US 11,961,257 B2
Built-in calibration of time-of-flight depth imaging systems
Charles Mathy, Arlington, MA (US); Brian C. Donnelly, Sudbury, MA (US); Nicolas Le Dortz, Jamaica Plain, MA (US); and Sefa Demirtas, Winchester, MA (US)
Assigned to Analog Devices, Inc., Wilmington, MA (US)
Filed by Analog Devices, Inc., Wilmington, MA (US)
Filed on Aug. 22, 2022, as Appl. No. 17/892,405.
Application 17/892,405 is a continuation of application No. 16/664,453, filed on Oct. 25, 2019, granted, now 11,423,572.
Claims priority of provisional application 62/778,876, filed on Dec. 12, 2018.
Prior Publication US 2023/0055829 A1, Feb. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/80 (2017.01); G01S 7/497 (2006.01); G01S 17/89 (2020.01)
CPC G06T 7/80 (2017.01) [G01S 7/497 (2013.01); G01S 17/89 (2013.01); G06T 2207/10028 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An image processing system having on-the-fly calibration, comprising:
a light source configured to emit light;
a sensor array comprising a plurality of pixels for receiving incoming signals including reflected emitted light, wherein for each of the plurality of pixels, the sensor array includes at least one storage unit for storing collected received incoming signals; and
a processor configured to determine an obstruction distance between the light source and an exterior obstruction, to determine a distance measurement for at least one of pixel in a subset of pixels of the plurality of pixels, and to use the obstruction distance to calibrate the image processing system,
wherein a first subset of the at least one storage unit corresponds to the subset of pixels, and wherein the first subset of the at least one storage unit stores collected signals comprising emitted light reflected off the exterior obstruction.