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3. Data processing
2. Plate recognition
ANPR is a traffic surveillance method based on optical character recognition (OCR). Captured images or video footages are processed by a specific OCR algorithm to recognize the plate characters. ANPR can be used in any traffic related application using either an existing CCTV / IP camera system or dedicated ANPR cameras which ensure high recognition rates and true 24/7 operation
1. Detection & image capturing
Besides the characters of the license plate, CARMEN® returns numerous additional information as well: recognized plate(s), confidence level assigned to each character- and the whole plate, identified country code, position and plate colors. With all this information in hand, cars can be allowed or denied to enter your car park and Police can check the recognized plate against various national and international databases, black lists / white lists in seconds.
The main software aspect of an ANPR system is reading the plate text from the captured images. This automated recognition is made of several steps, including image normalization and enhancement of the image, detection of the
license plate and distinguishing plate characters. The final step is taken by the OCR algorithm which recognizes the individual characters.
The CARMEN® ANPR is the world leader ANPR software is a result of 20 years countiousdevelopment.
It facilitates country-independent recognition, reading multiple plates from one image, color recognition, state / country identification and extremely fast processing speed.
At the front end of any ANPR system there is a camera that captures images of the plates. The camera plays an important role in the ANPR process as the quality of the captured images highly determines the overall performance
of the system. The best results come if you use specialized cameras designed for ANPR.
ARH offers a wide range of dedicated ANPR cameras that cope with all the adverse environmental conditions that you could face in real-life situations and can be used with any ANPR system.
ANPR is also known as ALPR (Automatic License Plate Recognition), LPR (License Plate Reading), CPR (Car Plate Recognition)
or AVI (Automatic Vehicle Identification)
HOW DOES ANPR WORK IN PRACTICE?
The operation of any ANPR system can be divided into three main steps. It is important to highlight that CARMEN® ANPR technology provides a fully adaptable solution that can be seamlessly integrated with any existing workflow