US 12,105,197 B2
Real-time denoise and saturation removal of 3D LiDAR data
Yunpeng Song, San Ramon, CA (US)
Assigned to Liturex (Guangzhou) Co. Ltd., Guangzhou (CN)
Filed by Liturex (Guangzhou) Co. Ltd, Guangzhou (CN)
Filed on Jan. 7, 2021, as Appl. No. 17/144,119.
Claims priority of provisional application 62/958,235, filed on Jan. 7, 2020.
Prior Publication US 2021/0208277 A1, Jul. 8, 2021
Int. Cl. G01S 17/32 (2020.01); G01S 7/484 (2006.01); G01S 17/04 (2020.01); G01S 17/89 (2020.01)
CPC G01S 17/32 (2013.01) [G01S 7/484 (2013.01); G01S 17/04 (2020.01); G01S 17/89 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of increasing a dynamic range of a light detection and ranging (LiDAR) device, comprising:
acquiring a first image frame captured at a high illumination, the first image frame including an image of a high-reflectivity object and a low-reflectivity object, the image of the high-reflectivity object being saturated;
acquiring a second image frame captured at a reduced illumination, the second image frame including an image of the high-reflectivity object, with the low-reflectivity object being invisible;
identifying a saturation region on the first image frame;
performing a cross-correlation operation between the identified saturation region and a corresponding region on the second image frame to identify a region in the saturation region;
replacing the identified region in the saturation region with a corresponding region in the second image frame;
performing one or more cross-correlation operations to update the remainder of the saturation region with a corresponding region of the second image frame; and
after each cross-correlation, performing a gradient step with respect to intensity data and range data related to the remainder of the saturation region to denoise the updated remainder of the saturation region.