SimpleLPR

License Plate Recognition SDK

Automatic License Plate Recognition

What is SimpleLPR?

SimpleLPR is a software component aimed at vehicle license plate recognition (see LPR, ANPR). It has a very simple application programming interface that allows applications to supply a path to an image or a pointer to a buffer in memory, and return the detected license plate number and its location in the input image.

It can be used from C++, or any .NET enabled programming languages such as Visual Basic .NET, C#, VB Script, or JScript. Integration is simple and straightforward, as demonstrated in the examples supplied with the SDK.

Typical successful detection rates range from 85% to 95% provided that license plates are in good condition, unoccluded, and the text height is at least 20 pixels.

Supported countries

Albania
Algeria
Andorra
Argentina
Australia
Austria
Azerbaijan
Belarus
Belgium
Bolivia
Bosnia and Herzegovina
Botswana
Brazil
Bulgaria
Cambodia
Cameroon
Canada
Cape Verde
Chile
Colombia
Costa Rica
Croatia
Cuba
Cyprus
Czech Republic
Democratic Republic of the Congo
Denmark
East Timor
Ecuador
El Salvador

Estonia
Finland
France
Georgia
Germany
Ghana
Greece
Guatemala
Honduras
Hungary
Iceland
India
Indonesia
Ireland
Israel
Italy
Jordan
Kazakhstan
Kenya
Kyrgyzstan
Latvia
Lebanon
Lithuania
Luxembourg
Macau
Malaysia
Mozambique
Myanmar
Namibia
Netherlands

Norway
Pakistan
Palestinian National Authority
Paraguay
Peru
Philippines
Poland
Portugal
Puerto Rico
Republic of the Congo
Romania
Russia
Singapore
Slovakia
Slovenia
South Africa
Spain
Sri Lanka
Sweden
Switzerland
Tanzania
Turkmenistan
Turkey
United Kingdom
Ukraine
Uruguay
Uzbekistan
Venezuela
Vietnam
Zimbabwe

Screenshot

Supported platforms

Windows 10
Windows 11
Windows Server 2016
Windows Server 2019
Windows Server 2022
Linux x64

Limitations

For best results, input images should feature straight views of license plates, and text on license plates should be horizontally aligned.
The height of the text on the license plates should be at least 20 pixels.
Assuming the input images meet the above conditions, the detection accuracy should be around 90%.

Download the latest version 3.5.7.0

Download an unlicensed copy of SimpleLPR with GPU support (50 MB)

or for CPU only (35 MB).

Purchase a licensed copy of SimpleLPR.

Download SimpleLPR for Linux (x64 only, no CUDA).

Download the SimpleLPR user's guide.

[Download CUDA dependencies (701 MB)]

See the change log.

View sample code.

Product registration

The unlicensed version will be fully functional during 60 days.

The licensed version costs $450 plus local taxes. Licensing entitles owners to distribute a royalty free unlimited number of copies of SimpleLPR along with their applications.

Contact support

You can submit your questions/issues/bug reports/feedback to support@warelogic.com