qr-code-reader | Simple PHP QR Code Reader / Decoder | QRCode Processing library
kandi X-RAY | qr-code-reader Summary
kandi X-RAY | qr-code-reader Summary
This is a PHP library to detect and decode QR-codes. This is QR code reader that works without extensions. This library supports PSR-4. Based on QR code decoder / reader for PHP Ported from ZXing library.
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Top functions reviewed by kandi - BETA
- Builds an array of ECB versions
- Perform cross check on diagonal state
- Calculates the black points .
- Extracts pure bits
- Color luminance source
- Finds the black modules in this frame
- Returns an array of DataBlocks objects for a given version .
- Gets the RGB luminance source .
- Process finder pattern info
- Read codewords .
qr-code-reader Key Features
qr-code-reader Examples and Code Snippets
Community Discussions
Trending Discussions on qr-code-reader
QUESTION
I'm trying to leverage ZXing in an Android app to scan data matrixes. So far I'm successful with printed data matrixes such as this:
But other data matrixes printed by laser or punched have circle-looking marks instead of square-looking ones.
These present a problem. The only app I've found capable of scanning this is QRDroid. This article says that QRDroid uses ZXing so I'm thinking if they can, there must be a way. Unfortunately QRDroid is not an open source project so I don't know how.
There's the possibility of course that QRDroid is using an algorithm to somehow transform the circled marks in to squared ones before they attempt to read the data matrix. I don't know anything about image manipulation in Java, so I can't imagine how this is done.
My question is whether there's a way to tweak ZXing to read this type of data matrix, or if there's any library I can use to manipulate the image to make it readable by ZXing.
Edit:
If I use an image editor -e.g. I used https://www.befunky.com- to and apply a blur of 10, then it looks like a normal printed data matrix and my scan works. How should I go about doing this in my Android app?
...ANSWER
Answered 2018-Aug-16 at 08:28After some research I found out that this type of marking is not really considered a standard data matrix but rather referred to by the manufacturing industry as a DPM, which stands for "Direct Part Marking", although I've read other sources call it "Dot Peen Marking" or "Dot Peen Matrix"
I posted this same question on an already existing issue in the Zxing repository and this was the reply I got:
The problem is the
WhiteRectDetector. It finds a white rectangle inside the code, similar to this issue. If you rotate the image slightly (say 10°) or you blur it as you did or you did a suitably sized pixel dilation followed by an erosion, you'll get something that should (mostly) be detectable.
Modifying the WhiteRectDetector, to allow for dots rather than squares was not really an option for me due to deadlines, so I ended up switching from Zxing to Scandit, which is proven to be able to scan this.
Scandit is a proprietary library, but I haven't really found any other alternatives. You can get a trial license though. For those wanting to try it out to scan DPM's, the documentation is not very clear on how to enable scans for this symbology, so here's the trick.
In Android:
QUESTION
i'm having a problem on making my code to adjust to my web server, because of the security purposes, all inline javascript code to my html is not allowed.
everything is already okay i'm just having a hard time converting my other code to pure javascript
Here is my existing code,,,
...ANSWER
Answered 2019-Sep-25 at 13:24The event listener you are using is faulty, instead of listenning to 'onchange' you have to listen to 'change' like so:
document.querySelector("#openQRCamera").addEventListener('change', () => {
//remove the node as parameter and get it with javascript:
var node = document.getElementById('openQRCamera'); ..
QUESTION
I am trying to create a mobile app where the user will scan a unique QR code, the program should then perform a check to make sure that the correct QR code was scanned (instead of just a random QR code) and if the correct code QR was scanned the API should be called. I found a javascript qr scanner that works on mobile phones from https://www.sitepoint.com/create-qr-code-reader-mobile-website/. This all works perfectly in that it accesses the devices camera and scans a QR code but I am struggling on how to perform a check that the correct QR code was scanned. For the sake of testing the "correct" QR code just translates to a string "hello".
I have tried using alert(res) to find the point where the QR is decoded. When I try to use an if statement to compare the decoded QR to a variable equivalent to "hello", the QR scanner just stops working.
The full code can be seen at https://www.sitepoint.com/create-qr-code-reader-mobile-website/
Here is the part which decodes the QR image.
...ANSWER
Answered 2019-Apr-18 at 11:24Using the above link from sitepoint.com and following the tutorial I didn't run into any issues with the returned response. Try checking if it works like this:
QUESTION
I'm trying to write an app with an integrated barcode scanner. I followed this tutorial: https://www.c-sharpcorner.com/article/xamarin-android-qr-code-reader-by-mobile-camera/
The scan works fine and very fast (before I used ZXing.Net.Mobile and it is horrible slow). Now I need some help to integrate that the app only detects one barcode when the user presses a button and not the whole time. Maybe a delay would solve the problem too.
...ANSWER
Answered 2019-Mar-28 at 13:12You need add this after scan process triggered. "-" operator must be added to prevent non-stop working.You plugged-in event in this line
QUESTION
I am learning how this package works but having issues just getting it to build.
I grabbed ZXing reader from here ==> https://github.com/zxing/zxing
I also went to this site for a guide ==> https://www.callicoder.com/qr-code-reader-scanner-in-java-using-zxing/
So i opened up the pom.xml and i get all the modules .github, .idea, android, android-core, android-integration, core, docs, javase, src, zxing.appspot.com and zxingorg.
I then go to zxingorg/src/main/java/com.google.zxing.web and same for core module pasted qrcodereader in there and tried running it and i get this error.
"Error:Android Pre Dex: [android] Android SDK is not specified"
Now i do get an error saying android sdk needed api level 22 but....im not even developing for android. I was just planning on working just for pc/raspberry pi applications. Not android.
I was under the presumption that the ZXing library was usable for desktop applications and the like??
I am using IntelliJ.
...ANSWER
Answered 2018-Jan-06 at 19:26https://github.com/callicoder/qr-code-generator-and-reader
this was the answer. i was importing all of it and it was using the wrong version and it was android modules attached.
i imported the above and worked like a charm. Please close this.
QUESTION
So I have just taken over an iOS project as their first in-house dev, where previously this app had been developed by an agency.
One of the features of the app is that it needs to scan QR codes—by the look of the code the previous developers have followed this tutorial on AppCoda to implement the QR scan. Everything looks fine and I can't see anything wrong with the code yet it isn't working.
I also downloaded the completed tutorial project and that worked when I tried the QR scan. I also tried copying and pasting every single line so that it was identical to the working tutorial yet no luck.
I'm tearing my hair out trying to figure out why it isn't working.
Any help is much appreciated!
...ANSWER
Answered 2017-Oct-05 at 08:39You're not connecting your class to AVCaptureMetadataOutput's delegate, that's why the AVCaptureMetadataOutputObjectsDelegate functions are not being invoked. More info: https://developer.apple.com/documentation/avfoundation/avcapturemetadataoutputobjectsdelegate
Try this:
QUESTION
I am using the QR code reader code from AppCoda (http://www.appcoda.com/qr-code-reader-swift/#comments) and converted it to Swift 3. The base code works perfectly fine.
However, what I want to achieve is to retrieve a String from the QR reader, store it in a variable, and pass the variable to a following view controller. So I added a bit of code to it to get the following:
...ANSWER
Answered 2017-Mar-03 at 07:29I've just solved the same problem. You have to create an unwind to the previous view.
To do this in the interface builder, you have to ctrl-drag from the controller to the exit in the controller you're actually in (not the one you want to unwind).
Once you have done this, you have to set an identifier to this unwind segue (in your case "showMenu". To do this, you have to the unwind segue from the scenes menu on the left part and set the identifier name on the Attributes inspector.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
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Install qr-code-reader
PHP requires the Visual C runtime (CRT). The Microsoft Visual C++ Redistributable for Visual Studio 2019 is suitable for all these PHP versions, see visualstudio.microsoft.com. You MUST download the x86 CRT for PHP x86 builds and the x64 CRT for PHP x64 builds. The CRT installer supports the /quiet and /norestart command-line switches, so you can also script it.
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