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License Plate Recognition (LPR)
Introduction
GV-LPR is a digital license plate recognition system that utilizes Neural Network Technology of artificial intelligence to identify vehicle license plates. It comprises a video capture card to acquire images, a software-based engine to recognize characters, a set of I/O modules to integrate with alarm and sensors, and a database to store images for event retrieval or analysis. 1, 2, or 4-lane real-time recording are available.
The Recognition
GV-LPR activates recognition process in two ways. One is by software motion detection, which detects vehicles passing through the camera and illuminator zone. Second is by I/O activation, which the action triggers recognition and recording on I/O activation. For example, a GV-LPR may be connected to a sensor such as magnetic loop detector, overhead laser scanner, or infrared sensor. When these devices are triggered, the system starts the recognition and sends the output signals to trigger devices like gate controller. The system supports two view modes including Camera Overview and Picture-in-Picture with ease of monitoring.
The Integration
The system provides multiple I/O points for connection to devices such as gate controller, infrared detector, loop detection system, or alarms. By exporting the database that logs the captured license plate numbers, GV-LPR can be integrated to systems such as GV-series DVR or ticketing system.
GV-LPR System Architecture
Applications
- Condominiums/Home Gates
- Parking lot management
- Automatic toll collection enforcement
- Traffic enforcement statistics
- Border surveillance
- Stolen vehicle search
Multiple I/O Integration
- The system can be used in conjunction with card reader
- TITO (ticket-in/ticket-out system), and gate control system
- Outputs license plate numbers through RS232 or by file for various integration
- Hot Key Support can be used to manually activate I/O devices
Features
- High recognition rate: 99% (at best performance)
- High recognition speed: less than 0.3 second
- Integrates with GV-series DVR to retrieve video footage by license plate number
- Vehicle counter feature tracks number of vehicles remaining in the parking lot
- by counting vehicles entering and exiting the gate
- Camera overview brings focuses on either the vehicle or the driver
- License plate recognition database are processed and stored in
- Microsoft Access Database for easy and multiple applications
- Multiple recognition technology is applied until a recognition result is reached
- Alarms will be triggered when an unauthorized or unrecognizable
- vehicle is spotted
- Picture-in-Picture window provides camera overview and
- the last recognized image
- Video or AVI file is used as recognition input source
- Digital watermark technology is applied to verify authenticity of video clips
- Text overlay displays license plate numbers on recorded video image
- Activates recognition by sensor triggers, video motion detection or Hot Key
- Recognition result triggers I/O Relay or user-defined application
- Recognizes and displays license plate image registered in database
- Retrievable vehicle entry and exit records by license plate number
- JPEG format support: Allows approximately 10 million JPEG images
- to be saved in a 80GB HDD
- Auto recycle for image storage and database backup
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