barcode | a barcode creation lib for golang | Barcode Processing library
kandi X-RAY | barcode Summary
kandi X-RAY | barcode Summary
This is a package for GO which can be used to create different types of barcodes.
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barcode Key Features
barcode Examples and Code Snippets
Lines of Code : 9License : Permissive (MIT License)
Copypublic static BufferedImage generateQRCodeImage(String barcodeText) throws Exception {
ByteArrayOutputStream stream = QRCode
.from(barcodeText)
.withSize(250, 250)
.stream();
ByteArrayIn public static BufferedImage generateUPCABarcodeImage(String barcodeText) {
UPCABean barcodeGenerator = new UPCABean();
BitmapCanvasProvider canvas = new BitmapCanvasProvider(160, BufferedImage.TYPE_BYTE_BINARY, false, 0);
bar public static BufferedImage generateCode128BarcodeImage(String barcodeText) {
Code128Bean barcodeGenerator = new Code128Bean();
BitmapCanvasProvider canvas = new BitmapCanvasProvider(160, BufferedImage.TYPE_BYTE_BINARY, false, 0);
Community Discussions
Trending Discussions on barcode
QUESTION
Looking for a way to avoid duplication when creating different, flexible FSMs within single application.
I have a concept below, under the heading 0: BEFORE Requirements Change. This concept shows how FSMs of different products can be created, and how an FSM can run. Only one product's FSM can run on a station/computer at any given time, but one station can allow for multiple products (at different times). For context, this is a manufacturing environment, and there are many products which go through a scanning process. Some products have commonalities in their process, like Product A and B (set up batch for product -> scan a part -> apply business logic -> repeat for multiple parts until batch complete, label printed -> set up next batch...). But other products have different processes, like Product C. Products' processes can also require/include/exclude varying components (different devices, databases, business logic); this is all shown under 0: BEFORE Requirements Change.
Now, say the requirements change (which has happened multiple times in the past), and a new step is needed in-between existing steps for multiple products' FSMs (for example, need to trigger a camera and process the image). Furthermore, this additional step might be just a trial phase, and will need to be disabled. I'll now have to go and change every single FSMCreator, as shown under heading 1: AFTER Requirements Change. When there are many products (ALOT more than 3), big process changes like this have been error-prone and difficult to manage.
Is there a better/cleaner way of organizing the architecture or creating the FSMs, so that this duplication is avoided?
The problem stems from how different FSMs can share some common steps, or have some common components, but are not 100% the same. Essentially, there are many different mixing-and-matching variations of components (devices, databases, business logic), states, and transitions. Ultimately, it is the product's process that defines the FSM, so each product needs to know how to create its FSM. This is why I have a different FSMCreator class for each product, to handle the different processes per product. But as shown, this leads to duplication.
0: Before Requirements Change ...ANSWER
Answered 2022-Mar-28 at 07:06You have to always edit your code as your requirements always change. And it looks like you will always have to change your code if you will stick with this approach.
So we've figured out that your workflow always changes. Our goal is to make minimum changes in code.
What we can do? We can move your workfow in storage and based on this data we can run your FSM. This is how Jira workflow works.. They have many users and it would be really hard to edit code per workflow and it is not possible. How they solved their problem? Jira stores workflow like data and they edit data, not code.
This is a rough example, not a complete solution, however it will show the direction of how to write solution that will be fit to open closed principle.
So, you can store your workflow in json file:
QUESTION
So I Have a Zebra MC330M device.
I created earliar an application, and I would like to use the PDA built in barcode scanner.
If is run my app in debug mode, everything working well, I can read the barcodes, but If I create an staged or relase version apk, the barcode reader inactive, so the red light doesn't light if I press the button.
I created a simple,to demonstrate the problem, but you can reproduce the problem if you device has EMDK, else you get an exception. Project
I implemented all of stuff by this tutorial: https://techdocs.zebra.com/emdk-for-android/11-0/tutorial/tutBasicScanningAPI
So I added this into gradle: compileOnly 'com.symbol:emdk:7.6.+'
I added thease two lines to the manfest:
ANSWER
Answered 2022-Jan-31 at 07:47Please add the following to your manifest under the uses-permission tag:
QUESTION
Question in short:
We have a specific png image, where searching the datamatrix codes on a given location with the help of pylibdmtx library. At that specified location (given xmin, ymin, xmax, ymax coordinates in the code), we crop the image, rescale and send to the library to decode. but getting assertion error from dmtxdecodescheme.c, and program halts. we wish to neglect the error (return "?????" if possible), but try/except not working, and no way to escape.
Details:
This kind of error had never happened before, only on this specific png image, and given specific coordinates & SCALER value. Uploaded the image at: https://easyupload.io/3yioro , because i can't upload to stackoverflow due to size constraints (3.1 Mb is over the 2Mb limit) if i crop or convert image to another extension, error doesn't reproduce. this is really a rare and hard to duplicate error.
here is the simplified code, where you search only 1 given location:
...ANSWER
Answered 2022-Mar-01 at 15:19Your code worked as-is for me. I got this output
Initially I had other problems with libdmtx.(This is an issue with libdmtx I faced and has no issue with your Python code)
I installed libdmtx using condas in win10. But during runtime I got FileNotFoundError: Could not find module 'libdmtx-64.dll'
then I built the library from https://github.com/dmtx/libdmtx and got release mode dmtx.dll. renamed this dll to libdmtx-64.dll and placed in `C:\Users\balu\Miniconda3\Library\bin'.
Note: if QR decoding is your goal, check your old questions I have answered.
QUESTION
After upgrading to android 12, the application is not compiling. It shows
"Manifest merger failed with multiple errors, see logs"
Error showing in Merged manifest:
Merging Errors: Error: android:exported needs to be explicitly specified for . Apps targeting Android 12 and higher are required to specify an explicit value for
android:exportedwhen the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. main manifest (this file)
I have set all the activity with android:exported="false". But it is still showing this issue.
My manifest file:
...ANSWER
Answered 2021-Aug-04 at 09:18I'm not sure what you're using to code, but in order to set it in Android Studio, open the manifest of your project and under the "activity" section, put android:exported="true"(or false if that is what you prefer). I have attached an example.
QUESTION
I have printed many barcodes using cl-pdf.
The barcode for "16537" doesn't scan. Others (e.g., "11537") do. I produced them using:
...ANSWER
Answered 2022-Feb-18 at 22:48This is due to an incorrect value in cl-pdf in bar-codes.lisp in *table*. In that table, the Code B character for value 64 is \#' but should be \#`. This causes incorrect codes when encoding a string which contains \#' including if \#' is the check character. For "16537", \#' is the check character.
I put this as an issue here
Update: 2/18/22 Fixed by Marc Battyani
QUESTION
currently, I am struggling with how the MongoDB document system works. I want to fetch array elements with an auto-generated id but how to fetch that specific data that I don't know.
my current schema is
...ANSWER
Answered 2022-Feb-15 at 09:29You can do an aggregation with $project and apply $filter on the array part. In mongoose you can apply the aggregation query in a more or less similar way https://mongoosejs.com/docs/api/aggregate.html
QUESTION
I've come across this problem many times over the years and still live in hope that there is an easy way to do this that I have missed. I work with barcodes a lot. They are usually made of black dots or lines on a white background. Barcode readers generally work faster and more accurately when the edges are crisp and then size of the lines or dots are precise.
Most barcode generation algorithms will give you a compact barcode usually with the smallest element size being one pixel. A typical QR code could fit in a 21 x 21 grid. This would be too small to see if printed pixel to pixel on most printers and would typically be scaled up. The result of scaling it up depends on the method used and although sometimes you are given a choice, often you have no options that make the image suitable. Even printing directly will often give you expected gray artefacts or forms of dithering. The most consistent way I have found is to scale the images before they are use daily in other places such as Microsoft Word, lightburn and a few others I use that still give me a headache.
Below I will go through what I have tried and show the results. I am limiting this to bitmaps only because using vectors here is not something I need on my current project.
My current best resolution is not pretty, it is slow and although I could improve the speed by locking the bits in the bitmap, I am hoping someone has a really simple answer that I had totally missed on my search again this time.
Here is an image of a simple QR code blown up in GIMP.
The problem is, if it is scaled up, it'll often end up looking like this:
Below I created a small test program to go through all the different modes I know of and then generate a matrix of images which I have reproduced below. The version I currently use is Mode 99 which involves inspecting each pixel and drawing a square.
Does anyone have any better ideas?
...ANSWER
Answered 2022-Feb-09 at 19:27You can use a library like ImageTracer.NET to convert the image to a vector image, then it'll scale as big as you need:
QUESTION
I try to add a watermark using itext in pdf. it work without problem using this code :
...ANSWER
Answered 2022-Jan-27 at 15:23You use page.newContentStreamBefore() to add a content stream for your water mark. Thus, when the page is drawn, the watermark is drawn first and the content thereafter over it. For usual text and sparse vector graphics that is good but for full area covering content the watermark may be totally hidden.
Try to use page.newContentStreamAfter() instead. But beware, you may not want to bold the watermark text then anymore, probably even restrict to outline only, as the mark now covers content.
In a question update and a comment you asked how to
make the text transparent.
Transparency usually is achieved by selecting a matching extended graphics state, e.g.:
QUESTION
I have recently upgraded my app from SDK 40 to SDK 44 and came across this error App.js: [BABEL]: Unexpected token '.' (While processing: /Users/user/path/to/project/node_modules/babel-preset-expo/index.js)
Error Stack Trace:
...ANSWER
Answered 2021-Dec-21 at 05:52can you give your
- package.json
- node version
I think that's because of the babel issue / your node version, because it cannot transpile the optional chaining https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining
maybe tried using latest LTS node version? because as far as I know, the latest LTS node version already support optional chaining
QUESTION
I have here a phrase AAC Barcode Description that regex should match.
The problem is sometimes I have underscore, symbols etc... like
- AAC Barcode + Descriptions
- AAC Barcode + Description
- AAC Barcode & Descriptions
- AAC Barcode and Description
REGEX
...ANSWER
Answered 2022-Jan-17 at 00:29You can use
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