kandi X-RAY | zbar Summary
kandi X-RAY | zbar Summary
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 93, Code 39, Codabar, Interleaved 2 of 5, QR Code and SQ 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 2 and Perl as well as GUI widgets for Qt, GTK and PyGTK 2.0. Zbar also supports sending the scanned codes via dbus, allowing its integration with other applications.
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zbar Key Features
zbar Examples and Code Snippets
Trending Discussions on zbar
I have configured crashlytics as per Firebase Documentation https://firebase.google.com/docs/crashlytics/get-started?platform=android. But crash reports not generated and uploaded to server.
Kindly refer my build details.
Here is our project-level build.gradle...
ANSWERAnswered 2022-Apr-11 at 14:08
There was another utility logger library initialized in the application class that prevented crashlytics from collecting log. https://github.com/hypertrack/hyperlog-android
Also the initialization & manifest part is not necessary unless you want to explicitly enable/disable crashlytics working.
I would use a MinGW library in Visual Studio project.
How my system is built:
I downloaded ZBar library for my Windows 10 system ( zbar-0.23.91-win_x86_64-DShow.zip
This is the link: https://linuxtv.org/downloads/zbar/binaries/).
I have these files in the folder of lib and bin:
Error when build:
error LNK2019: unresolved external symbol __mingw_vsnprintf referenced in snprintf
Do libraries compiled with MinGW work with MSVC?
ANSWERAnswered 2021-Nov-23 at 13:05
The problem is that the libraries have been compiled with mingw while I need to compile them in an mscv project.
The solution was to rebuild the library with Visual Studio.
It was possible to use everything without problems.
I have fragment which contain recyclerview. if progaurd was not enabled everything works fine. if i enable the progaurd then data coming from API is not setting. if i put breakpoint it's not reaching the constructor but fragment is setting,recyclerview showing null data.
I have added progaurd rules also please check...
ANSWERAnswered 2021-Aug-18 at 10:41
i found the issue. and its resolved. when progaurd is enabled firebase class files are deleted so i added one rule and then its resolved.
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 && g >= 0 && g >= 0" failed How to increase efficiency? Maybe there is another python library which I can use?
This is my code:...
ANSWERAnswered 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
Using the example CLI (command-line-interface) pipeline from the documentation:...
ANSWERAnswered 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:
Also we can probe when this is triggered by seeing when
t == Gst.MessageType.ELEMENT
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?...
ANSWERAnswered 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.
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?...
ANSWERAnswered 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.
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:...
ANSWERAnswered 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.
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.
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.
Error with Zxing...
ANSWERAnswered 2020-Aug-09 at 12:50
I have managed to solve my error by adding the buildpack
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...
ANSWERAnswered 2020-Aug-03 at 04:49
Before you can
!pip install pyzbar, you need to install libzbar with this command.
No vulnerabilities reported
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