US 12,482,438 B2
Pixel modification to reduce energy consumption of a display device
Erik Reinhard, Hede-Bazouges (FR); Christel Chamaret, Chantepie (FR); Edouard Francois, Bourg des Comptes (FR); Zoubida Ameur, Cesson-Sevigne (FR); Milos Radosavljevic, Rennes (FR); Laurent Blonde, Thorigne-Fouillard (FR); and Claire-Helene Demarty, Montreuil le Gast (FR)
Assigned to INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
Appl. No. 18/290,126
Filed by INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
PCT Filed May 3, 2022, PCT No. PCT/EP2022/061872
§ 371(c)(1), (2) Date Nov. 9, 2023,
PCT Pub. No. WO2022/238183, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 21305604 (EP), filed on May 11, 2021; and application No. 22305032 (EP), filed on Jan. 14, 2022.
Prior Publication US 2024/0290297 A1, Aug. 29, 2024
Int. Cl. G09G 5/10 (2006.01); G09G 3/3208 (2016.01)
CPC G09G 5/10 (2013.01) [G09G 3/3208 (2013.01); G09G 2320/0626 (2013.01); G09G 2330/021 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method comprising:
determining, for a pixel of an image located at a position within an input image, a scaling value based on human visual sensitivity at the position of the pixel; and
scaling a luminance of the pixel by an amount based on the scaling value,
wherein the human visual sensitivity is determined by a pixel map of contrast sensitivities Simg as follows:

OG Complex Work Unit Math
wherein CWT is a continuous wavelet transform, L is a pixel map of luminance values of the input image, G is a smoothing kernel, ui are the frequencies defined by levels i of the CWT, and k is a constant representing a second scaling value, and Sis a contrast sensitivity function.