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Questions tagged [openalpr]

Automatic License Plate Recognition library

OpenALPR is an open source Automatic License Plate Recognition library written in C++ with bindings in C#, Java, Node.js, and Python. The library analyzes images and video streams to identify license plates. The output is the text representation of any license plate characters.

http://www.openalpr.com

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AlprNet hosted in Windows service failed to load

When I run this code under my account in Visual Studio debugger _alprNet = new AlprNet("eu", "openalpr.conf", "runtime_data"); if (!_alprNet.IsLoaded()) { Tools.LogError("!!! OpenALPR failed to load."); It works OK and AlprNet loads. But when I…
Vojtěch Dohnal
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How to show specific data from json array using C#

I'm currently doing the license plate recognition for vehicle. The license plate detection is using an API from openAlpr. I don't know how to show the accurate license plate from json string because the first result shows the most accurate license…
Yonce
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SDK install procedure in raspberry pi3 for image processing

I want to install SDK for Automatic License Plate Recognition on Raspberry Pi 3. I have searched with Google but didn't find any instruction on how to install SDK for alpr. Can anyone please show the procedure to install SDK on Raspberry Pi 3 for…
SHASHIKUMAR B J
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App react-native-openalpr crashed on launch

My app is running approximatly 2 seconds and crash... We have time to see the camera working and after nothing, we come back to the main menu on the smartphone. I use an android phone in order to run the package react-native-openalpr.
Nico
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Letters Missing parts with OpenALPR PrepCharsForTraining Utility

I did run openalpr-utils-prepcharsfortraining on numbers and arabic letters, but the dots are cropped out... You can see the result in my output tiff (converted to png). The images were resized to get max height 40px. characters tiff Here is the…
Soufiane Sabiri
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Arabic letters width' problem in OpenALPR training sheet generation

I have created numbers and letters tiles and organized them with a max height of 40px. But when I run openalpr-utils-prepcharsfortraining I get this result: As you can see the arabic letters are having difficult times. Here are the letters in the…
Soufiane S
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ModuleNotFoundError: No module named 'openalpr_api

I am working on the following project in github. https://github.com/ShreyAmbesh/Traffic-Rule-Violation-Detection-System installed all the needed packages for the project but when i try to run the project in pycharm i am getting the following…
Preetha
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OpenALPR Python binding failing when trying to load dll

After downloading the precompiled binaries for Windows of the openALPR library, running the setup.py included in the source code to install it, and running the python_test.bat included in the precompiled binaries directory I get the following…
Roy Henriquez
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openALPR unable to scan eu2 licence plates

I'm using openALPR library with c# and this is my .config file I'v done training for my plates but it can't recognize well plates. I've tried to execute in debug mode. The result of scanning is without any errors but the first line is not…
Alesandro Giordano
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How to install node-openalpr in windows 10

I am using npm i node-openalpr to install , but i am getting error like : node-pre-gyp WARN Using request for node-pre-gyp https download node-pre-gyp ERR! UNCAUGHT EXCEPTION node-pre-gyp ERR! stack Error: node-openalpr package.json is not…
Sahal
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How to solve 'AlprNet' could not be found?

I looked for the answers here and there with no luck, so I decided to ask out. I want to implement openalpr (open source Automatic License Plate Recognition) repository on my own PC and I am following this video to accomplish the task. I have done…
bit_scientist
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Save JSON output of OpenALPR to file in user defined directory - Windows 10

I want to save the output of openalpr json format to a json or text or csv file in a user defined directory. I tried the following, the connection is being established, the data output is appearing on command prompt, but…
Dabbous
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Recognition Russian plate with a different character height in one line OpenALPR

I have a problem with Russian plates. When I want to classifychars with openalpr tool I get something below: OCR cutted my upper fragment of numbers. I generate new .conf file for this country with this parameters: char_analysis_min_pct =…
MarCovy
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Fail to compile library - openalpr

I'm trying to install openalpr on MacOSX El Capitan 10.11.6 and when I tried to run 'make' command, it goes smoothly until it reaches 55% which it generates following errors. Here are the steps that I followed…
jimmy lim
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"train.py: sh: 1: permission denied" after extreme chmod -R 777 and losing sudo command

I want to train OpenALPR's neural network, after finally having success installing it's dependencies. All I need now is to execute train.py, according to the readme in the bottom of this page which I was following, but train.py prompts a persistent…
Youki
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