To ensure the recognition of state license plates with License plate recognition (BRS), it is necessary to install and configure the cameras to meet the following requirements:

Camera
  • Minimum video resolution is 640*480, recommended resolution is 720p or 1080p
  • Minimum frame rate is 15 FPS, recommended frame rate is 25–30 FPS
  • Autofocus and zoom would be useful for making small adjustments after configuring the detection tool
  • Auto white balance
  • IR for night mode with good contrast of license plate images
  • HDR or WDR
  • In order to recognize state license plates on high-speed roads, the camera must have the Global Shutter mode

Correct operation of the detection tool isn't guaranteed if you use frames that were masked before they got into Axxon One by an IP camera or similar methods.

Video
  • Video image must be clear, contrasting, without distortion, not blurred
  • Video image must have minimum noise in low light conditions
  • Size of the license plate must be 15–70% of the total size of the image
  • License plate must contain no more than two rows of characters

Camera installation

  • Video camera must be mounted at 0.6–2.4 meters above the ground
  • Angle formed by the lower line of the license plate and the horizon line must be from 0 to 20 degrees