Nummerplåtigenkänning

Nummerplåtigenkänning, often abbreviated as ANPR (Automatic Number Plate Recognition) or LPR (License Plate Recognition), is a technology that uses optical character recognition to read vehicle license plates. This system typically involves a camera, lighting, and software to capture an image of a license plate and then extract the alphanumeric characters. ANPR systems are widely used for various purposes, including law enforcement, traffic management, and access control.

The process begins with capturing an image of the vehicle. Specialized cameras with high resolution and infrared lighting are often employed to ensure clear plate visibility, even in low-light conditions or when the plate is dirty. The captured image is then processed by software that identifies the plate's location within the image and isolates the characters. Optical character recognition algorithms are applied to convert the image of the characters into machine-readable text.

Applications of nummerplåtigenkänning are diverse. Law enforcement agencies use it to identify stolen vehicles, track down suspects, and enforce traffic laws. In toll collection systems, ANPR facilitates automatic payment by identifying vehicles and linking them to accounts. Parking facilities utilize it for entry and exit management, as well as for monitoring parking durations. Additionally, it plays a role in traffic flow analysis and congestion monitoring by identifying individual vehicles and their travel times. The accuracy of ANPR systems can be affected by factors such as plate condition, lighting, angle, and speed of the vehicle.