US 12,272,040 B2
Tone management using tone gain functions for high dynamic range imaging applications
Sung Hyun Hwang, San Jose, CA (US); Eric Dujardin, San Jose, CA (US); and Yining Deng, Fremont, CA (US)
Assigned to NVIDIA Corporation, Santa Clara, CA (US)
Filed by NVIDIA Corporation, Santa Clara, CA (US)
Filed on Sep. 15, 2023, as Appl. No. 18/368,732.
Application 18/368,732 is a division of application No. 17/192,698, filed on Mar. 4, 2021, granted, now 11,810,274.
Prior Publication US 2024/0005462 A1, Jan. 4, 2024
Int. Cl. G06T 5/00 (2024.01); G06T 5/92 (2024.01); H04N 5/57 (2006.01); H04N 23/741 (2023.01)
CPC G06T 5/92 (2024.01) [G06T 5/00 (2013.01); H04N 5/57 (2013.01); H04N 23/741 (2023.01); G06T 2207/10024 (2013.01); G06T 2207/20208 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
determining a plurality of tonal regions of a first image;
generating a second image by at least blurring the first image with a smoothing factor;
combining a plurality of gain functions that correspond to the plurality of tonal regions to obtain a combination of the plurality of gain functions;
generating a mapping by at least applying the combination of the plurality of gain functions to the smoothing factor; and
generating a third image based, at least in part, on applying the mapping to the second image.