US 12,243,201 B2
Joint auto-exposure tone-mapping system
Raz Zvi Nossek, Tel-Aviv (IN); Stas Dubinchik, Givatayim (KR); Roee Sfaradi, Nes-Ziona (IN); Yarden Sharabi, Kinneret Hamoshava (IN); and Avi Zanko, Rishon LeZion (IN)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Sep. 28, 2021, as Appl. No. 17/449,171.
Prior Publication US 2023/0114798 A1, Apr. 13, 2023
Int. Cl. G06T 5/92 (2024.01); G06T 3/40 (2006.01); G06T 5/70 (2024.01); G06T 5/73 (2024.01)
CPC G06T 5/92 (2024.01) [G06T 3/40 (2013.01); G06T 5/70 (2024.01); G06T 5/73 (2024.01); G06T 2207/20076 (2013.01); G06T 2207/20208 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
computing a virtual auto-exposure gain based on image statistics;
computing a luminosity probability density function based on the image statistics;
generating a tone-mapping function by computing a scaled luminosity cumulative distribution function based on the virtual auto-exposure gain and the luminosity probability density function; and
converting a high dynamic range (HDR) image to a low dynamic range (LDR) image based on the tone-mapping function.