OCR Recognition in VB.NET

Here is a detailed VB.NET sample for Optical Character Recognition with RasterEdge .NET Imaging SDK and OCR Add-on. (For C#.NET developers, please go to OCR Recognition for C#.NET. Want to view Image and document in Winforms or Web applications, please go to OCR Recognition in Winforms and Web Document Image OCR Recognition.)

Start Visual Studio .NET (2005 or later version);
Begin a new project with programming language - VB.NET;
Add RasterEdge.DotNetImaging.dll & RasterEdge.DotNetImaging.Ocr.dll to your VB.NET applications;
Add the appropriate Imports directive:

Imports System.IO
Imports RasterEdge.Imaging
Imports RasterEdge.Imaging.Processing
Imports RasterEdge.Imaging.OCR

Bulid a Scannable PDF, PDF/A

Users may build and append RasterEdge Image into the multipage PDF file with following VB.NET codes:

Public Function PdfAddRasterEdgeImageToPdfOCR(ByVal PdfID As Integer, ByVal ImageID As Integer, ByVal Dictionary As 
String, ByVal DictionaryPath As String, CharWhiteList As String) As String

Save as Scannable PDF, PDF/A

If you want to perform OCR recognition and save as scannable PDF, PDF/A and, copy those following VB.NET codes:

Public Function SaveAsPDFOCR(ByVal ImageID As Integer, ByVal PDFStream As Stream, ByVal Dictionary 
As String, ByVal DictionaryPath As String, ByVal CharWhiteList As String, ByVal PDFA As Boolean, ByVal Title As 
String, ByVal Author As String, ByVal Subject As String, ByVal Keywords As String, ByVal Creator As String) As String

Start OCR Recognition

To begin character recognition process, copy those following VB.NET codes:

Public Function OCRTesseractDoOCR(ByVal ImageID As Integer, ByVal Dictionary As String, 
ByVal DictionaryPath As String, ByVal CharWhiteList As String) As String