US 12,277,821 B2
Access control system and method to distinguish between tailgate and piggyback
Sven Rebien, Victoria (CA); Pietro Russo, Melrose, MA (US); and Peter L. Venetianer, McLean, VA (US)
Assigned to MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed by MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed on Dec. 21, 2021, as Appl. No. 17/645,410.
Prior Publication US 2023/0196860 A1, Jun. 22, 2023
Int. Cl. G07C 9/25 (2020.01); G06V 20/52 (2022.01); G06V 40/20 (2022.01); G07C 9/21 (2020.01)
CPC G07C 9/253 (2020.01) [G06V 20/52 (2022.01); G06V 40/20 (2022.01); G07C 9/21 (2020.01)] 13 Claims
OG exemplary drawing
 
1. An access control system comprising:
a camera configured to be positioned at an access point; a feedback mechanism; and
an electronic processor coupled to the camera and the feedback mechanism, the electronic processor configured to
receive, from the camera, one or more images of a first person at the access point;
determine based on credential information whether the first person is authorized to enter through the access point;
in response to determining that the first person is authorized to enter through the access point, determine, based on an unprompted consent-to-follow gesture of the first person detected in the one or more images, a number of guests of the first person requested to enter through the access point;
determine, based on the one or more images, a number of persons entering through the access point;
provide, using the feedback mechanism, a feedback indicating the number of guests determined based on the consent-to-follow gesture; and
generate an alert indicating unauthorized entry when the number of persons is greater than the number of guests.