CCTV CCTV Video Analytics & Image Processing 1 — Questions and Answers
Question 1: What is the primary function of video analytics in a CCTV system?
- To automatically analyze video content and generate alerts based on predefined rules (Correct answer)
- To compress video files for storage
- To calibrate camera lens focus
- To assign IP addresses to cameras
Correct answer: To automatically analyze video content and generate alerts based on predefined rules
Video analytics applies algorithms to live or recorded footage to detect specific events or behaviors (such as intrusion or loitering) and trigger real-time alerts without requiring constant human monitoring.
Question 2: What does motion detection analytics do in a CCTV system?
- Triggers recording or an alert when pixel changes in the scene exceed a set threshold (Correct answer)
- Adjusts the camera's pan and tilt automatically
- Increases video resolution when activity is detected
- Identifies the names of people in the frame
Correct answer: Triggers recording or an alert when pixel changes in the scene exceed a set threshold
Motion detection compares consecutive video frames and alerts or begins recording when the number of changed pixels surpasses a configured sensitivity threshold, indicating movement in the scene.
Question 3: What is a 'virtual tripwire' in video analytics?
- A user-defined line in the camera's field of view that triggers an alert when crossed (Correct answer)
- A physical wire that stops intruders
- A cable management solution for camera wiring
- A network boundary for camera IP addresses
Correct answer: A user-defined line in the camera's field of view that triggers an alert when crossed
A virtual tripwire is a configurable line drawn on the video feed; when the analytics engine detects an object crossing that line in the specified direction, it generates an immediate alert.
Question 4: What does License Plate Recognition (LPR) analytics enable in a CCTV deployment?
- Automatic reading and logging of vehicle license plate characters from video (Correct answer)
- Detecting pedestrians in parking areas
- Recording audio from vehicles passing by
- Measuring vehicle speed using radar
Correct answer: Automatic reading and logging of vehicle license plate characters from video
LPR (also called ALPR) uses optical character recognition on camera footage to capture, read, and log license plate numbers for access control, law enforcement, or parking management.
Question 5: What is loitering detection in video analytics?
- An alert triggered when a person or object remains in a defined zone longer than a set time (Correct answer)
- Detection of a camera being obstructed or covered
- Identification of abandoned bags or packages
- Tracking how many people enter a building
Correct answer: An alert triggered when a person or object remains in a defined zone longer than a set time
Loitering detection monitors whether a person or object stays within a designated area beyond a configured dwell-time threshold, alerting operators to potentially suspicious behavior.
Question 6: What does abandoned object detection analytics identify?
- An object that appears in the scene and remains stationary after the person who placed it leaves (Correct answer)
- A camera that has stopped recording
- A person who has fallen and cannot move
- A vehicle that is illegally parked
Correct answer: An object that appears in the scene and remains stationary after the person who placed it leaves
Abandoned object detection tracks items that are placed in the scene and left behind by a person who then exits, flagging potential security threats such as unattended bags in public spaces.
CCTV CCTV Video Analytics & Image Processing 1
What is the primary function of video analytics in a CCTV system?