Jul
19
2016

Decode QRCode with ZXing.net + Unity

An article by mgear

Simple example to decode QRCode from texture image.

– Download XZing.net from http://zxingnet.codeplex.com/
– Unzip, Copy zxing.unity.dll from Unity/ folder into your Unity project (create Plugins/ folder and place the dll there)
– Download some QRCode image, like:
– Create new script (see source below)
– Attach script to empty gameobject
– Assign your QRCode texture into inputTexture field
– Hit Play!
– See console output:

  QR_CODE
  goo.gl/BF4kdV

—

Your Project window structure

xzing_unity

—

Source: ReadBarcodeFromFile.cs

	using UnityEngine;
	using System.Collections;
	using ZXing;

	public class ReadBarcodeFromFile : MonoBehaviour
	{
	public Texture2D inputTexture; // Note: [x] Read/Write must be enabled from texture import settings

	void Start()
	{
	// create a barcode reader instance
	IBarcodeReader reader = new BarcodeReader();
	// get texture Color32 array
	var barcodeBitmap = inputTexture.GetPixels32();
	// detect and decode the barcode inside the Color32 array
	var result = reader.Decode(barcodeBitmap, inputTexture.width, inputTexture.height);
	// do something with the result
	if (result != null)
	{
	Debug.Log(result.BarcodeFormat.ToString());
	Debug.Log(result.Text);
	}
	}
	}

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ReadBarcodeFromFile.cs

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Tags: barcode, decode, detect, qrcode, scan, zxing

About the Author:

.fi

12 Comments + Add Comment

PAULO RUBENS WERNECK CASTOR 12/10/2016 at 21:28

opa!! Como faço para usar pegar a imagem da camera?

Reply
- mgear 13/10/2016 at 21:36
  
  I think should work if get webcam texture into texture2D and feed that to the script..
  https://docs.unity3d.com/ScriptReference/WebCamTexture.GetPixels.html
  
  Reply
Error messages with C# in Unity - How to Code .NET 15/05/2017 at 17:01

[…] Hey r/csharp, I’ve been trying to implement a QR code reader into Unity. I am a complete beginner/noob and am very new to both C# and Unity. I have been trying to use this link. […]

Reply
Devesh 15/09/2017 at 01:12

This is nice assets to read and generate qr/bar codes.

https://assetstore.unity.com/packages/tools/integration/qr-code-reader-and-generator-91072

Reply
teapot 28/09/2017 at 18:20

please reload qrcode texture agin ….thankyou

http://vrbox.in/wp-content/uploads/2015/11/QR-Code1.jpg

Reply
- mgear 29/09/2017 at 09:37
  
  i think it was just something like these,
  http://www.hypergridbusiness.com/faq/vr-headset-qr-codes/
  
  Reply
Vinicius 04/05/2018 at 09:07

Thank yoooouu so much! Helped me a lot. Really thanks!!

Reply
mgear 22/05/2018 at 20:39

how to use ZXing in Unity3D
https://github.com/linmq/ZXing_Unity3D_Test

Reply
Paul Jones 12/09/2018 at 16:58

I tried Zxing, yeah, it works. And i prefer to decode qr code in .net with CnetSDK instead: http://www.cnetsdk.com/net-barcode-generator-sdk-create-qrcode-2d-barcode.

Reply
George S. 20/03/2019 at 19:34

Hello, I follow your steps exactly as you show and I get this error when I attach my QR code image to Input_Texture: ” Texture ‘Box_Number_01’ is not readable, the texture memory can not be accessed from scripts. You can make the texture readable in the Texture Import Settings.”

Probably is something I am doing wrong, but I cannot understand what. Thanks

Reply
- mgear 20/03/2019 at 21:35
  
  from that texture import settings, need to set ‘[x] read/write enabled’ or something similar.
  https://docs.unity3d.com/Manual/class-TextureImporter.html
  
  Reply
- gonkas 03/07/2020 at 23:19
  
  You need to tick read write box
  
  Reply