PSP Video Surveillance and CCTV

Question 1

What camera resolution is generally recommended for reliable facial identification in a video surveillance system according to ASIS and IPVM guidelines?

Accepted Answer

100 pixels per foot (PPF) or higher

Answer

Facial identification (recognizing a specific individual from a database) typically requires 100 PPF or higher, while facial detection requires approximately 40 PPF.

Question 2

Which IP camera compression standard provides the BEST image quality at the lowest bandwidth compared to older MPEG-4 and H.264 formats?

Accepted Answer

H.265 (HEVC)

Answer

H.265 (HEVC) offers approximately 50% better compression efficiency than H.264, delivering the same image quality at half the bit rate or better quality at the same bit rate.

Question 3

What is the primary advantage of Wide Dynamic Range (WDR) cameras in physical security applications?

Accepted Answer

They capture usable images in scenes with extreme contrast between bright and dark areas

Answer

WDR cameras use multiple exposures or sensor technology to capture detail in both very bright (e.g., exterior windows) and very dark areas simultaneously within the same frame.

Question 4

For a CCTV system used as evidence in US criminal prosecution, which chain of custody practice is MOST critical?

Accepted Answer

Documenting all access to and handling of recorded media from capture to court

Answer

Maintaining a documented chain of custody for video evidence — recording who accessed it, when, and for what purpose — is essential for its admissibility in US court proceedings.

Question 5

What is the minimum recommended video retention period for a general commercial facility's CCTV system under most US security best-practice guidelines?

Accepted Answer

30 days

Answer

ASIS and most US security guidelines recommend a minimum 30-day retention period for general commercial facilities, though specific industries (healthcare, financial) may have longer requirements.

PSP - Physical Security Professional Practice Test

PSP - Physical Security Professional Practice Test

PSP Video Surveillance and CCTV