barcode | Simple barcode reader – script reading barcode scanner input | Barcode Processing library

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:

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:

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:exported when 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:

I have printed many barcodes using cl-pdf.

The barcode for "16537" doesn't scan. Others (e.g., "11537") do. I produced them using:

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

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?

I try to add a watermark using itext in pdf. it work without problem using this code :

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:

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