US 12,277,794 B1
System to determine user presence
Baomin Wang, Herndon, VA (US); Umer Shahid, Sammamish, WA (US); Tianyi Wang, Kenmore, WA (US); Georgios Skolianos, Seattle, WA (US); Rui Zhao, Bellevue, WA (US); Manoj Aggarwal, Seattle, WA (US); and Gerard Guy Medioni, Los Angeles, CA (US)
Assigned to AMAZON TECHNOLOGIES, INC., Seattle, WA (US)
Filed by AMAZON TECHNOLOGIES, INC., Seattle, WA (US)
Filed on Jun. 3, 2021, as Appl. No. 17/303,623.
Int. Cl. G06V 10/141 (2022.01); G06V 10/143 (2022.01); G06V 10/56 (2022.01); G06V 40/10 (2022.01)
CPC G06V 40/107 (2022.01) [G06V 10/141 (2022.01); G06V 10/143 (2022.01); G06V 10/56 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
determining a first illumination sequence comprising a first plurality of timeslots, each timeslot being associated with a single color of light;
operating one or more light sources of a device to illuminate a first field of view (FOV) during a first duration using the first illumination sequence;
determining a first distance between an object and the device;
determining a first value based on the first distance;
operating a detector of the device during the first duration to acquire first intensity data that is indicative of an intensity of light incident on the detector during individual ones of the first plurality of timeslots, wherein the first intensity data is based on a product of the first value and an uncorrected intensity value; and
determining, based on the first illumination sequence and the first intensity data, a second value.