US 12,170,850 B2
Systems and methods for shadow detection and reduction in document capture
Tao Chen, Palo Alto, CA (US); and Reda Harb, Issaquah, WA (US)
Assigned to Adeia Guides Inc., San Jose, CA (US)
Filed by Adeia Guides Inc., San Jose, CA (US)
Filed on Sep. 30, 2022, as Appl. No. 17/957,902.
Prior Publication US 2024/0114250 A1, Apr. 4, 2024
Int. Cl. H04N 23/74 (2023.01); G06T 7/00 (2017.01); H04N 23/71 (2023.01)
CPC H04N 23/74 (2023.01) [G06T 7/0002 (2013.01); H04N 23/71 (2023.01); G06T 2207/10152 (2013.01); G06T 2207/30176 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of enhancing document capture, the method comprising:
receiving, from a capture device, a first image of a hardcopy document, the first image including a shadow over at least a portion of the hardcopy document;
detecting a shadow in the first image;
selecting an intensity level based on a characteristic of the shadow, wherein the intensity level is selected from at least two intensity levels at which a controllable light source is capable of emitting;
causing the controllable light source, directed at the hardcopy document, to emit light at the intensity level;
receiving, from the capture device, a second image of the hardcopy document while the hardcopy document is illuminated by the controllable light source emitting the light at the intensity level; and
storing the second image of the hardcopy document.