QR code is an ISO-standardized two-dimensional barcode format.
Here is a sample QR-Code, pointing to Tag wiki qr-code
A Qr-code decoder has many specific patterns to recognize how to read the QR-code
Eyes
Alignment
Timing
Questions tagged [qr-code]
4148 questions
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"Error: Program type already present: com.google.zxing.aztec.detector.Detector"
I'm a newbie programmer working on a research project with Android Studio. My research involves the scanning and generating of QR codes which I used Zxing for. I've just finished the code in generating the QR code but then when I ran it this…
Wink
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0 answers
Input type does not work if camera is open in instascan
I am new to instascan. When I checked the scan by QRCode, everything works fine. But if I try to switch to manual, it does not work. It seems the input type is disabled, but the reset button work fine.
My code is:
let scanner = new…
Ruping Wen
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- 1
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1 answer
How to start QR scanner immediately upon starting the application?
My code for QR code scanning is given below:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
//View objects
buttonScan =…
Vijayachandran Chettiar
- 69
- 11
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1 answer
Unsupported type found - use -availableMetadataObjectTypes' issue
I am trying to create QR Reader. However, when I open the window with scanner, it crashes with error "Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVCaptureMetadataOutput setMetadataObjectTypes:] Unsupported…
mypersonalaccount
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2 answers
How to use Segno to generate a QR code on the fly in python
How can I use the Segno qrcode python library to generate a QR Code on the fly to show it on a web page.
For example, exporting it as an SVG:
import segno
qr = segno.make('Up Jumped the Devil')
svgvar = qr.export_as_svg()
Is there a better way?
qnx Smith
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- 2
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0 answers
How to all qr codes which are in images and save in android
I need to get all Qr code from user image (the image having QR Code in it) and have to show in list (also need to read that code and need to save as image )
(i have image which is having qr codes so, i need detect those qr codes from that image and…
Latha
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Java: Decoding QR-Codes with Zxing fails
I am struggling with the Google’s Zxing Java library. I try to parse several QR-Codes, and it work great for some of them. Other are not recognized, and I can’t tell why.
Here is what I’ve got so far.
Pom.xml
…
Jonas_Hess
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App building: cordova-plugin-qrscanner does not allow Phonegap build
I am trying to develop a new app via Phonegap which includes the "cordova-plugin-qrscanner" plugin. In the config.xml I have the following;
S_NoBEl
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Is there a way to embed logic in a QR code?
I have a requirement where I need to generate a QR code which, when scanned, displays the following behaviour.
When scanned for the first time, if my ios/android app is not installed then it takes the user to the appstore to prompt them to install…
A j
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Google Mobile Vision Barcode location on screen
I am writing an AR Android application in which I scan QR codes (using the Google Mobile Vision Barcode API) as a trigger and then render objects into the camera view.
As there may be more than one QR code at the same time, I want to access the…
高博衍
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1 answer
TCPDF - Problem with Alphanumerical characters (wrong size)
I have a size problem when using TCPDF to generate QR code with only ALPHANUMERICAL characters. My objective: generate the longest URL (with a random part), but keeping the QR code at its lowest size, i.e. 21x21 modules (version1).
Documentation…
Marc Benington
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2 answers
Adding QRcode reading functionality to a native iPhone app
Can anyone point me in the right direction for information or tutorials for adding a QRcode reader to a native iPhone app?
Thanks in advance.
swudev
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0 answers
In Chrome how to open camera in iOS
We have a mobile web app based on Angular 5 need to open camera to capture a qr code.
In Safari is fine, however, we cannot do it with Chrome and Firefox.
Thanks.
Tran Vu Viet Anh
- 11
- 5
1
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1 answer
Printing UTF-8 QR-Codes shows special characters for Umlauts
I am trying to use List & Label in my C# application to output a QR code in UTF-8 encoding. This is exactly what my customer needs.
Unfortunately, the customer's scanner only displays special characters. I can't find an option to set the charset for…
Dieter M.
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- 5
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3 answers
Accessing a users contacts from a webpage
Is it possible to access a mobile users phone contacts from a web page? The company I work for would like to use QR codes to direct people to a coupon on their website and then give viewers the option of sending the url to their friends in a text…
Leslie Mathis
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