US 11,950,001 B2
Automated calibration of head-mounted hands-free camera
Benoit Quirynen, Amsterdam-Duivendrecht (NL); Jan Dheedene, Amsterdam-Duivendrecht (NL); Bruno Dheedene, Amsterdam-Duivendrecht (NL); Dario Vuljanic, Amsterdam-Duivendrecht (NL); and Dalibor Kofjac, Amsterdam-Duivendrecht (NL)
Assigned to Rods & ConesHolding bv, Amsterdam-Duivendrecht (NL)
Filed by Rods & Cones Holding bv, Amsterdam-Duivendrecht (NL)
Filed on Jul. 27, 2022, as Appl. No. 17/875,393.
Claims priority of application No. 2021/5674 (BE), filed on Aug. 25, 2021; and application No. 22185303 (EP), filed on Jul. 15, 2022.
Prior Publication US 2023/0067410 A1, Mar. 2, 2023
Int. Cl. H04N 23/959 (2023.01); G02B 27/01 (2006.01); H04N 5/77 (2006.01); H04N 13/332 (2018.01); H04N 17/00 (2006.01); H04N 23/67 (2023.01); H04N 23/68 (2023.01)
CPC H04N 23/959 (2023.01) [H04N 5/77 (2013.01); H04N 13/332 (2018.05)] 18 Claims
OG exemplary drawing
 
1. A head-mounted device comprising:
at least one sensor system for detecting translation and rotation of the head-mounted device; and
an image sensor for recording images;
the head-mounted device being configured to automatically calibrate parameters under which the image sensor operates when a detected translation remains below a predetermined translational threshold and a detected rotation remains below a predetermined rotational threshold for at least a predetermined period of time;
wherein the predetermined length of time is at least 1.0 s, wherein the predetermined translational threshold is at most 5.0 cm, wherein the predetermined rotational threshold is at most 10.0°, and wherein the automatic calibration is performed based on the scene recorded by the image sensor;
wherein the head-mounted device is configured not to perform the subsequent calibration until translation and/or rotation of the head-mounted device is detected by the sensor system that exceeds at least a predetermined movement threshold, the predetermined movement threshold being at least two times higher than the predetermined translational threshold and rotational threshold.