Camera requirements for License plate recognition (IV)

Camera specifications:

• • the minimum video resolution is 640*480, the recommended resolution is 720p or 1080p;
  • the minimum frame rate is 15 fps, the recommended frame rate is 25-30 fps;
  • Auto Focus and Zoom would be useful for making small adjustments after setting up ANPR;
  • automatic white balance/automatic gain;
  • IR for night mode with good contrast of license plate images;
  • HDR/WDR.

Video requirements:

• • the video image should be clear, contrasting, without distortion, not blurred;
  • the size of the license plate should be 15 − 70% of the total size of the image;
  • the license plate must contain no more than two rows of characters.

Camera installation requirements:

• • the video camera should be mounted at 0.6-2.4 meters above the ground;

  • the angle formed by the lower line of the license plate and the horizon line should be from 0 to 20 degrees.