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VB.NET Imaging - QR Code Barcode Scanning

VB.NET Solution to Read & Decode QR Code Barcode from Document & Image

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QR Code Reader for VB.NET Imaging Application
How to detect and read 2d QR Code barcode from source document image file using VB.NET programming code? To help VB.NET developers solve this problem, RasterEdge designs this powerful and multi-functional barcode reading and scanning SDK. Using this VB.NET QR Code barcode reader & scanner add-on, developers can easily and quickly extract, read and decode the information of QR Code that is embedded in certain image or scanned document file.
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Why do we need this VB.NET QR Code barcode reading control add-on? Actually, this VB.NET QR Code barcode decoder SDK has huge practical values, which can be used in multiple types of .NET applications, like desktop application, Windows Forms project and ASP.NET web application. Here we just mention its usage in VB.NET document indexing application. Using this professional 2d QR Code barcode scanner SDK, developers can easily separate a multi-page TIFF (other supported document files are Word & PDF) into several smaller TIFF files by detecting the position of QR Code barcode.
To help you have a deeper and more comprehensive grasp of this VB.NET QR Code barcode recognition plug-in, we divide this online tutorial page into following sections.
  • Key feature list of this VB.NET QR Code barcode reader control
  • Overview of VB.NET QR Code barcode scanner SDK for .NET imaging application
  • Sample VB.NET code to decode QR Code from image format
  • VB.NET demo code to scan QR Code from PDF document file
  • VB.NET programming example to recognize QR Code from Word
VB.NET QR Code Barcode Decoder SDK Features
  • Fully featured QR Code barcode detecting control SDK that is developed from .NET platform
  • Offer easy to use QR Code barcode scanning API for Visual Basic programming language
  • Automatically recognize QR Code barcode type, decode it and return the scanning value to string value
  • Support QR Code barcode recognition from raster image file formats, like PNG, JPEG, BMP, GIF and TIFF, by VB.NET code
  • Able to read all QR Code barcode images from specified area of target PDF or Word document file using VB.NET
VB.NET QR Code Barcode Scanner SDK DLLs
To successfully read QR Code from document image file using VB.NET code, developers have to install following two compact dlls, namely, RasterEdge.Imaging.Basic.dll, RasterEdge.Imaging.Barcode.Scanner.dll. If you want to decode QR Code from PDF or Word file, you have to add RasterEdge.Imaging.PDF.dll or RasterEdge.Imaging.MSWordDocx.dll to your VB.NET class application.
This QR Code barcode scanner add-on, if coupled with other controls of RasterEdge DocImage SDK for .NET, can be also used to view, annotate and process document image files using VB.NET class application.
QR Code Barcode Reading from Image in VB.NET
This VB.NET QR Code barcode scanner component allows developers to scan and decode QR Code barcode from image file (Supported image formats are jpeg, png, gif, bmp and tiff). Here we will take the QR Code barcode recognition from TIFF file as a case to explain.
Public Shared FolderName As String = "c:/"

Private Sub button1_Click(sender As Object, e As EventArgs)
Dim fileName As String = FolderName & "SampleBarcode.tif"

Dim datas As String() = BarcodeScanner.Scan(fileName, BarcodeType.QRCode)

For Each data As String In datas
Debug.WriteLine(data)
Next
End Sub
QR Code Recognition from PDF Using VB.NET
From following VB.NET demo code below, you will know how to get one page from source PDF file and decode all QR Code barcode images from this selected PDF page. Besides, as this VB.NET QR Code barcode reader SDK uses the application of X & Y location, developers are also allowed to detect & decode QR Code from defined area of target PDF document page.
Public Shared FolderName As String = "c:/"

Private Sub button1_Click(sender As Object, e As EventArgs)
Dim fileName As String = FolderName & "Sample.pdf"

Dim reImage As REImage = DirectCast(REFile.OpenDocumentFile(fileName, New PDFDecoder()).GetPage(0).ToImage(), REImage)

Dim datas As String() = BarcodeScanner.Scan(reImage, BarcodeType.QRCode)

For Each data As String In datas
Debug.WriteLine(data)
Next
End Sub
QR Code Scanning from Word Using VB.NET
The VB.NET class demo code below is used to illustrate how to detect & decode all QR Code barcode images from target Word document page and how to return extracted QR Code barcode information to data string. Apart from this DOCX Word document page, this VB.NET QR Code barcode reader SDK can be also used to decode QR Code from DOC Word file page.
Public Shared FolderName As String = "c:/"

Private Sub button1_Click(sender As Object, e As EventArgs)
Dim fileName As String = FolderName & "Sample.docx"

Dim reImage As REImage = DirectCast(REFile.OpenDocumentFile(fileName, New DOCXDecoder()).GetPage(0).ToImage(), REImage)

Dim datas As String() = BarcodeScanner.Scan(reImage, BarcodeType.QRCode)

For Each data As String In datas
Debug.WriteLine(data)
Next
End Sub


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