CVSS Camera Technology & Optics Flashcards

A fisheye camera mounted on a ceiling is best described as providing what type of coverage?

Answer: 360° panoramic coverage of the area below

A fisheye lens produces a 360° or 180° panoramic view, making it ideal for ceiling-mounted open-area surveillance with dewarping software.

What advantage does a motorized auto-iris lens provide in an outdoor surveillance installation?

Answer: It automatically adjusts the aperture to maintain consistent exposure as lighting changes

An auto-iris lens uses a video or DC drive signal to continuously adjust the aperture, keeping the image properly exposed from day to night.

Which horizontal field of view angle is most appropriate for identifying individuals at a distance of 30 feet in a corridor?

Answer: 20–30° narrow angle

A narrow angle (longer focal length) magnifies the subject at distance, filling more of the frame with the person for identification-quality imagery.

When specifying a camera for a parking lot perimeter, which feature most reduces false triggers caused by headlight glare?

Answer: Wide dynamic range (WDR)

WDR handles scenes with extreme contrast between headlight beams and dark surroundings, preventing washout that can trigger false motion alarms.

The ONVIF Profile S standard primarily governs interoperability of which video system components?

Answer: IP cameras, encoders, and video management systems

ONVIF Profile S defines the interface specifications for IP-based video products including cameras, encoders, and VMS platforms to ensure interoperability.

A camera's signal-to-noise ratio (SNR) specification measured in dB indicates:

Answer: The ratio of useful image signal strength to background electronic noise

A higher SNR (in dB) means the image signal is much stronger than the noise floor, resulting in a cleaner, less grainy image.