ZBar | Clone of the mercurial repository http | Computer Vision library

by ZBar C Version: iPhoneSDK-1.3.1 License: LGPL-2.1

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kandi X-RAY | ZBar Summary

ZBar is a C library typically used in Artificial Intelligence, Computer Vision, OpenCV applications. ZBar has no bugs, it has no vulnerabilities, it has a Weak Copyleft License and it has medium support. You can download it from GitHub.

ZBar Bar Code Reader is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Codabar, Interleaved 2 of 5 and QR Code. Included with the library are basic applications for decoding captured bar code images and using a video device (eg, webcam) as a bar code scanner. For application developers, language bindings are included for C, C++, Python and Perl as well as GUI widgets for Qt, GTK and PyGTK. Check the ZBar home page for the latest release, mailing lists, etc. License information can be found in COPYING.

Support

Quality

Security

License

Reuse

Support

ZBar has a medium active ecosystem.

It has 2399 star(s) with 1044 fork(s). There are 128 watchers for this library.

It had no major release in the last 6 months.

ZBar has no issues reported. There are 18 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of ZBar is iPhoneSDK-1.3.1

Quality

ZBar has no bugs reported.

Security

ZBar has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ZBar is licensed under the LGPL-2.1 License. This license is Weak Copyleft.

Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

Reuse

ZBar releases are not available. You will need to build from source code and install.

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ZBar Key Features

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ZBar Examples and Code Snippets

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Community Discussions

Trending Discussions on ZBar

Pyzbar recognizes EAN-13 barcode as PDF417?

reading decoded zbar element messages from gst pipeline bus

QR code detection with ZBar from console fails for valid QR codes (ZBarCam from camera detects them fine)

Overaly image functionality for cn1-codescan lib

Decode a qr-code in Python 3.6 in Anaconda 4.8.3 on 64 bit Windows?

How to get Zxing in python working with Heroku?

import pyzbar.pyzbar - Unable to find zbar shared library

Zbar Scanner Error java.lang.RuntimeException: cancelAutoFocus failed

Preprocessing images for QR detection in python

Android Studio build works, Gradle command line fails

QUESTION

Pyzbar recognizes EAN-13 barcode as PDF417?

Asked 2021-May-07 at 13:57

I'm trying to build a realtime barcode reader using pyzbar. I have only EAN-13 barcodes and some of them are read properly but some are recognized as PDF417 and I get this message: WARNING: .\zbar\decoder\pdf417.c:89: : Assertion "g[0] >= 0 && g[1] >= 0 && g[2] >= 0" failed How to increase efficiency? Maybe there is another python library which I can use?

This is my code:

...

ANSWER

Answered 2021-May-07 at 13:57

If you only have EAN-13, you could specify that so pyzbar would only check for EAN-13. You can specify the desired codes in a list to the parameter symbols when calling decode(...).

Source https://stackoverflow.com/questions/67436051

QUESTION

reading decoded zbar element messages from gst pipeline bus

Asked 2021-Mar-17 at 23:14

Using the example CLI (command-line-interface) pipeline from the documentation:

...

ANSWER

Answered 2021-Mar-17 at 23:14

After not finding anything, anywhere online, I decided to read the manual again to get a better understanding of the mechanisms behind. The answer was quite simple: message.get_structure().to_string()

Also we can probe when this is triggered by seeing when t == Gst.MessageType.ELEMENT

Source https://stackoverflow.com/questions/66573365

QUESTION

QR code detection with ZBar from console fails for valid QR codes (ZBarCam from camera detects them fine)

Asked 2020-Nov-14 at 21:36

I used Zbar (and ZXing) to read the QR code in many images like the below one, but both failed to detect it. I think I need some transformation, because when I use ZBarImg from console, it fails. On the other side, when I use ZBarCam and I put the document in front of the webcam on my laptop, it detects and decodes QR code instantly.

There are images that QR is detected correctly and images really similar to the successful ones that fail.

I tried to use ImageMagick to resize the image, remove borders, greyscale, blur it, deskew, multiple scripts from @fmw42 "Fred's ImageMagick Scripts" (unperspective...). Nothing helped. I judge it has to be some simple transformation, because ZBarCam does it almost instantly.

Do you have any idea?

...

ANSWER

Answered 2020-Nov-14 at 21:36

I am not sure what you have tried in Imagemagick, but my unperspective will not help this image. It will not correct for wrinkles.

But here is what I would do. First threshold, then apply morphology. The use connected components to get get the bounding box of QR code block. The crop the QR code out of the original image and use morphology to make the black regions more distinct.

Input:

Source https://stackoverflow.com/questions/64831824

QUESTION

Overaly image functionality for cn1-codescan lib

Asked 2020-Oct-30 at 06:04

I am using this lib https://github.com/codenameone/cn1-codescan to scan QR codes in my application. As I understand there is no functionality to change scanning/camera view right now in this lib

Currently, scanning view for Android it is just fullscreen camera view and for iOS smth like this http://zbar.sourceforge.net/iphone/userguide/scanning.html

Is there any way to add an overall image or change that camera view? Or is there any plans to add some LayredPane to the camera view in this lib?

...

ANSWER

Answered 2020-Oct-30 at 06:04

This won't work for cn1-codescan since that library is implemented as an external native view. So we're effectively leaving Codename One to perform the scan. You can implement this natively within the library.

Alternatively you can build a library that uses a widget approach instead of moving to a separate activity/view like the current solution. If it uses a peer component (like the camera kit or the Google Maps cn1libs) then you can implement overlays in Codename One.

Notice that we only use zbar on iOS and on Android we use an activity which uses an external app to do the scanning. There's a 3rd party QR scanner (from Little Monkey) which embeds an Android implementation into the cn1lib. I'm not sure about the overlay implementation there.

Source https://stackoverflow.com/questions/64598505

QUESTION

Decode a qr-code in Python 3.6 in Anaconda 4.8.3 on 64 bit Windows?

Asked 2020-Aug-20 at 16:29

How can I decode a qr code in python 3.6 in Anaconda 4.8.3 a Windows 10 Pro N 64 bit installation?

Most solutions require Pillow with zbar. However, it appears zbar is only available on 32bit windows installations. Furthermore, pip install zbarlight yields:

ERROR: No matching distribution found for pyzbarlight

To try and decode a qr code in python 3.6 in Anaconda 4.8.3 on a Windows 10 Pro N 64 bit device, I tried the following code:

...

ANSWER

Answered 2020-Aug-07 at 09:41

Windows error message

If you see an ugly ImportError when importing pyzbar on Windows you will most likely need the Visual C++ Redistributable Packages for Visual Studio 2013. Install vcredist_x64.exe if using 64-bit Python, vcredist_x86.exe if using 32-bit Python.

visit and read please here https://pypi.org/project/pyzbar/ or github homepage https://github.com/NaturalHistoryMuseum/pyzbar

I use Ubuntu for my purposes, so I cannot check this out, but in home project README they give information about ugly ImportError. If they talk about 64 bit installation, then pyazbar works on 64-bit Windows, please doublecheck that Visual C++ Redistributable Packages for Visual Studio 2013 is properly installed and other requirements are satisfied also.

Source https://stackoverflow.com/questions/63296571

QUESTION

How to get Zxing in python working with Heroku?

Asked 2020-Aug-09 at 12:50

I am deploying a python flask app to heroku which uses Zxing to read qr codes(scan them) and give out the data on them, however Zxing requires Java on the heroku environment.

Zxing : https://github.com/dlenski/python-zxing

Error with Zxing

...

ANSWER

Answered 2020-Aug-09 at 12:50

I have managed to solve my error by adding the buildpack

Source https://stackoverflow.com/questions/63324973

QUESTION

import pyzbar.pyzbar - Unable to find zbar shared library

Asked 2020-Aug-03 at 04:49

I want to make a script for detecting and reading QR codes from photos. I would like to use PyZbar for that, but I have a problem with some errors.

I'm working in google colaboratory

...

ANSWER

Answered 2020-Aug-03 at 04:49

Before you can !pip install pyzbar, you need to install libzbar with this command.

Source https://stackoverflow.com/questions/63217735

QUESTION

Zbar Scanner Error java.lang.RuntimeException: cancelAutoFocus failed

Asked 2020-Jun-05 at 03:10

my app contains barcode scanner, i used Zbar scanner and it worked but the following error keeps appearing and I searched alot I didn't find any solution the error :

...

ANSWER

Answered 2020-Jun-05 at 03:10

i found the problem in the code I should remove mScannerView.startCamera() from onResume method

Source https://stackoverflow.com/questions/62116926

QUESTION

Preprocessing images for QR detection in python

Asked 2020-May-11 at 20:21

I used Zbar and OpenCV to read the QR code in the image below but both failed to detect it. For ZBar, I use pyzbar library as the python wrapper. There are images that QR is detected correctly and images really similar to the successful ones that fail. My phone camera can read the QR code in the uploaded image which means it is a valid one. Below is the code snippet:

...

ANSWER

Answered 2020-Apr-27 at 03:08

zbar, which does some preprocessing, does not detect the QR code, which you can test running zbarimg image.jpg.

Good binarization is useful here. I got this to work using the kraken.binarization.nlbin() function of the Kraken library. The library is for OCR, but works very well for QR codes, too, by using non-linear processing. The Kraken binarization code is here.

Here is the code for the sample:

Source https://stackoverflow.com/questions/61442775

QUESTION

Android Studio build works, Gradle command line fails

Asked 2020-Apr-09 at 11:22

I have ported an app from Eclipse to Android Studio, implemented my needed flavors and have it allow working in Android Studio. Due to the number of flavors I would prefer to build it using command line Gradle. However when I run the following command to build my release APKs

...

ANSWER

Answered 2019-Jan-26 at 02:44

For anyone facing this issue in the future, for the command line build make sure your JAVA_HOME is set to the same version as Android Studio is using. E.g. JDK v8:

Source https://stackoverflow.com/questions/45762245

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install ZBar

You can download it from GitHub.

Support

Bugs can be reported on the sourceforge project page http://www.sourceforge.net/projects/zbar/. Please include the ZBar version number and a detailed description of the problem. You’ll probably have better luck if you’re also familiar with the concepts from: http://www.catb.org/~esr/faqs/smart-questions.html.

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