ALPR | Automatic License Plate Recognition | Computer Vision library
kandi X-RAY | ALPR Summary
kandi X-RAY | ALPR Summary
Automatic License Plate Recognition
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Top functions reviewed by kandi - BETA
- Detect license plates in the image
- Detect the character candidates in the license plate
- Detect license plates
- Prune the candidate candidates with the most similar dimensions
- Detects the contours of the contour
- Describe the features of an image
ALPR Key Features
ALPR Examples and Code Snippets
Community Discussions
Trending Discussions on ALPR
QUESTION
I've been trying to look for models that I can use/train as a license plate detector and recognizer. Thing is every time I come across a GitHub repo, they offer off the shelf instructions on how to install dependencies, ready up the model, train and inference.
What confuses me though, is sometimes they link to their website in order to get some API key to go with the code in order to continue training the model and i'm not sure whether the billing aspect of their website often refers to something that hinders me using their GitHub code or refers to something completely irrelevant like billing people to use the GUI (i.e. their website) to train a model instead of flat out doing it yourself from a CLI using their code.
Can someone shed some light on how this generally works?
TLDR: I'm looking, on GitHub, to use/train a model for an ALPR task but most link to their website as part of the instructions on how to continue with their code. How do I know when their websites, that include billings, actually hinder me from using their code on GitHub? (i.e. I don't want to pay for anything. I'd rather train and inference it myself)
Example repo: https://github.com/NanoNets/nanonets-ocr-sample-python
Website they link: http://app.nanonets.com/#/keys
ANSWER
Answered 2020-Dec-18 at 11:30There are github repos of companies, they basically show a demo with their API's and there developers who upload it as a project or whatever. The Company you gave as an example shows a demo of their API's and asks you to buy a key and without that key you won't be able to access their API's I.e they are like a key to your house. What you have to do is make an API and host it. Here you want to do a license plate detector and recognize the character right? So what suggestion I have for you is:
- Make a haar-cascade classifier for detecting the number plate
- Train a mnist model in scikit or whatever library you prefer.
- Make a flask application of the same or any other web framework app
- Host it Heroku
- Heroku is a like a computer in cloud you can deploy several application and deploy it. 6.but everything is not free there for example if you want to name your website car-detector, you won't be able to do in free tier instead your url will look like car-detector.herokuapp.com and if you want a custom domain you have to pay for it and also, if you want to increase the performance of the app you have to pay for it
Here is an flask opencv python app for you to start with https://github.com/dev-Roshan-lab/flask-opencv-app
Regards, Roshan
QUESTION
The program prints perfectly when there is no License Plate in the frame, but when there is, I get the SyntaxError. Node.js and OpenALPR is installed. Photos are successfully being taken also.
ANSWER
Answered 2020-May-01 at 18:11There is a space at the end of the JSON.
QUESTION
I am creating an Automatic license plate recognition for Indian plates. I trained separate models for vehicle detection, license plate detection, and character recognition. I am trying to extract frames from video and process one at a time.
I am using the this darknet framework.
The problem is whenever I run it on my local machine it works fine and gives the following output: see this image of output
...ANSWER
Answered 2020-Apr-29 at 12:16I somehow found the answer by myself. I modified the configuration file for all models.
QUESTION
Just a quick question,
I came across a NumPy array operation which is important for the code and i cannot understand what this does.
...ANSWER
Answered 2020-Feb-18 at 12:58In a 2d numpy array this should give you the first element of each nested list, so for example:
QUESTION
At Ubuntu 18.04 I successfully installed openalpr and tested it. Now I want to use python to call it. To do this, I installed https://pypi.org/project/openalpr/
...ANSWER
Answered 2019-Nov-13 at 13:03After a few hours of searching, I found a solution that doesn't require a package installation pip install openalpr
Go to
QUESTION
I have a kivy program where I need the labels to populate with the data given from a function within my screen class. It works with the update button properly however I would also like for it to populate the labels on load. Here is the python file and the kv file:
py:
...ANSWER
Answered 2019-Dec-11 at 19:55Thanks to a comment on my question I did some more research and reworked the code slightly and this were my findings for anyone else who is having this issue. I use on_pre_enter to call my function and within the function simply update the "label" variables I have to change the text within the kv file. Here is how it looks. I left some of the old code in but commented it out so you can see kind of how it looked before:
.py:
QUESTION
I am writing a php script that makes use of openALPR installed on my linux computer.
When I type "alpr --version" in the terminal, I get this output
...ANSWER
Answered 2018-Oct-23 at 14:00You are probably running that command from the terminal as a different user.
Find out which user php and/or apache is using, then switch user in the terminal.
Try and run the command again.
If the command isn't found, switch back to yourself and type which alpr, which will give you the path.
Then switch back to PHP's user, and ensure the $PATH environment variable includes the folder where the alpr executable is found.
Also, make sure that the executable is actually executable by that user/group. If not, you'll need to use chmod or chown or chgrp to give PHP permission.
If you get stuck, leave a comment!
QUESTION
I want to retrieve a function pointer with dlsym which has const char*s in its prototype. How can I get this done properly, I tried:
ANSWER
Answered 2018-Aug-11 at 13:06typedef void* (*palpr_init_type)(const char*, const char*, const char*, const char*);
palpr_init_type palpr_init = (palpr_init_type)dlsym(...)
QUESTION
I would like to experiment with the OpenALPR SDK and have written a little test program. The problem is, I can't get it to compile properly and I'm not sure why. Here's the SDK documentation.
My source file looks like:
...ANSWER
Answered 2018-Jul-22 at 04:31From the gcc(1) man page:
... the placement of the -l option is significant.
[...]
It makes a difference where in the command you write this option; the linker searches and processes libraries and object files in the order they are specified. Thus,
foo.o -lz bar.osearches libraryzafter filefoo.obut beforebar.o. Ifbar.orefers to functions inz, those functions may not be loaded.
QUESTION
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 \output\recognitionresults.json still does not exist
...ANSWER
Answered 2018-Jul-19 at 11:05According to the documentation you have to redirect the screen output to a file
This command processes a list of image files provided in /source/imagefilelist.txt and writes JSON results to /out/recognitionresults.txt.
$ alpr -j stdin < /source/imagefilelist.txt > /out/recognitionresults.txt
So this should do:
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Install ALPR
You can use ALPR like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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