Dual-Camera Access Control for Tailgating at Passage Devices
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Solution Overview
Problem
Existing access control systems for passage devices, such as security gates and elevator doors, are vulnerable to tailgating and multi-user access, compromising their reliability.
Innovation Solution
A dual-camera facial recognition system is implemented, with separate first and second imaging devices having distinct fields of view, to identify authorized users and distinguish between human and non-human objects, enhancing the access control system's efficiency in preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single imaging device is used for facial recognition access control, then the system is simpler and cheaper, but it is vulnerable to tailgating and multi-user access attacks
Solution Approach 1:
The imaging system is segmented into two separate imaging devices with different fields of view. The first imaging device captures images for facial recognition and authorization verification, while the second imaging device captures images specifically for detecting objects behind users. This segmentation allows each device to be optimized for its specific function, improving overall system reliability without requiring a single complex device
Solution Approach 2:
The second imaging device acts as an intermediary monitoring system that specifically watches for tailgating attempts. By positioning this device to capture the area behind authorized users, it provides an additional layer of security that detects unauthorized individuals without interfering with the primary facial recognition process
2Measurement precision
If facial recognition is performed for every user detected, then authorization accuracy is improved, but processing time increases
Solution Approach 1:
The system performs preliminary detection using the second imaging device to identify whether a human object is present behind the authorized user before initiating full facial recognition processing. This preliminary action allows the system to quickly determine when full verification is necessary and when it can be simplified, reducing unnecessary processing time while maintaining accuracy when needed
Data Source
Figure 1A~2A
Figure 2B~3
Figure 4A~4B
AI summary
The invention relates to an access control system (100) for a passage device (110). The system (100) comprises: a first imaging device (120a) having a first field of view (140a) to an entrance area (150) of the passage device (110) for providing first image data, a second imaging device (120b) having a second field of view (140b) to the entrance area (150) of the passage device (110) for providing second image data, and a control unit (130) for performing facial recognition- based an access control procedure for the first image data and/or for the second image data. The first imaging device (120a) is arranged to the passage device (110) or in a vicinity of the passage device (110) and the second imaging device (120b) is arranged to the passage device (110) or in a vicinity of the passage device (110) so that the second field of view (140b) differs at least partly from the first field of view (140a). The invention relates also to a method for access control of the passage device (110).