How to use Apose.Barcode to recognize an image to text?


Would you provide me a full demo how to recognize an QRCode- image to text based on



We don’t provide VB.NET demos, we only provide standalone C# demos @ github repos. and Aspose.BarCode documentation. Anyways, see the VB.NET code segment on how to recognize QR code and extract code text and code type attributes.
Sample code:

Dim path = "g:\test2\"
'recognize image
Using read As BarCodeReader = New BarCodeReader($"{path}barcode_new.png", DecodeType.QR)
     For Each result As BarCodeResult In read.ReadBarCodes()
End Using

Hope, this is helps a bit.


And a new issue appear is that some QR Image fail to be sucessfully recognized. Please investiage and fix it.

QR1.jpg (89.3 KB)

QR2.jpg (101.5 KB)

MiniAPp.jpg (23.3 KB)


We will be looking into your issue soon. But apparently, it seems, your barcode images are relevant to QR Art barcodes and its recognition is non-standard. We need to improve recognition for QR Art barcodes, but it might take sometime.


I did test your scenario/case using your QR codes (images) and it works fine with latest versions of the API(e.g., Aspose.BarCode for .NET v23.12/ 24.1). Aspose.BarCode correctly detects the QR barcodes (code text, code type, etc.) from your attached images. So, kindly try newer versions of the library.
I am using the following C# code with your both QR barcode images:
Sample code:

var bmp1 = "g:\\test2\\QQ名片.jpg";
//var bmp1 = "g:\\test2\\微信名片.jpg";
using (Aspose.BarCode.BarCodeRecognition.BarCodeReader reader1 = new Aspose.BarCode.BarCodeRecognition.BarCodeReader(bmp1, Aspose.BarCode.BarCodeRecognition.DecodeType.QR))
   reader1.QualitySettings = Aspose.BarCode.BarCodeRecognition.QualitySettings.MaxBarCodes; 

    foreach (Aspose.BarCode.BarCodeRecognition.BarCodeResult result1 in reader1.ReadBarCodes())
        // Read symbology type and code text
        Console.WriteLine("Symbology Type: " + result1.CodeType);
        Console.WriteLine("CodeText: " + result1.CodeText);


Symbology Type: QR

Let us know with exact sample code and barcode images if you find any issue.

They are QR Art barcodes, not standard QR Image, however, Using cell-phone’s scanning those QR Image, they can be recognized!


Please check my previous reply as Aspose.BarCode also detects both QR code images.

I Try the version 24.01, it still fails to recognize the second and the third one, only the first QRCode image can be done!


Third one may not be detected being QR Art barcodes until we enhance the APIs.

First two barcodes are detected. Please specify the quality settings to detect the second one:
reader1.QualitySettings = Aspose.BarCode.BarCodeRecognition.QualitySettings.MaxBarCodes

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): BARCODENET-38909

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.