Metrici LPR engine
Distributed license-plate recognition (LPR) engine
Features
- Architecture
- Distributed detection and recognition, free-flow or triggered
- Recognition rate
- More than 99.5%, using an appropriate infrared light source and camera positioning
- Recognition speed
- Less than 100 ms/plate at 200 pixels length
- Plate number deviation
- Up to ±30 degrees in any direction
- Number of recognized plates in each frame
- Unlimited
- Trigger type
- Over UDP from a Barix Barionet 50 LAN controller, from the Metrici LPR web interface, or from another Metrici engine (LPR, PPD, QR, etc.)
- Chained trigger
- Yes, to another Metrici engine (LPR, PPD, QR, etc.)
- Companion stream
- Yes
- Vehicle tracking
- Yes — direction of movement is determined by analyzing successive image frames
- Detection window
- Yes, user definable
- Single plate mode
- Yes
- Number of barriers/gates controlled
- Up to two for each connected camera, driven independently depending on the recognized plate number
- GPS coordinates
- Yes, if a GPS dongle is connected
- Weight
- Yes — the weighing scale should be connected to a Barix Barionet 50 equipped with special Metrici firmware
- Speed
- Yes, by using a Metrici Observer Radar
- Data type for each recognized plate
- Plate number, country code, recognition probability, moving direction of the car, first seen, last seen, location name, camera name, GPS latitude, GPS longitude, car picture, plate number picture, companion picture, weight, speed
- Parallel processing
- Adaptive multithreading, up to 8 threads for each connected camera
- GPU acceleration
- Yes — Intel, AMD or Nvidia supported
- Data push
- POST method over HTTP; two events generated: check_action and reporting
- Plate number syntax check
- Yes, for more than 57 countries, more than one at the same time
- Supported countries
- Albania, Argentina, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Bahrain, Chile, Colombia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Great Britain, Greece, Hong Kong, Hungary, India, Israel, Ireland, Italy, Jordan, Kuwait, Latvia, Lithuania, Luxembourg, Macedonia, Moldavia, Monaco, Montenegro, Netherlands, Norway, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Saudi Arabia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tanzania, Turkey, Ukraine, Zanzibar
System requirements
- OS
- Ubuntu 24.04 LTS MATE, Linux CentOS 7 (64-bit)
- CPU
- Intel i5, i7, i9 or Xeon; AMD Ryzen, Threadripper or Epyc
- GPU
- Intel, AMD or Nvidia; mandatory for more than 2 cameras/server
- System memory
- 512 MB for each connected camera, but no less than 4 GB/server
- GPU memory
- At least 256 MB available for each connected camera
- Storage
- Up to 512 KB for each plate number stored in the buffer, depending on the camera resolution and image compression
- Cameras/server
- Up to 256 connected cameras on each server; unlimited number of servers
- Camera type
- IP; MJPEG, MxPEG, H.264 and H.265 video stream; HTTP or RTSP/RTP transport protocols
- Supported camera producers
- ACTi, Arecont, Avigilon, Axis, Bosch, Dahua, Diviotec, Hikvision, Mobotix, Novus, Pelco, Samsung, Sony, Uniview, Vivotek