Radio Frequency Identification & Automatic Number Plate Recognition
TagMaster uses two technologies: Radio Frequency Identification (RFID), and, Automatic Number Plate Recognition (ANPR).
Radio Frequency Identification or RFID is used for automatic identification of objects. The RFID technology’s applications are widespread, as is the technology itself.
There are several frequency bands allocated to RFID operations, ranging from low frequency systems to ultra high frequency systems. In general, high frequencies permit greater data transmission rates. The transmission rate influences the time it takes to actually read an ID tag, limiting at what speed a vehicle may be moving while the ID tag is being identified. Higher frequencies also provide better antennas and a better-defined coverage area (read-lobe).
Low frequency RFID systems (<100 MHz) typically work by induction between the reader and the ID tag and are therefore generally used at short ranges.
RFID Frequency Bands
Proximity systems:125 kHz, 13.56 MHz
Long-range systems: 433 MHz, 860-930 MHz (UHF), 2.4-2,5 GHz, 5.8 GHz
TagMaster provides a number of high performance systems with frequencies ranging from 125 kHz to 2,45 GHz in the product portfolio. TagMaster readers and tags provide high performance identification of ID tags from a distance of up to 14 meters (46 feet).
Automatic Number Plate Recognition or ANPR, is a surveillance method that applies optical character recognition to images to read vehicle registration plates. ANPR can use existing closed-circuit television, roadside enforcement cameras or devices specifically designed for the task.
ANPR can be used to store license plate numbers as well as the associated processed images captured by the cameras. Overview images can also be added to the ANPR event data. Systems commonly use infrared lighting to allow the camera to take pictures at any time of the day.
ANPR provides a unique set of challenges: plate condition, variable fonts, variable reflection properties, different colours, high speeds, acute angles and many other factors which can make the process very demanding. Unlike many other ANPR providers, TagMaster/CitySync designs and develops both hardware and software in-house, usually achieving recognition levels that meet our customers’ highest expectations.
Furthermore, CitySync offers advanced analytics with which we perform recognition algorithms on overview images. This Vehicle Recognition (VR) software enables output of not only the license plates of passing vehicles, but also their makes and colours.