US 12,489,984 B2
Local tone mapping
Guillaume Matthieu Guerin, Renens (CH); Antoine Regimbeau, Aigremont (FR); Thomas Nicolas Emmanuel Veit, Meudon (FR); Bruno Cesar Douady-Pleven, Orsay (FR); and Violaine Marie Mong-lan Sudret, Paris (FR)
Assigned to GoPro, Inc., San Mateo, CA (US)
Filed by GoPro, Inc., San Mateo, CA (US)
Filed on Oct. 18, 2023, as Appl. No. 18/381,362.
Application 18/381,362 is a continuation of application No. 17/526,740, filed on Nov. 15, 2021, granted, now 11,800,238.
Application 17/526,740 is a continuation of application No. 16/780,132, filed on Feb. 3, 2020, granted, now 11,178,341, issued on Nov. 16, 2021.
Application 16/780,132 is a continuation of application No. 16/368,974, filed on Mar. 29, 2019, granted, now 10,554,903, issued on Feb. 4, 2020.
Application 16/368,974 is a continuation of application No. 15/690,772, filed on Aug. 30, 2017, granted, now 10,284,785, issued on May 7, 2019.
Prior Publication US 2024/0048854 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 23/741 (2023.01); G06T 5/94 (2024.01); H04N 23/80 (2023.01); H04N 23/951 (2023.01); G06T 5/50 (2006.01); G06T 5/92 (2024.01)
CPC H04N 23/741 (2023.01) [G06T 5/94 (2024.01); H04N 23/80 (2023.01); H04N 23/951 (2023.01); G06T 5/50 (2013.01); G06T 5/92 (2024.01); G06T 2207/20028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an image sensor; and
a processing apparatus configured to:
determine a perceptual domain image based on an image captured by the image sensor and a gamma curve that models human perception of contrast;
determine a low-frequency component perceptual domain image and a high-frequency component perceptual domain image as components of the perceptual domain image, in which the determination of the low-frequency component perceptual domain image comprises the processing apparatus being configured to determine a reduced resolution image based on the image that is at a lower resolution than the image and apply a bilateral filter to the image to obtain a low-frequency component image, in which applying the bilateral filter comprises processing pixels of the reduced resolution image as candidates; and
determine an enhanced image based on a weighted sum of the low-frequency component perceptual domain image and the high-frequency component perceptual domain image, where the high-frequency component perceptual domain image is weighted more than the low-frequency component perceptual domain image.