US 12,277,733 B2
Calibration methods and systems for an under-calibrated camera capturing a scene
Solmaz Hajmohammadi, San Francisco, CA (US); Richard A. Paris, Nashville, TN (US); Daniel M. Michler, Lexington, KY (US); and Jie Yu, Natick, MA (US)
Assigned to Verizon Patent and Licensing Inc., Basking Ridge, NJ (US)
Filed by Verizon Patent and Licensing Inc., Basking Ridge, NJ (US)
Filed on Dec. 5, 2022, as Appl. No. 18/074,844.
Prior Publication US 2024/0185461 A1, Jun. 6, 2024
Int. Cl. G06T 7/80 (2017.01); H04N 13/246 (2018.01)
CPC G06T 7/85 (2017.01) [G06T 2207/30196 (2013.01); G06T 2207/30221 (2013.01); H04N 13/246 (2018.05)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
identifying, by a camera calibration system, a common feature present within a scene and visible in each of:
a first image of the scene captured by a first camera from a first pose represented by a first set of calibration parameters, and
a second image of the scene captured by a second camera from a second pose represented by a second set of calibration parameters;
estimating, by the camera calibration system, a 3D position of the common feature with respect to a global coordinate system associated with the scene;
determining, by the camera calibration system, that the first set of calibration parameters represents the first pose more accurately than the second set of calibration parameters represents the second pose; and
revising, by the camera calibration system and in response to the determining that the first set of calibration parameters represents the first pose more accurately than the second set of calibration parameters represents the second pose, the second set of calibration parameters based on the estimated 3D position of the common feature and the first set of calibration parameters;
wherein the second pose of the second camera is included with one or more other poses in a series of poses that the second camera moves through during an event at the scene that is being captured; and
wherein one or more additional sets of calibration parameters different from the second set of calibration parameters are determined for the one or more other poses in the series of poses during the event at the scene.