# OpenALPR

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Automatic number-plate recognition library

OpenALPR Original author Matthew Hill[1] Developers OpenALPR Technology, Inc.[2] Release 2 May 2014; 12 years ago (2014-05-02)[2] Stable release 2.5.103 / March 5, 2018; 8 years ago (2018-03-05) Written in C, C++, Python, Java, and C# Operating system Linux, Windows[3] Platform IA-32 (i386), x86-64 or ARM Size 276 MB Available in 1 languages List of languages English Type Automatic number-plate recognition License Proprietary and AGPL Website www.openalpr.com Repository github.com/openalpr/openalpr

**OpenALPR** is an [automatic number-plate recognition](/source/Automatic_number-plate_recognition) [library](/source/Library_(computing)) written in [C++](/source/C%2B%2B). The software is distributed in both a commercial and [open source](/source/Open-source_software) version.

## History

OpenALPR was originally developed by a two-man team led by Matt Hill.[1] The open source software became available as a free download at the end of 2015.[4] In March 2016, OpenALPR launched a paid Cloud API service[5] and in February 2017 introduced the OpenALPR agent for [Axis Communications](/source/Axis_Communications) cameras.[6]

In August 2017 an [Australian](/source/Australia) web developer Tait Brown became known by creating an alternative to an 86 million [AUD](/source/Australian_dollar) project of [Victoria Police](/source/Victoria_Police) by using OpenALPR.[7] In March 2018 [ProgrammableWeb](/source/ProgrammableWeb) added OpenALPR to its list of Recognition APIs.[8]

## Software

OpenALPR is an [automatic number-plate recognition](/source/Automatic_number-plate_recognition) [library](/source/Library_(computing)) written in [C++](/source/C%2B%2B).[9] The software is distributed in both a commercial cloud based version[1] and [open source](/source/Open-source_software) version.[3][10] OpenALPR makes use of [OpenCV](/source/OpenCV) and [Tesseract OCR](/source/Tesseract_(software)) libraries. It could be run as a command-line utility, standalone library, or background process. The software also integrates with [video management systems](/source/Video_management_system) (VMS) such as Milestone XProtect.[11]

## References

1. ^ [***a***](#cite_ref-ars_1-0) [***b***](#cite_ref-ars_1-1) [***c***](#cite_ref-ars_1-2) Farivar, Cyrus (December 5, 2015). ["New software watches for license plates, turning you into Little Brother"](https://arstechnica.com/information-technology/2015/12/new-open-source-license-plate-reader-software-lets-you-make-your-own-hot-list/). *[Ars Technica](/source/Ars_Technica)*. Retrieved June 11, 2018.

1. ^ [***a***](#cite_ref-opengit_2-0) [***b***](#cite_ref-opengit_2-1) Hill, Matthew. ["state_detector.cpp"](https://github.com/openalpr/openalpr/blob/master/src/statedetection/state_detector.cpp). [GitHub](/source/GitHub). Retrieved June 21, 2018.

1. ^ [***a***](#cite_ref-extreme_3-0) [***b***](#cite_ref-extreme_3-1) Cardinal, David (August 4, 2016). ["How to get started with DIY home surveillance systems"](https://www.extremetech.com/electronics/232428-home-video-monitoring-for-the-do-it-yourselfer-an-overview). [ExtremeTech](/source/ExtremeTech). Retrieved June 11, 2018.

1. **[^](#cite_ref-4)** ["New Software Allows You to Scan License Plates Just like a Cop"](https://www.autoevolution.com/news/new-software-allows-you-to-scan-license-plates-just-like-a-cop-102736.html). *autoevolution.com*. December 9, 2015. Retrieved June 11, 2018.

1. **[^](#cite_ref-5)** ["OpenALPR Technology Releases Cloud Service for Automatic License Plate Recognition and Vehicle Classification"](https://security.world/topic/openalpr-technology-releases-cloud-service-for-automatic-license-plate-recognition-and-vehicle-classification/). *security.world*. March 7, 2016. Retrieved June 23, 2018.

1. **[^](#cite_ref-6)** Waitt, Tammy (February 13, 2017). ["OpenALPR & Axis Offer Affordable ALPR Service Plans (See Video)"](https://americansecuritytoday.com/openalpr-axis-offer-affordable-alpr-service-plans-see-video/). *americansecuritytoday.com*. Retrieved June 23, 2018.

1. **[^](#cite_ref-7)** Brown, Tait (August 28, 2017). ["How I replicated an $86 million project in 57 lines of code"](https://medium.freecodecamp.org/how-i-replicated-an-86-million-project-in-57-lines-of-code-277031330ee9). [freeCodeCamp](/source/FreeCodeCamp). Retrieved June 11, 2018.

1. **[^](#cite_ref-8)** Culbertson, Joy (March 31, 2018). ["Daily API RoundUp: FlexAwards, Amazon GameOn, Blockbridge"](https://web.archive.org/web/20180623141535/https://www.programmableweb.com/news/daily-api-roundup-flexawards-amazon-gameon-blockbridge/brief/2018/03/31). *[ProgrammableWeb](/source/ProgrammableWeb)*. Archived from [the original](https://www.programmableweb.com/news/daily-api-roundup-flexawards-amazon-gameon-blockbridge/brief/2018/03/31) on June 23, 2018. Retrieved June 23, 2018.

1. **[^](#cite_ref-9)** Bhadoria, Shantanu; Oliva Ramos, Ruben (2017). ["Erase Parking Headaches with OpenCV and Raspberry Pi"](https://books.google.com/books?id=KkBPDwAAQBAJ&pg=PA82). *Raspberry Pi 3 Home Automation Projects: Bringing your home to life using Raspberry Pi 3, Arduino, and ESP8266*. Packt Publishing Ltd. p. 82. [ISBN](/source/ISBN_(identifier)) [978-1-78328-387-3](https://en.wikipedia.org/wiki/Special:BookSources/978-1-78328-387-3) – via Google Books.

1. **[^](#cite_ref-iprogrammer_10-0)** James, Mike (December 18, 2015). ["Openalpr - An Open Source Licence Plate Reader"](http://www.i-programmer.info/news/105-artificial-intelligence/9246-openalpr-an-open-source-licence-plate-reader.html). *i-programmer.info*. Retrieved June 23, 2018.

1. **[^](#cite_ref-ipvm_11-0)** Karas, Brian (March 22, 2016). ["SaaS LPR Startup OpenALPR Examined"](https://ipvm.com/reports/company-profile-openalpr). *ipvm.com*. Retrieved June 21, 2018.(subscription required)

## External links

- [Official website](http://www.openalpr.com)

- [OpenALPR at GitHub](https://github.com/openalpr/openalpr)

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Adapted from the Wikipedia article [OpenALPR](https://en.wikipedia.org/wiki/OpenALPR) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/OpenALPR?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.