CCTV CCTV Video Analytics and Advanced Features 1 — Questions and Answers
Question 1: What is 'video analytics' in the context of CCTV systems?
- Manual review of recorded footage by security personnel
- Automated software-based analysis of video content to detect events or patterns (Correct answer)
- Compression algorithms used to reduce video file sizes
- The process of tagging recorded footage with timestamps
Correct answer: Automated software-based analysis of video content to detect events or patterns
Video analytics uses algorithms and AI to automatically analyze live or recorded video streams to detect specified events, behaviors, or objects without human intervention.
Question 2: Which video analytics feature can alert operators when a person enters a prohibited area?
- Line crossing detection
- Perimeter intrusion / virtual zone detection (Correct answer)
- Loitering detection
- Camera tamper detection
Correct answer: Perimeter intrusion / virtual zone detection
Virtual zone or perimeter intrusion detection triggers an alert when an object or person enters a defined restricted area drawn as a virtual boundary in the video.
Question 3: What does 'line crossing detection' in video analytics trigger on?
- Objects crossing a virtual line drawn in the camera's field of view in a specified direction (Correct answer)
- The camera's cable being physically cut or disconnected
- Movement detected anywhere within the full camera frame
- A person standing still for longer than a defined time period
Correct answer: Objects crossing a virtual line drawn in the camera's field of view in a specified direction
Line crossing detection triggers an alarm when an object crosses a user-defined virtual line in a specific direction within the camera's field of view.
Question 4: What is 'loitering detection' in a CCTV analytics system?
- Detection of objects moving faster than a defined speed threshold
- An alert triggered when a person or object remains within a defined zone for longer than a set time (Correct answer)
- Detection of unattended bags or objects left in a scene
- Facial recognition matching against a watchlist
Correct answer: An alert triggered when a person or object remains within a defined zone for longer than a set time
Loitering detection monitors the duration an object remains in a defined area, triggering an alert if it exceeds a preset time threshold.
Question 5: What is 'camera tamper detection' designed to alert on?
- Unauthorized access to the DVR/NVR login page
- Physical interference such as camera blocking, defocusing, or spray painting (Correct answer)
- Loss of the network connection to an IP camera
- Motion detected within 1 meter of the camera housing
Correct answer: Physical interference such as camera blocking, defocusing, or spray painting
Camera tamper detection algorithms identify when a camera has been blocked, redirected, defocused, or spray-painted to disable its view, triggering an immediate alert.
Question 6: What is the primary function of 'license plate recognition (LPR)' in a CCTV system?
- Tracking pedestrian traffic flow in parking lots
- Automatically reading and logging vehicle license plate numbers from video (Correct answer)
- Measuring vehicle speed to detect speeding
- Detecting abandoned vehicles via long-duration zone detection
Correct answer: Automatically reading and logging vehicle license plate numbers from video
LPR (also called ANPR - Automatic Number Plate Recognition) uses OCR algorithms to read vehicle license plates from video frames and log or compare them against a database.
CCTV CCTV Video Analytics and Advanced Features 1
What is 'video analytics' in the context of CCTV systems?