US 11,657,529 B2
Multiple camera system with flash for depth map generation
Chao Wang, Shanghai (CN); and Donghui Wu, San Mateo, CA (US)
Assigned to Black Sesame Technologies Inc., San Jose, CA (US)
Filed by Black Sesame International Holding Limited, Santa Clara, CA (US)
Filed on Oct. 12, 2020, as Appl. No. 17/68,180.
Prior Publication US 2022/0114745 A1, Apr. 14, 2022
Int. Cl. G06T 7/593 (2017.01); H04N 13/271 (2018.01)
CPC G06T 7/593 (2017.01) [H04N 13/271 (2018.05); G06T 2207/10012 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of depth map generation, comprising:
simultaneously capturing a main-off camera image and an auxiliary-off camera image with an unpowered flash;
sparse depth mapping an object based on the main-off camera image and the auxiliary-off camera image;
capturing a main-on camera image with a powered flash;
foreground probability napping the object based on the main-oil camera image and the main-on camera image; and
dense depth mapping the object based on the sparse depth map and the foreground probability map.