Automatic number plate recognition is a mass surveillance method that uses optical character recognition on images to read vehicle registration plates. They can use existing closed-circuit television or road-rule enforcement cameras, or ones specifically designed for the task. They are used by various police forces and as a method of electronic toll collection on pay-per-use roads and cataloging the movements of traffic or individuals.
ANPR can be used to store the images captured by the cameras as well as the text from the license plate, with some configurable to store a photograph of the driver. Systems commonly use infrared lighting to allow the camera to take the picture at any time of the day.ANPR technology tends to be region-specific, owing to plate variation from place to place.
Concerns about these systems have centered on privacy fears of government tracking citizens' movements, misidentification, high error rates, and increased government spending. We are currently working on some cost effective ANPR software which will read number plates, store the information into a local and/or remote database with optional USB I/O interface card to open barriers/gates. The software will accept both webcams and any static analogue camera via a video capture card.
Accept both webcams and any static analogue camera via a video capture card. The software will be designed to read plates from stationary vehicles as an aid to perimeter access control. Features such as auto check and open, SMS alerts, open via LAN and WAN will also be supported. Automatic Number Plate Recognition (ANPR) is increasingly used by Governments, enforcement agencies and private sector operators to enhance the policing of roads, identifying and monitoring criminal activity and in counter terrorism. While ANPR cameras and supporting technology have improved significantly in recent years, they rely completely on licence plate accuracy. Yet licence plate fraud and the cloning of vehicle identity by changing plates or altering characters is on the increase, seriously impacting ANPR effectiveness. A highly secure method of vehicle identification uses long range Radio Frequency Identification (RFID) fitted to, or embedded within, the licence plate. A unique identifier is transmitted from the RFID tag which is compared with what the ANPR camera is seeing. An alert is created where there is a mismatch or no RFID is present. This can then trigger a response either for an enforcement team at the location or a follow up response from the back-office. Combined ANPR and RFID technology from e-Plate provides the most secure and validated vehicle identification system.
Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint, or mesh wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations, and convenience stores.
CCTV Cameras are available in color, monochrome or cameras that have the ability to switch between color and monochrome (day/night CCTV cameras). The CCTV cameras that switch between color and monochrome are intended for environments of low lighting at various times. There are 2 reasons for using a CCTV camera that can switch between color and monochrome, monochrome CCTV cameras are much more sensitive to low lighting environments, and monochrome CCTV cameras can also be used with Infra red lighting. When there is adequate available light there is the added advantage of using a color CCTV camera for recording color information, for example the color of a car or a person's clothing.
The primary function of a CCTV camera is to convert light into a video signal; all CCTV cameras require an optical lens to focus the light onto an image sensor located directly behind the lens inside the CCTV camera. There are two types of image sensor available, a CCTV camera with a CMOS (Complementary Metal- Oxide Semiconductor) image sensor chip and the other more common type that uses a CCD (Charge Coupled Device) imaging sensor chip. The majority of CCTV cameras and Video Camcorders use a CCD imaging sensor, whereas CMOS imaging sensors are more commonly used in webcams, budget home security cameras and digital photography cameras. CCD cameras are capable of creating a much clearer and higher resolution image.