Patent ID: 8761249
Filing Date: 2014-06-24
Classification: G06T,H04N

Abstract:
1. A method for encoding a first video image consisting of RGB pixel values having M bit each and a second video image consisting of RGB pixel values having N bit each, with M<N, wherein the first and second video image have the same spatial resolution, and wherein the first video image represents a color base layer and the second video image represents a color enhancement layer of the color base layer, comprising: generating a first transfer function having 2 generating a second transfer function based on the first transfer function, wherein the second transfer function has 2 applying the second transfer function to the first video image, wherein the second transfer function is used for mapping the pixels, and wherein a transformed first video image is generated; calculating the difference between the transformed first video image and the second video image; encoding the difference; encoding the first video image; and transmitting the encoded first video image, the second transfer function and the encoded difference, wherein the generating a first transfer function comprises: generating a first color histogram of a reconstructed first image, the first color histogram having 2 generating a second color histogram of the second image, the second color histogram having 2 generating from the first color histogram a smoothed color histogram having 2