US 12,014,523 B2
Intrinsic parameters estimation in visual tracking systems
Clemens Birklbauer, Vienna (AT); Georg Halmetschlager-Funek, Vienna (AT); Matthias Kalkgruber, Vienna (AT); and Kai Zhou, Wiener Neudorf (AT)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on May 17, 2023, as Appl. No. 18/198,414.
Application 18/198,414 is a continuation of application No. 17/448,655, filed on Sep. 23, 2021, granted, now 11,688,101.
Claims priority of provisional application 63/189,935, filed on May 18, 2021.
Prior Publication US 2023/0360267 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/80 (2017.01); G06V 10/44 (2022.01); H04N 17/00 (2006.01); H04N 23/61 (2023.01); H04N 23/65 (2023.01); H04N 23/68 (2023.01)
CPC G06T 7/80 (2017.01) [G06V 10/443 (2022.01); H04N 17/002 (2013.01); H04N 23/61 (2023.01); H04N 23/651 (2023.01); H04N 23/6812 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
operating a second camera of a visual tracking system with a first camera of the visual tracking system disabled;
detecting that a temperature of the first camera is within a threshold of a factory calibration temperature of the first camera after operating the second camera;
in response to detecting that the temperature of the first camera is within the threshold of the factory calibration temperature of the first camera, operating the first camera;
detecting a first set of features in a first image generated by the first camera after operating the first camera; and
correcting intrinsic parameters of the second camera based on the first set of features in the first image.