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(Automatic License Plate Recognition) Also called "automatic number plate recognition" (ANPR), it is a law enforcement system that optically scans vehicle license plates. Using fixed-position cameras on highways or mobile cameras in patrol cars, the system identifies the plate and matches it against a database of stolen and uninsured vehicles, as well as vehicles registered to drivers with suspended licenses. Equipped with an ALPR, a police official can drive through a parking lot and process the plate number of every parked car. Some systems even photograph the driver.

From Fixed to Mobile
Developed in Europe in the late 1970s, the first systems used fixed cameras at highway intersections. Subsequent systems migrated to mobile use with faster cameras and better recognition algorithms. In addition, laptop computers became more powerful over the years, enabling more economical and effective mobile use.

Toll Collection and Speeding
ALPR is also used with toll collection systems such as E-ZPass to identify vehicles that go through a toll booth without paying and without an RFID tag. It is also used in combination with highway speed detection systems to identify violators and send them speeding tickets.

People Are Always Creative
Drivers have tried to circumvent these systems by obscuring theletters and digits in some manner or by making their plates more reflective with a plastic cover or spray. However, some countries that have used ALPRs have made modifications to the fonts on the next version of their plates to make them easier to identify at high speeds.
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References in periodicals archive ?
Badawy, "Automatic License Plate Recognition (ALPR): A State-of-the-Art Review," IEEE Transactions on Circuits and Systems for Video Technology, vol.
Our products and services include Security Center, a unified security platform built on an open-architecture that seamlessly combines IP-based access control, video management systems, and automatic license plate recognition (ALPR) within a single intuitive interface to simplify operations; Synergis is an IP access control system that heightens an organisation's security with increased readiness to respond to incidents, while leveraging the existing network and security equipment investments.
Therefore, the feature extraction method plays a significant role in these license plate recognition algorithms, which need to extract different sets of features as the input layer of the network.
License plate recognition system based on pulse coupled neural networks and template matching has been studied in China[15].
Carriers nationwide are turning to license plate recognition data to get those photos and provide that proof.
License plate recognition (LPR) is a form of identification of vehicle automatically.
Remarking on the office's launch, Firas Jadalla, regional director for Genetec's Middle East and Africa operation, said: "The opening of our new offices proves to be both timely and strategic in the midst of continuing regional demand for IP video surveillance, access control, and license plate recognition services."
A Kyle city council member says police officers are doing a good job with traditional warrant round ups, but using a California-based company's license plate recognition technology to identify debtors would be unfair to poor drivers and raises privacy concerns, she said.
Road Safety Market by Solution (Red Light Enforcement, Speed Enforcement, Incident Detection Systems, Bus Lane Compliance, Automatic License Plate Recognition), by Service, by Region - Global Forecast to 2020
The innovative License Plate Recognition (LPR) technology is driving the parking management market.
Her car had been picked up by an automatic license plate recognition camera at around 9.25pm on Monday night on the A55 Michelle had spent a few days on holiday in Llandudno in September, but has no connections to the area.