TECHNOLOGY APPLICATION GUIDE

Video Surveillance - Resolution

Video Infrastructure Considerations as Resolution Increases

(using UHD resolution for example)

Video infrastructure considerations as resolution increases

What is it?

Resolution is the degree of sharpness of an image as measured by the number of pixels across and down on a display screen.

SD (Standard Definition)

  • Commonly referred to as SDTV, 640x480, 480i, 480p, VGA, 704x480,      720x480, D1, SMPTE 293M
  • In Europe, commonly referred to as EDTV, 576i, 576p, 720x576
  • Aspect ratio 4:3

Megapixel

  • Commonly referred to by the number of pixels the camera can display
  • Color fidelity is not standards based
  • Aspect ratio may vary, Frame rates vary by camera

HD (High Definition)

  • Commonly referred to as 720p,1080p, 1080i
  • Color fidelity is based on SMPTE standard
  • Aspect ratio 16:9.  Frame rate 30 fps

UHD (Ultra High Definition)

  • Commonly referred to as 4K, 8K, 2160p, 4320p
  • Color fidelity is based on SMPTE standard
  • Aspect ratio 16:9.  Frame rate 30 fps

Why is it important?

Accurately identifying the resolution required for a viewing area ensures:

  • The level of detail that is needed is captured
  • Managed storage costs
  • Network stability


Not enough resolution can lead to missing details in an image. That loss can result in multiple forms of risk including the inability to use the video for forensics or loss of revenue when used for process or quality monitoring.


Too much resolution can result in increased storage costs, negatively impact network bandwidth and other areas of the video infrastructure.

Best Practices When Choosing a Camera

For all resolutions and applications, it is important to know the typical day-to-day environment where the camera will be located, as well as any extreme environments it may encounter, such as lighting and motion conditions or changes that may impact the required performance. By knowing the focal length of the lens and the distance between the point of interest and the camera, calculate the pixels per foot to maximize the resolution.

General Surveillance Forensics Analytics
Resolution Up to 20 pixels per foot Approximately 40 pixels per foot Typical minimum will be 80 pixels per foot
SD Can be used anywhere The further the point of interest is from the camera, the less ability to identify details of the image Small offices and vestibules, elevators Roughly 10’ x 10’ areas Common in process control lines that are watching general flow through the line
Megapixel Can be used anywhere The further the point of interest is from the camera, the less ability to identify details of the image Common in large areas with adequate lighting Reduced lighting levels can cause noise on the imager chip which will create additional bandwidth usage Common in process control lines that are watching specific details such as whether blades cut vs. tear product, or whether solder welds are clean
HD Common in outdoor areas with adequate lighting Reduced lighting levels can cause noise on the imager chip which will create additional bandwidth usage 720p and 1080p are most common for indoor applications Common in process control lines that are watching specific details where color is a factor for product quality Seen in LPR and facial recognition
UHD Will be used in large auditoriums and exterior applications for collecting an overall perspective Lighting quality is critical Can provide details that the human eye would not be able to see at some distances Lighting quality is critical In development High-detail environments will be supported Lighting quality is critical
Focal Length 8mm, 1/3" Sensor Focal Length 20mm, 1/3" Sensor
Point of Interest 25' 50' 75' Point of Interest 25' 50' 75'
Field of View 15' 30' 45' Field of View 6' 12' 18'
SD 42.7ppf 21.3ppf 14.2ppf SD 106.7ppf 53.3ppf 35.5ppf
720p 48ppf 24ppf 16ppf 720p 120ppf 60ppf 40ppf
1080p 72ppf 36ppf 24ppf 1080p 180ppf 90ppf 60ppf
5MP 172.8ppf 86.4ppf 57.6ppf 5MP 432ppf 216ppf 144ppf
Camera Distance

Featured Products

4K Cameras
Video Servers and Storage
Switches
Contact Anixter

Is your video infrastructure prepared to handle higher resolution images? Contact your local Anixter sales rep to determine the right solution for your needs.




Ask an Expter
Sign-up for Email Updates