CCTV Video Surveillance System Design Questions and Answers

Question 1

A system designer needs to select a camera to provide evidential-quality video to identify a person's face at a distance of 10 meters.
According to the DORI standard (IEC EN 62676-4), what is the minimum required pixel density for the 'Identification' level?

Accepted Answer

250 Pixels per Meter (PPM)

Answer

62 Pixels per Meter (PPM)

Answer

125 Pixels per Meter (PPM)

Answer

25 Pixels per Meter (PPM)

Question 2

A client wants to install a camera pointed towards a building entrance that has a glass door, leading to strong sunlight during the day. This lighting condition causes individuals entering the building to appear as dark silhouettes. Which camera feature is specifically designed to correct this issue by balancing the light for the entire scene?

Accepted Answer

Wide Dynamic Range (WDR)

Answer

Backlight Compensation (BLC)

Answer

Highlight Compensation (HLC)

Answer

Digital Noise Reduction (DNR)

Question 3

When specifying a camera for a dimly lit warehouse that operates at night, which camera specification is most critical for determining its ability to produce a clear image in low-light conditions without relying on infrared illuminators?

Accepted Answer

Lux Rating

Answer

Focal Length

Answer

IP Rating

Answer

Frame Rate (FPS)

Question 4

You are designing a video surveillance system for a small retail store with 8 cameras, each recording 1080p video (approximately 4 Mbps bitrate) continuously. The client requires a video retention period of 30 days. Which of the following is the closest estimate for the total required storage capacity?

Accepted Answer

10 Terabytes

Answer

2 Terabytes

Answer

4 Terabytes

Answer

20 Terabytes

Question 5

A designer is selecting a lens and camera combination to monitor a specific doorway that is 20 meters away. To ensure the doorway fills a significant portion of the camera's view, which two factors are most important to use in a Field of View (FoV) calculation?

Accepted Answer

Lens Focal Length and Sensor Size

Answer

Camera Resolution and Frame Rate

Answer

IP Rating and Lux Rating

Answer

Video Compression and Bitrate

Question 6

Which of the following factors has the most significant impact on the network bandwidth required for an IP camera stream?

Accepted Answer

Resolution and frame rate

Answer

Camera's physical dimensions

Answer

Type of camera mount used

Answer

Time of day

A system designer needs to select a camera to provide evidential-quality video to identify a person's face at a distance of 10 meters.According to the DORI standard (IEC EN 62676-4), what is the minimum required pixel density for the 'Identification' level?

A system designer needs to select a camera to provide evidential-quality video to identify a person's face at a distance of 10 meters.
According to the DORI standard (IEC EN 62676-4), what is the minimum required pixel density for the 'Identification' level?