ANPR Cameras
Introduction
Effective image capture is the most critical element of a successful ANPR system. Without proper design, external environmental issues such as headlight glare, low sunlight, partial plate shading, extreme sunlight glare and poor weather conditions can make it difficult to effectively capture the number plate image. Most of these problems come from uncontrolled lighting in the external environment.
PIPS Technology’s camera design suppresses all of these external lighting sources, returning the light from the plate reflection via the camera’s internal illuminator. PIPS camera / illuminator systems have a ring of infra-red (IR) LEDs surrounding a high sensitivity camera, all housed in a single waterproof housing. Using a patented filter/flash technique, PIPS is able to obtain bright illumination of the plate, while filtering out glare from external sources.
IR illumination gives the best capture performance for the following reasons:
PIPS Technology’s camera design suppresses all of these external lighting sources, returning the light from the plate reflection via the camera’s internal illuminator. PIPS camera / illuminator systems have a ring of infra-red (IR) LEDs surrounding a high sensitivity camera, all housed in a single waterproof housing. Using a patented filter/flash technique, PIPS is able to obtain bright illumination of the plate, while filtering out glare from external sources.
IR illumination gives the best capture performance for the following reasons:
- Number plates are highly reflective to IR
- It is invisible to the human eye and can be used covertly - even at night
- Cameras utilising IR can filter out visible light, thus eliminating the effects of headlight or sunlight glare
- It penetrates rain and fog better than visible light
