US 11,704,781 B2
Enhanced high-dynamic-range imaging and tone mapping
Yining Deng, Fremont, CA (US); Eric Dujardin, San Jose, CA (US); Hamidreza Mirzaei Domabi, Santa Clara, CA (US); and Sung Hyun Hwang, San Jose, CA (US)
Assigned to NVIDIA Corporation, Santa Clara, CA (US)
Filed by NVIDIA Corporation, Santa Clara, CA (US)
Filed on Oct. 13, 2021, as Appl. No. 17/500,289.
Application 17/500,289 is a continuation of application No. 16/526,902, filed on Jul. 30, 2019, granted, now 11,182,884.
Prior Publication US 2022/0036524 A1, Feb. 3, 2022
Int. Cl. G06T 5/00 (2006.01)
CPC G06T 5/009 (2013.01) [G06T 2207/10024 (2013.01); G06T 2207/20208 (2013.01); G06T 2207/30252 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method comprising:
determining tone control points based at least on first pixel values defined by first image data;
computing a rate of change for a tone mapping function based at least on a first tone control point of the tone control points;
fitting a curve of the tone mapping function to a second tone control point of the tone control points based at least on constraining the tone mapping function to the rate of change at the second tone control point; and
generating second image data defining second pixel values using the tone mapping function.