Video Analytics & AI Surveillance Flashcards
7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Video Analytics & AI Surveillance flashcards as text
What is 'audio analytics' in a surveillance system designed to detect?
Answer: Sound events such as gunshots, glass breaking, or aggressive speech
Audio analytics processes sound in real time to detect specific events like gunshots, breaking glass, or screaming, triggering alerts even when visual analytics may not detect a threat.
Which metric is commonly used to measure the accuracy of a video analytics system?
Answer: Detection rate and false positive rate
Detection rate (true positives caught) combined with false positive rate (incorrect alerts) are the standard metrics for evaluating video analytics accuracy and performance.
What is the purpose of 'camera tamper detection' in a video analytics system?
Answer: Alerting when a camera is obstructed, moved, or spray-painted
Camera tamper detection identifies when a camera has been physically interfered with—such as being covered, repositioned, or defaced—and triggers an immediate alert.
When integrating video analytics with an access control system, what type of event can trigger an automatic door lock?
Answer: Unauthorized person detected in a restricted zone
Integrated systems can use video analytics to detect unauthorized presence in a restricted zone and automatically signal the access control system to lock doors or trigger alarms.
What is a key privacy consideration when deploying facial recognition in a public surveillance system in the US?
Answer: Complying with applicable local, state, and federal regulations governing biometric data collection
Facial recognition involves collecting biometric data, and technicians must ensure the deployment complies with applicable laws, including state biometric privacy acts and Fourth Amendment protections.
What does 'scene change detection' alert a surveillance operator to?
Answer: Significant alterations in a camera's field of view, such as repositioning or masking
Scene change detection identifies when a camera's view has been significantly altered—such as being pointed away or covered—which may indicate tampering or a system compromise.
Which factor most directly affects the performance of AI-based video analytics in low-light conditions?
Answer: Camera image quality and sensitivity in low-light environments
AI video analytics relies on clear, high-quality images; cameras with poor low-light performance produce noisy images that significantly degrade object detection and classification accuracy.