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ANPR works properly if the following camera specs, installation, and configuration To ensure recognition of state license plates using appropriate detection tools, it is necessary to install and configure video cameras in such a way that the following requirements are met:

  • Character height is at least 10p10px, preferably 20p 20px or more;.
  • Minimum resolution is 1280*720, . The recommended resolution is 1920*1080;.
  • Minimum frame rate for the Slow mode 5 fps mode, for is 5 FPS. Minimum frame rate for the Fast mode is 20 fps;FPS.
  • Maximum horizontal angle : is 30°;.
  • maximum Maximum vertical angle : is 45°;.
  • Expected image contrast: the contrast difference between characters of the number plate LP and the background should be at least 20 units with an the image brightness scale of from 0 to 255.       
  • In order to recognize state license plates on high-speed roads, the camera should have the Global Shutter mode.