US 12,444,208 B2
Infrared light source protective system
Timothy James Henry Edwards, Kallista (AU)
Assigned to SEEING MACHINES LIMITED, Fyshwick (AU)
Filed by SEEING MACHINES LIMITED, Fyshwick (AU)
Filed on Feb. 8, 2024, as Appl. No. 18/436,216.
Application 18/436,216 is a continuation of application No. 17/048,894, granted, now 11,941,894, previously published as PCT/AU2019/050347, filed on Apr. 18, 2019.
Claims priority of application No. 2018901300 (AU), filed on Apr. 19, 2018.
Prior Publication US 2024/0177500 A1, May 30, 2024
Int. Cl. G06V 20/59 (2022.01); G06F 18/22 (2023.01); G06V 10/141 (2022.01); G06V 10/143 (2022.01); G06V 10/147 (2022.01); G06V 10/60 (2022.01)
CPC G06V 20/59 (2022.01) [G06F 18/22 (2023.01); G06V 10/141 (2022.01); G06V 10/143 (2022.01); G06V 10/147 (2022.01); G06V 10/60 (2022.01); G06V 20/597 (2022.01)] 18 Claims
OG exemplary drawing
 
1. In a driver or occupant monitoring system, the system including at least one electromagnetic emission source and an imaging camera, a method of detection of occlusion of the electromagnetic emission source, comprising the steps of:
(a) modulating the electromagnetic emission source intensity in a predetermined manner according to an encoded modulation pattern;
(b) detecting if the modulation pattern is present in at least a region of an image captured by the imaging camera by applying a matched filter that matches the encoded modulation pattern to the captured imagery;
(c) on the basis of the degree of encoded modulation pattern present as detected by the matched filter, determining if the emission source is occluded;
(d) upon detection of the emission source being occluded, transitioning the electromagnetic emission source to a lower power state.