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The following video camera requirements should be met in order to ensure the recognition of license plate numbers using the Auto-Intellect system.

№

Property

Range

Comment

1

Camera type

Analog color PAL camera, or analog monochrome CCIR camera

IP cameras with not less than 25 fps and 4 Mbit/s bitrate also can be used.

2

Camera resolution

Not less than 320x240

 


3

Illuminance in the monitored area

Not less than 0.02 lux

 


4

Signal/noise ration

50 dB or more

 


5

Auto aperture and auto electronic shutter

1/1000

 


6

Focal length

4-8 mm for 1/3'' CCD
Lens with adjusting focal length and auto aperture can be used.

 


It is not recommended to use the frame resolution more than 352 x 288 (CIF) because it will result in large spend of recources resources and video will be compressed until 352 x 288 (CIF).

...

If the camera meets the main requirements (see the General requirements for mounting and configuring of cameras section) and is aimed at the recommended directions, up to six lanes can be processed in case of a central camera location, and up to four lanes in case of a side location.

If recomendations recommendations for parameters, mounting and configuring video camera are fulfilled, the typical error of counting the following characteristics will be as follows:

...

Conditions of applicability of the Traffic DetectorDetection module are following:

  • visibility of vehicle or vehicle headlight (at night) - not less than 50m;
  • speed of vehicle - more than 20 km/h;
  • statistical sampling - not less than 1000 vehicles.

When mounting the Traffic Detector camerasDetection cameras, follow these recommendations:

...