pdf417 | A Ruby wrapper for the PDF417 barcode library | Document Editor library
kandi X-RAY | pdf417 Summary
kandi X-RAY | pdf417 Summary
A Ruby wrapper for the PDF417 barcode library
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of pdf417
pdf417 Key Features
pdf417 Examples and Code Snippets
Community Discussions
Trending Discussions on pdf417
QUESTION
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 13:57If 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(...)
.
QUESTION
I have the following example of PDF417 barcode:
which can be decoded with online tool like zxing
as the following result: 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e�¼ô���������¬‚C`Ìe%�æ‹�ÀsõbÿG)=‡x‚�qÀ1ß–[FzùŽûVû�É�üæ±RNI�Y[.H»Eàó¼åñüì²�tØ¿ªWp…Ã�{�Õ*
as 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e~|~~~~~~~~~~d~C`~e%~~~~;To~B~{~dj9v~~Z[Xm~~"HP3~~LH~~~O~"S~~,~~~~~~~k1~~~u~Iw}SQ~fqX4~mbc_
(I don't know which encoding is used to encode this)
The first part of the encoded key that contains barcode is always known and it is 5wwwwwxwww0app5p3pewi0edpeapifxe0ixiwwdfxxi0xf5e
The second part of it can be decoded from the base64string and it always contains 88 bytes. In my case it is:
Frz0DAAAAAAAAAAArIJDYMxlJQDmiwHAc/Vi/0cpPYd4ghlxwDHflltGevmO+1b7GckT/OZ/sVJOSRpZWy5Iu0Xg87zl8fzssg502L+qV3CFwxZ/ewjVKg==
I'm using Swift on iOS device to generate this PDF417 barcode by decoding the provided base64 string like this:
...ANSWER
Answered 2021-Mar-07 at 10:01CIPDF417BarcodeGenerator
has a few more input parameters besides inputMessage
that can have an influence on how the generated barcode looks - see the documentation. Visual inspection/comparison of two codes only makes sense when you know that all these parameters, most importantly inputCorrectionLevel
were equal for both generators.
So, instead of a visual comparison, simply try decoding the barcodes using one of the many scanner apps out there, and compare the decoded bytes.
For your second example, try this:
QUESTION
This is the barcode scanning tutorial I used in my program, so that you have a lot more context when you read my code: Link
Here is what my program does so far: Essentially, when I scan an item's barcode with my phone, the UIAlert pops up with the barcode ID displayed and a button prompting the user to open the "Results" page. This is all fine and good, but how do I pass that same scanned barcode ID into a label on the Result's page? I have been stuck on this for 2 days now, even though it seems like such an easy task.
Any help is much appreciated <3
Here is my relevant code:
ProductCatalog.plist -> Link to Image
Scanner_ViewController.swift (first View Controller) ->
...ANSWER
Answered 2020-Sep-22 at 04:37Do you have a variable to hold the scanned ID in your view controllers? If not, you can add var itemID: String?
to both Scanner_ViewController
and Analysis_ViewController
.
Then in your func where you get the scanned code, you can set it to the variable.
QUESTION
I am working on a rails application that needs to send an piece of HL7 data encoded as PDF417 as JSON over API. The receiver of the barcode encoding will then insert the data into a word document with a PDF417 IDAutomation barcode font.
The problem I am running into is providing an encoding that the font likes.
I've used several encoders, Barby, https://github.com/asee/pdf417, https://github.com/asee/pdf417, which produce arrays of integers(codewords) via text compaction, binary compaction, etc, but all of these are different than what the IDAutomation font expects. Using their encoders it creates a list of 11 rows of numbers 324 chars each.
I seem to be missing a key piece of information here, but having trouble finding the explanation. I found a clue regarding getting the right error correction, row count, and column count values, but it still seems to be a big disconnect between what ID Automation font wants, and these ruby barcode encoders produce. (An array of binary, or an array of codewords)
For example with Barby: Binary:
...ANSWER
Answered 2020-Feb-01 at 15:02The ID Automation font is only going to "like" it's own proprietary encoding scheme, which appears to be using something similar to octal instead of the Barby binary or "tc" decimal. The three schemes all create different PDF417 barcodes with different number of rows and columns.
What you are running into is the stage gap between digitization and rendering. The digitization stage is responsible for turning data into the dots and spaces required for the specific symbology used (Code 128, PDF417, etc). The rendering stage is used to take the ones and zeros and turn those into ink or light up pixels.
You can't mix the two stages because the first stage creates the encoding in the format that the second stage needs.
I tried to convert the ID Automation encoding to binary from what I assumed was octal. It did not scan. The Barby binary encoding scanned like a champ.
QUESTION
What's wrong with this code? I am running the following code in MainActivity
but I get only an empty app:
ANSWER
Answered 2020-Jan-17 at 20:41You should follow Android's documentation for checking and requesting permissions. https://developer.android.com/training/permissions/requesting
I have modified your code and this should be a working sample.
QUESTION
I'm trying to generate a pdf417 barcode in python using treepoem but pycharm keeps giving me the following error:
Traceback (most recent call last):
File "C:/Users/./Documents/barcodes.py", line 175, in image = generate_barcode(barcode_type="pdf417",data=barcode, options=dict(eclevel=5, rows=27, columns=12)) File "C:\Users.\AppData\Local\Programs\Python\Python36-32\lib\site-packages\treepoem__init__.py", line 141, in generate_barcode bbox_lines = _get_bbox(code) File "C:\Users.\AppData\Local\Programs\Python\Python36-32\lib\site-packages\treepoem__init__.py", line 81, in _get_bbox ghostscript = _get_ghostscript_binary() File "C:\Users.\AppData\Local\Programs\Python\Python36-32\lib\site-packages\treepoem__init__.py", line 108, in _get_ghostscript_binary 'Cannot determine path to ghostscript, is it installed?' treepoem.TreepoemError: Cannot determine path to ghostscript, is it installed?
I've tried to install ghostcript, using both the .exe I found online and using pip install ghostscript (successfully completed the first time, and now tells me the requirement is satisfied), yet I still keep getting this error. Any ideas on how to fix it?
...ANSWER
Answered 2017-Aug-23 at 07:36You are installing on Windows, the Windows binary differs in name from the Linux binaries and indeed differs depending whether you installed the 64 or 32-bit version.
On Linux (and MacOS) the Ghostscript binary is called 'gs', on Windows its 'gswin32' or 'gswin64' or 'gswin32c' or 'gswin64c' depending on whether you want the 32 or 64 bit version, and the command line or windowed executable.
My guess is that your script is looking for simply 'gs' and is probably expecting the path to be in the $PATH environment variable, its not clear to me what its expecting.
You could probably 'fix' this by making sure the installation path is in the $PATH environment variable and copying the executable to 'gs.exe' in that directory.
Other than that you'll need someone who can tell you what the script is looking for. Quite possibly you could just grep it.
QUESTION
I was trying to make a class for scanning barcodes with "fast_qr_reader_view: ^0.1.5" dependencies. But when I call this class on my main.dart this error came out "NoSuchMethodError: The method[] was called on null.Receiver:null. Tried calling:"
I already tried writing on the main.dart and works, but when Im calling it from a different class doesn't work
This is my code that shows me the error main.dart
...ANSWER
Answered 2019-Oct-22 at 03:23cameras did not init
you can init cameras in testScan.dart directly
QUESTION
I'm looking to write a few hundred barcodes for work. I want it to be done at the same time as to not manually run a script for each barcode. The script I currently have only writes one barcode when I need 400.
...ANSWER
Answered 2019-Oct-07 at 22:00Try this. I believe you weren't enumerating your barcode.jpg
and were writing to the same file multiple times. You'll want to do to 400 as well to create only 400 barcodes.
QUESTION
I am new to Swift/iOS development and am working on Converting a Swift 3.0 project to Swift 4.2 in order to support newer devices.
In the process I am getting the following error :
Cannot assign value of type '[String]' to type '[AVMetadataObject.ObjectType]?'
Below are the lines of code throwing the error:
...ANSWER
Answered 2019-Sep-16 at 20:10The migrator helps at its best but sometimes the help is misleading.
You can populate the array just with the static members
QUESTION
I use QR code scanner in Android, I want split value but i cant sent result to Main_Activity from ScanActivity,crash the program and I have Error in this below
(Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.BaseBundle.getString(java.lang.String)' on a null object reference at com.exampledemo.parsaniahardik.scanbarcodeqrdemonuts.MainActivity.onCreate(MainActivity.java:26))
Anybody can help me please?
...ANSWER
Answered 2019-Aug-05 at 12:53You can get result from scan activity to your main activity via onActivityResult()
, you can implement it like this:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pdf417
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page