboring pixel value so as to reduce artifacts along boundaries within the image data, wherein the artifacts between neighboring pixels are introduced by applying the boost to neighboring pixel values to achieve the expanded high dynamic range of the display; and rounding the value of the one or more pixels; color correcting the image data specified for the input gamut to a display gamut by performing a transformation on the color values and performing an affine transformation on color values according to the expression 0=sMi +c; wherein O is an output color vector, i is an input color vector, s is a scaling value; M is a transformation vector and c is a color shift vector; constraining the image data to the display gamut, wherein the constrained image data does not specify an intensity for any color channel that is greater than an intensity that can be reproduced by the high dynamic range display.