Camera requirements for License plate recognition (RR)

ANPR works properly if the following camera specs, installation, and configuration requirements are met:

• Character height at least 10p, preferably 20p or more;
• Minimum resolution 1280*720, recommended 1920*1080;
• Minimum frame rate for Slow mode 5 fps mode, for Fast mode 20 fps;
• Maximum horizontal angle: 30°;
• maximum vertical angle: 45°;
• Expected image contrast: the contrast difference between characters of the number plate and the background should be at least 20 units with an image brightness scale of 0 to 255.