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
20
votes
2 answers
How to read multiple qr codes from one image using zxing library
I am currently developing a scanner that reads multiple QR codes found in one image.
I manage to read the QR codes in the image but it's giving me inconsistent results. Assuming there are 4 QR codes in the image, sometimes I can read 2 and sometimes…
She Smile GM
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20
votes
8 answers
Google API - URL Shortener with PHP
My code is below. The URL shortening service works, but it doesn't when I insert my $POST. Does anyone know how to fix this my looking at the code?
// This is the URL you want to shorten
$longUrl =…
ItsJoeTurner
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19
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2 answers
Decode Micro QR codes with Python
I used "segno" to create Micro QR codes with python:
import segno
segno.make_micro("1").save("1.png", scale=10)
Output Image
Does anyone know of a (simple) way to decode these with python? I could not find a library but I'm afraid that doning this…
Manu
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19
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1 answer
Working QR code scanner for PhoneGap
I have successfully followed this thread
Phonegap 3.0.0: BarcodeScanner Plugin
But it seems like it cannot scan Qr Code. Here is the screen shot from phone:
I have tried scanning a barcode image and it works fine. But not with QR images.
Any…
fiberOptics
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19
votes
1 answer
Use smartphone camera from a web app to scan QR code
I want to build a web app (Html5 + Javascript, NO flash) than, using the smartphone camera, scan a QR code, and sends the result to a server. Is that posible?
Thanks!
Imaky
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18
votes
2 answers
QR codes - same URL - different image - why?
Why do some QR codes look different when using the same URL?
user684817
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18
votes
4 answers
Scanning QR code using Android's Mobile Vision API
I followed this tutorial on how to build an Android app that can scan QR codes.
Here's the full code. I added the Google Play services using grade like so compile 'com.google.android.gms:play-services:7.8.0'.
AndroidManifest.xml
Isuru
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18
votes
5 answers
How can I generate QR images in Node.js without canvas?
I'm building a website for a client in Node.js and I need to generate QR-codes or Barcodes for the ticket system.
I've found a few modules, but all of them need an install like canvas, one way or another.
I'm on a shared hosting package and my host…
CherryNerd
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18
votes
2 answers
QR code scanning without fullscreen camera
I need to continuously scan QR codes in my Android app while the main View of the app is on the screen. The main view should contain a window with camera preview, but not a fullscreen camera preview.
An example of usage: Main view containing a list…
tomashnilica
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18
votes
2 answers
Set an initial focal distance on iOS
I'm working on an iOS-app where one of the features is scanning QR-codes. For this I'm using the excellent library, ZBar. The scanning works fine and is generally really quick. However when you use smaller QR-codes it takes a bit longer to scan,…
Ryuu Tora
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18
votes
7 answers
how to resize Image in java?
Hello I have a QR code Image , and I want to resize it , when I try to resize it to a small image using this code , I always get a blury image , and the QR code is no longer valid when I scan it , but it works fine when I resize to a big sized…
Walllzzz
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17
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3 answers
How do I encode characters using UTF-8 in a QR code using Zxing project?
Zxing Project is a famous open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages. But I believe there are somebody have the same problem just like me: I can't Encode UTF-8 characters in a…
Coding minion
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17
votes
5 answers
Javascript QR code reading libraries
I wish to use QR codes in a PhoneGap-based mobile app. There are several ways to generate QR codes using javascript. I'm using Jerome Etienne's jquery-based solution.
I'm looking for a pure Javascript solution or a set of PhoneGap plugins for the…
Alec Wenzowski
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17
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5 answers
Secure / Encrypted QR Codes
Is there an application where you can generate encrypted QR Codes?
I havent a lot of literature on encrypting QR codes out there. We are looking to implement something that clients can send us encrypted information and we scanning them on our…
andreas
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4 answers
Delphi QR Code component / generator?
I am desperately looking for a QR Code component to generate QR Code. So far the only method I have found is through Google API chart but I need an offline method.
http://theroadtodelphi.wordpress.com/2010/12/06/generating-qr-codes-with-delphi/
I…
BeachBoy
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