US 12,475,770 B2
Methods and systems for detecting a tailgating event at an access point controlled by an access control system
Allen Houston, Lisburn (GB); Peter Lawrence, Lisburn (GB); and Terence Neill, Lisburn (GB)
Assigned to TYCO FIRE & SECURITY GMBH, Neuhausen am Rhenfall (CH)
Filed by Controlled Electronic Management Systems Limited, Belfast (GB)
Filed on Aug. 11, 2021, as Appl. No. 17/399,484.
Prior Publication US 2023/0050055 A1, Feb. 16, 2023
Int. Cl. G08B 13/196 (2006.01); G06F 18/22 (2023.01); G06F 18/25 (2023.01); G06V 20/52 (2022.01); G06V 40/10 (2022.01); G07C 9/28 (2020.01); H04N 7/18 (2006.01)
CPC G08B 13/196 (2013.01) [G06F 18/22 (2023.01); G06F 18/25 (2023.01); G06V 20/52 (2022.01); G06V 40/10 (2022.01); G07C 9/28 (2020.01); H04N 7/181 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, during an initial setup, by a first sensor that is mounted at a first height in a surveillance area, from a second sensor that is mounted at a second height that is lower than the first height and is configured for performing facial recognition to allow access to a restricted area, configuration information that defines a first zone and a second zone of the surveillance area, the second zone being closer to an access point to the restricted area than the first zone;
monitoring, by the first sensor, the first zone and the second zone subsequent to the initial setup, including capturing a first image by the first sensor;
determining, using the first image captured by the first sensor, that a first count of one or more objects have moved from the first zone to the second zone of the surveillance area;
obtaining a second image of the surveillance area adjacent to the access point to the restricted area using the second sensor and responsive to the first sensor determining that the first count of the one or more objects have moved from the first zone to the second zone, wherein the second sensor is configured for performing facial recognition to allow access to the restricted area to a number of objects detected in the second image of the surveillance area;
determining a second count of the number of objects, based on the facial recognition performed on the second image;
identifying a tailgating event in response to determining that the first count does not match the second count;
outputting a tailgating notification to indicate the tailgating event, wherein the tailgating notification is configured to direct the one or more objects to move away from each other; and
retrying the facial recognition for access to the restricted area, in response to outputting the tailgating notification.