US 12,114,078 B2
Low-light autofocus technique
Ying Chen Lou, Mountain View, CA (US); Leung Chun Chan, Mountain View, CA (US); Kiran Murthy, Mountain View, CA (US); Qiurui He, Mountain View, CA (US); Szepo Robert Hung, Mountain View, CA (US); and Sushil Nath, Mountain View, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/754,179
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Oct. 11, 2019, PCT No. PCT/US2019/055847
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/071508, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2022/0294964 A1, Sep. 15, 2022
Int. Cl. H04N 23/73 (2023.01); H04N 23/71 (2023.01)
CPC H04N 23/73 (2023.01) [H04N 23/71 (2023.01)] 29 Claims
OG exemplary drawing
 
1. A method comprising:
receiving an indication of a low-light condition for a camera system;
determining an extended exposure time for a low-light autofocus procedure of the camera system based on a motion-blur tolerance and the low-light condition;
capturing, by the camera system, an extended frame for the low-light autofocus procedure, wherein the extended frame is captured by the camera system using the determined extended exposure time; and
determining, based on the captured extended frame, an in-focus lens setting for a lens of the camera system.