CSP Surveillance Techniques & Equipment Operations 3 — Questions and Answers
Question 1: What does the term 'lux rating' on a surveillance camera specification indicate?
- The camera's maximum recording resolution
- The minimum light level required for the camera to produce a usable image (Correct answer)
- The maximum range of the camera's infrared illuminators
- The camera's weatherproofing certification level
Correct answer: The minimum light level required for the camera to produce a usable image
Lux rating specifies the minimum illumination level at which a camera can produce a usable image; lower lux values indicate better low-light performance.
Question 2: During a mobile surveillance operation, the 'eye' refers to:
- The surveillance team leader directing the operation
- The team member with direct visual on the subject at any given moment (Correct answer)
- The stationary observation post supporting the mobile team
- The central command monitoring CCTV feeds
Correct answer: The team member with direct visual on the subject at any given moment
The 'eye' is surveillance terminology for the operator who currently has direct visual contact with the subject and is responsible for directing other team members.
Question 3: Which video compression standard offers the best balance of image quality and bandwidth efficiency for modern IP surveillance systems?
- MJPEG
- H.264
- H.265/HEVC (Correct answer)
- MPEG-2
Correct answer: H.265/HEVC
H.265/HEVC achieves approximately 50% better compression efficiency than H.264 at equivalent quality, significantly reducing bandwidth and storage requirements for surveillance systems.
Question 4: An operator notices a camera's image has become blurry only at night while daytime images remain sharp. The most likely cause is:
- Moisture condensation inside the camera housing
- IR focal shift due to the camera lens not being IR-corrected (Correct answer)
- The recording system switching to lower resolution at night
- Vandalism to the camera housing
Correct answer: IR focal shift due to the camera lens not being IR-corrected
IR focal shift occurs when infrared light focuses at a slightly different plane than visible light, causing blur in cameras with lenses not optically corrected for IR wavelengths.
Question 5: What is the legal doctrine of 'reasonable expectation of privacy' primarily used to determine in surveillance operations?
- Whether surveillance equipment meets industry standards
- Whether conducting surveillance in a particular location requires legal authorization (Correct answer)
- The maximum distance a surveillance officer can follow a subject
- How long surveillance footage may be retained
Correct answer: Whether conducting surveillance in a particular location requires legal authorization
The reasonable expectation of privacy doctrine, established in Katz v. United States, determines where government surveillance requires legal authorization versus public observation.
Question 6: In a CCTV system, what is the purpose of a video matrix switcher?
- To compress video files for long-term storage
- To route any camera input to any monitor output in large systems (Correct answer)
- To convert analog cameras to IP-compatible signals
- To apply motion detection algorithms across all cameras
Correct answer: To route any camera input to any monitor output in large systems
A video matrix switcher allows operators to selectively route any camera signal to any display monitor, enabling flexible viewing configurations in large multi-camera installations.
Question 7: When photographing a surveillance subject for identification purposes, the ideal image should prioritize:
- Full body shots showing distinctive clothing
- A clear frontal facial image showing distinguishing features (Correct answer)
- Images that capture the subject in profile only
- Wide-angle shots showing the subject in their environment
Correct answer: A clear frontal facial image showing distinguishing features
Facial recognition and positive identification require clear frontal facial images that show distinguishing features such as eye color, facial structure, and notable marks.
CSP Surveillance Techniques & Equipment Operations 3
What does the term 'lux rating' on a surveillance camera specification indicate?