	US 12,217,724 B2
	Perceptual luminance nonlinearity-based image data exchange across different display capabilities
Jon Scott Miller, Harleysville, PA (US); Scott Daly, Kalama, WA (US); Mahdi Nezamabadi, Moorestown, NJ (US); and Robin Atkins, Vancouver (CA)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Dec. 18, 2023, as Appl. No. 18/542,921.
Application 18/542,921 is a continuation of application No. 18/076,993, filed on Dec. 7, 2022, granted, now 11,887,560.
Application 18/076,993 is a continuation of application No. 17/892,473, filed on Aug. 22, 2022, granted, now 11,600,244, issued on Mar. 7, 2023.
Application 17/892,473 is a continuation of application No. 17/208,886, filed on Mar. 22, 2021, granted, now 11,587,529, issued on Feb. 21, 2023.
Application 17/208,886 is a continuation of application No. 16/812,810, filed on Mar. 9, 2020, granted, now 10,957,283, issued on Mar. 23, 2021.
Application 16/812,810 is a continuation of application No. 16/354,106, filed on Mar. 14, 2019, granted, now 10,621,952, issued on Apr. 14, 2020.
Application 16/354,106 is a continuation of application No. 15/960,303, filed on Apr. 23, 2018, granted, now 10,242,650, issued on Mar. 26, 2019.
Application 15/960,303 is a continuation of application No. 15/610,499, filed on May 31, 2017, granted, now 9,959,837, issued on May 1, 2018.
Application 15/610,499 is a continuation of application No. 15/283,237, filed on Sep. 30, 2016, granted, now 9,697,799, issued on Jul. 4, 2017.
Application 15/283,237 is a continuation of application No. 14/925,596, filed on Oct. 28, 2015, granted, now 9,521,419, issued on Dec. 13, 2016.
Application 14/925,596 is a continuation of application No. 14/735,875, filed on Jun. 10, 2015, granted, now 9,288,499, issued on Mar. 15, 2016.
Application 14/735,875 is a continuation of application No. 14/363,129, granted, now 9,077,994, issued on Jul. 7, 2015, previously published as PCT/US2012/068212, filed on Dec. 6, 2012.
Claims priority of provisional application 61/703,449, filed on Sep. 20, 2012.
Claims priority of provisional application 61/674,503, filed on Jul. 23, 2012.
Claims priority of provisional application 61/567,579, filed on Dec. 6, 2011.
Prior Publication US 2024/0144895 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06K 9/00 (2022.01); G06F 3/14 (2006.01); G09G 5/00 (2006.01); G09G 5/06 (2006.01); G09G 5/10 (2006.01); H04N 19/40 (2014.01)

CPC G09G 5/10 (2013.01) [G06F 3/14 (2013.01); G09G 5/005 (2013.01); G09G 5/06 (2013.01); H04N 19/40 (2014.11); G09G 2320/0276 (2013.01); G09G 2320/0285 (2013.01); G09G 2320/04 (2013.01); G09G 2340/0428 (2013.01); G09G 2340/0435 (2013.01); G09G 2340/06 (2013.01); G09G 2340/14 (2013.01); G09G 2370/04 (2013.01); G09G 2370/08 (2013.01); G09G 2380/08 (2013.01)]

4 Claims

1. An apparatus for encoding image data, the apparatus comprising:

an input to receiving image data with luminance values representing absolute luminance values L to be encoded; and

a processor, wherein the processor:

encodes the image data into reference encoded image data; and

outputs the reference encoded image data,

wherein the encoding comprises mapping absolute luminance values into digital code values, the luminance values of the received image data being represented by the digital code values in the reference encoded image data;

wherein the mapping is based at least in part on an inverse of a functional model of:

wherein:

Y is a normalized value of a corresponding one of the absolute luminance values L, wherein 0≤Y≤1,

V is a normalized value of a corresponding one of the digital code values D that are output as reference encoded image data, wherein 0≤V≤1, and

n, m, c₁, c₂, and c₃are predetermined values, with: