Patent ID: 8270710
Filing Date: 2012-09-18
Classification: G06T,H04N

Abstract:
1. An apparatus-implemented method for image processing, the method comprising converting a digital image between a first digital representation of the image and a second digital representation of the image, wherein the image comprises a plurality of image portions, wherein at each said image portion the image has color coordinates T 1 , T 2 , T 3 in a predefined linear color coordinate system (CCS); wherein at least for each said image portion whose color coordinates T is in a predefined range, the first digital representation comprises color coordinates s 1 , s 2 , s 3 such that: wherein c 1 , c 2 , c 3 , c 4 , c 5 , c 6 are predefined constants independent of the image portion, wherein c 1 , c 2 , c 5 , c 6 are not zero, c 2 is positive, and each of |c 1 /c 5 | and |c 1 /c 6 | is at least 0.25 and at most 0.35.