• Automated Number Plate Recognition, ANPR, Automatic license-plate recognition
  • ALPR, Automatic license-plate reader, Automatic vehicle identification
  • AVI, Car plate recognition, CPR, License-plate recognition,  LPR



is designed to read all vehicle license plate types in the world at any traffic speed. Toll collection and congestion charging systems, traffic monitoring and security, speed and journey time measurement, bus lane and traffic light enforcement, parking or access control and many other systems can benefit from the fast, exact, automatic identification and recognition capabilities of this ANPR/LPR engine.

CARMEN® ANPR reads license plates from many image sources remarkably fast and with the highest recognition accuracy in its class. It offers country-independent recognition of not only of Latin characters, but also Arabic, Cyrillic, Chinese, Korean, Thai and many more, as well as reflective, non-reflective, personalized and special interest plates that are typical in many U.S. states.

Additional Info

    • Industry-leading recognition accuracy (>98% globally)
    • Country-independent license plate reading
    • Exceptionally fast processing speed

      • CARMEN® ANPR provides solution for common problems by:
        • Handling distorted plate images
        • Recognizing also personalized and special interest license plates
        • Integrating easily into existing systems through SDK

          • CARMEN® ANPR is ideal for:
            • Free-flow toll collection and traffic management systems
            • Section speed control and law enforcement applications
            • Parking management and access control
            • ITS and security surveillance systems


              CARMEN® ANPR’s strength comes from its ability to automatically recognize virtually any license plate of vehicles in moving traffic, regardless of country, state or province, plate or character type, and adapts to environmental changes for 24/7 operation. It is fast and easy with straightforward use with any hardware, compatible with any image source (analog / digital / still images / MJPEG video streams) and supports both Windows and Linux platforms. Its development libraries (DLL, SO) allow flexible integration through their SDK, and in server mode CARMEN® ANPR is able to perform parallel processing and handling of unlimited camera inputs.


              Purpose Automatic recognition of vehicle license plates – a number plate recognition software for various intelligent traffic systems, security and any access control environments.
              Supported operating systems Windows (32/64 bit)
              Linux (32/64 bit)
              Supported platforms x86_32 | x86_64 | ARMv7 Cortex A8 and above | PPC
              Minimum system requirements 1 GHz CPU | 512 MB RAM | 1 GB HDD | free port/slot for NNC
              Licensing One license per application thread, multiple license/controller is available
              Available neural network controllers USB 2.0 – type A
              USB – internal, 4 pin
              PCIe card (x1)
              mini-PCIe card (x1) (new!)
              Input Still image from file or memory in any image format 
              (BMP | PNG | JPEG | JPEG2K | RAW) 
              Live analog video input (PAL or NTSC) 
              Live digital /IP camera input
              Output OCR data 
              License plate number in ASCII/UNICODE text 
              Position of the plate 
              Confidence level in percentage 
              Confidence levels for each character 
              List of further suggestions for each character 
              Individual result for each plate on an image 
              Color of plate (optional) 
              Country ID (optional) 
              Location of each plate on one image
              Trigger Can be integrated with any trigger device (recommended when recognizing from live video stream) ) 
              Software motion detection module is included
              Supported programming languages under Windows C/C++, C# 
              Visual Basic .NET 
              Supported programming languages under Linux C/C++, Java
              In the box Development libraries: .dll, .so files 
              Demo application, sample codes for each programming language 
              Neural network controller 
              Comprehensive digital documentation (also available online)
              AVAILABLE VERSIONS FreeFlow 5K / 8K / 11K
              Capacity (images/day) unlimited 5760 / 8640 / 11250
              Processing threads 1 / 2 / 4 parallel threads 4 parallel threads
              Credit buffer unlimited 300 / 240 / 200
              Time for 4 new credits (sec) 60 / 40 / 30


              Technical specifications are subject to change without prior notice. This document does not constitute an offer.

            • WHAT IS ANPR: WHAT IS ANPR? Automatic number plate recognition (ANPR) or automatic license plate recognition (ALPR, LPR) as referred to in the US, is a specialized application in the field of optical character recognition (OCR). OCR, as a technology in general, transforms recorded images of printed characters, numbers and letters to digital text format for post processing, printing, duplication or data management.


              In practice, car plate number registration happens the following way: pictures or video streams of motor vehicles, which are recorded either by CCTV networks or individual purpose-built IP cameras, are fed into special license plate scanning software that recognizes the plate images and reads the characters, converting them into a digital, processable and storable format.

              The ALPR results can then be forwarded to a custom-made user application that utilizes the gathered data for a specific purpose, such as access control, speed enforcement, toll collection, traffic analysis, vehicle identification, etc.

              The ANPR process normally takes no more than a few hundredths of a second, so it is possible to register multiple license plates per second, even by using a single camera and also in high-speed environments. Consistently excellent ANPR/LPR performance, however, depends on many technological factors and the ability to adapt to several environmental variables.

              IMAGE QUALITY

              The license plate reading software primarily needs a workable image to localize and recognize the vehicle registration plate and to read its characters. In most cases ideal images are provided by systems that employ specifically designed cameras that are equipped with appropriate optics and internal or external lighting – a particularly important issue for surveillance in fast-moving traffic and constantly changing light conditions.

              As opposed to cameras installed in controlled internal environments, a 24/7 operating traffic or parking camera should have flexible shutter and brightness controls, to adjust to rapidly changing light conditions, such as direct sun or shadows, pitch black night or blinding headlights. Car plate reading cameras operating in these diverse and constantly changing light conditions should always have built-in high-power infrared (IR) light sources – or they should be connected to an external illuminating unit – with the aim to produce images suitable for automatic license plate recognition.

              For a range of our purpose-built recognition cameras, please check our ANPR camera product line.

              The resulting ANPR system using a dedicated ANPR camera, with the help of the OCR software is normally able to read the plates of moving vehicles even at 250 km/h (155 mph) in any environment.


              Automated number plate recognition may be deployed at any place where vehicle access control, traffic and toll enforcement, license plate number registration and statistical applications are feasible through car plate reading.

              As a core technology, ARH’s automatic license plate recognition software is designed to integrate into any application around the world – regardless of the alphanumeric character type, form or color of car number plate or the environmental surroundings.

              Our flagship ANPR software: CARMEN® FreeFlow can cover all of these challenges; its strength is in its almost limitless range of utilization, the near 100% rate of recognition and its country-independent software engine.


              To find out more about how CARMEN® fits into the big picture – from triggering through dedicated license plate capture cameras all the way to end-user applications – go to CARMEN.hu.


              camera independent • scalable • high speed • reliable • high accuracy • country-independent • customizable • multi-platform • real-time results

              Carmen® is the brand name of our cutting edge ANPR software family. It is a flexible and scalable solution to all kinds of traffic, parking, tolling or enforcement applications.

              Carmen® ANPR’s strength comes from its ability to automatically recognize virtually any license plate of vehicles in moving traffic, regardless of country, state or province, plate or character type. It is fast and easy, offering straightforward use with any hardware, compatible with various image sources (analog / digital / still images / MJPEG video streams) and supports both Windows and Linux platforms. Its development libraries (DLL, SO) allow flexible integration through their SDK, and in server mode Carmen® ANPR is able to perform parallel processing and handling of unlimited camera inputs.


              The CARMEN® ANPR software package consists of the following components:

              • Automatic number plate recognition engine (region specific)
              • Neural Network Controller (NNC)
              • Function libraries
              • Demo and test applications
              • Tutorial and sample applications both in executable and source code forms
              • Licence file

              Since image quality is one of the key factors to achieve successful license plate recognition, we recommend using digital cameras made specifically for ANPR purposes. For a range of our purpose-built recognition cameras please check our recognition camera portfolio.
              The whole software package comes in the form of an SDK, further integration into any user made business logic is possible through its API, compatible with any system that operates in a Windows or Linux environment.


              To ensure you always have the highest recognition rates covering all the new plate types released, part of our solution is a regular update service for both of your ANPR software and the recognition engine. To find out more about the engine specific licenses, the non-expiration of individual licenses, description of the updating process and the availability of multiple licenses, check out our licensing and update policy page.

              CARMEN® VERSIONS

              In order to accommodate diverse needs, ARH offers different Carmen® versions for different applications:
              Carmen® FreeFlow is able to handle massive workloads generated by a multi-lane, multi-camera highway application – potentially processing hundreds of thousands of images per day.

              Carmen® 5k / 8k / 11k versions have been designed to manage smaller tasks like less intense roads and parking solutions, these are cost effective versions of the same high standard ANPR/LPR technology.

              To help you find the right version for your business needs, please check out our comparative video of Carmen® ANPR versions. Or simply go to the Media tab for more information.

            • MEDIA: MEDIA anpr software versions
              LINKS & DOWNLOADS
              CARMEN® ANPR SOFTWARE BROCHURE pdf   Product description in PDF
              CARMEN® SOFTWARE VERSIONS pdf icon   A comprehensive review of all CARMEN® software versions
              ARH PRODUCT CATALOG pdf   Comprehensive brochure showcasing all of our traffic, license plate recognition, passport, travel document, ID reader and biometric (AFS/AFIS) products
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