• Leadtools.dll
• Leadtools.Codecs.dll
• Leadtools.Twain.dll
• Leadtools.ImageProcessing.Core.dll
• Leadtools.Forms.dll
• Leadtools.Forms.DocumentWriters.dll
• Leadtools.Forms.Ocr.dll
• Leadtools.Forms.Ocr.Advantage.dll
• Leadtools.Codecs.Bmp.dll
• Leadtools.Codecs.Cmp.dll
• Leadtools.Codecs.Tif.dll
• Leadtools.Codecs.Fax.dll

[C#]

             using Leadtools;
             using Leadtools.Twain;
             using Leadtools.ImageProcessing;
             using Leadtools.ImageProcessing.Core;
             using Leadtools.Forms;
             using Leadtools.Forms.DocumentWriters;
             using Leadtools.Forms.Ocr;
             using Leadtools.ImageProcessing;
             

[Visual Basic]

             Imports Leadtools
             Imports Leadtools.Twain
             Imports Leadtools.ImageProcessing
             Imports Leadtools.ImageProcessing.Core
             Imports Leadtools.Forms
             Imports Leadtools.Forms.DocumentWriters
             Imports Leadtools.Forms.Ocr
             Imports Leadtools.ImageProcessing
             

[C#]

             // The OCR engine instance
             private IOcrEngine _ocrEngine;
             // OCR document instance
             private IOcrDocument _ocrDocument;
             // The Twain session
             private TwainSession _twainSession;
             // The output directory for saving PDF files
             private string _outputDirectory = @"C:\MyImages";
             // The image processing commands we are going to use to clean the scanned image
             private List<RasterCommand> _imageProcessingCommands;
             private int _scanCount;
             

[Visual Basic]

             ' The OCR engine instance
             Private _ocrEngine As IOcrEngine
             ' OCR document instance
             Private _ocrDocument As IOcrDocument
             ' The Twain session
             Private _twainSession As TwainSession
             ' The output directory for saving PDF files
             Private _outputDirectory As String = "C:\MyImages"
             ' The image processing commands we are going to use to clean the scanned image
             Private _imageProcessingCommands As List(Of RasterCommand)
             Private _scanCount As Integer
             

[C#]

             protected override void OnLoad(EventArgs e)
             {
                // Initialize the OCR engine
                _ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false);
                // Startup the engine
                _ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS 19\Bin\Common\OcrAdvantageRuntime");
            
                // Initialize Twain scanning session
                _twainSession = new TwainSession();
                _twainSession.Startup(this.Handle, "My Company", "My Product", "My Version", "My Application", TwainStartupFlags.None);
            
                // Subscribe to the TwainSession.Acquire event to get the image
                _twainSession.AcquirePage += new EventHandler<TwainAcquirePageEventArgs>(_twainSession_AcquirePage);
            
                // Initialize the image processing commands we are going to use
                // Add as many as you like, here we will add Deskew and Despeckle
                _imageProcessingCommands = new List<RasterCommand>();
                _imageProcessingCommands.Add(new DeskewCommand());
                _imageProcessingCommands.Add(new DespeckleCommand());
            
                base.OnLoad(e);
             }
             

[Visual Basic]

             Protected Overrides Sub OnLoad(e As EventArgs)
                ' Initialize the OCR engine
                _ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False)
                ' Startup the engine
                _ocrEngine.Startup(Nothing, Nothing, Nothing, "C:\LEADTOOLS 19\Bin\Common\OcrAdvantageRuntime")
            
                ' Initialize Twain scanning session
                _twainSession = New TwainSession()
                _twainSession.Startup(Me.Handle, "My Company", "My Product", "My Version", "My Application", TwainStartupFlags.None)
            
                ' Subscribe to the TwainSession.Acquire event to get the image
                AddHandler _twainSession.AcquirePage, AddressOf _twainSession_AcquirePage
            
                ' Initialize the image processing commands we are going to use
                ' Add as many as you like, here we will add Deskew and Despeckle
                _imageProcessingCommands = New List(Of RasterCommand)()
                _imageProcessingCommands.Add(New DeskewCommand())
                _imageProcessingCommands.Add(New DespeckleCommand())
            
                MyBase.OnLoad(e)
             End Sub
             

[C#]

             protected override void OnFormClosed(FormClosedEventArgs e)
             {
                // Shutdown and dispose the OCR engine
                _ocrEngine.Dispose();
            
                // And the twain session
                _twainSession.Shutdown();
            
                base.OnFormClosed(e);
             }
             

[Visual Basic]

             Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)
                ' Shutdown and dispose the OCR engine
                _ocrEngine.Dispose()
            
                ' And the twain session
                _twainSession.Shutdown()
            
                MyBase.OnFormClosed(e)
             End Sub
             

[C#]

             private void button1_Click(object sender, EventArgs e)
             {
                // Change the output directory
                using (FolderBrowserDialog dlg = new FolderBrowserDialog())
                {
                   dlg.SelectedPath = _outputDirectory;
                   dlg.ShowNewFolderButton = true;
                   if (dlg.ShowDialog(this) == DialogResult.OK)
                      _outputDirectory = System.IO.Path.GetFullPath(dlg.SelectedPath);
                }
             }
             

[Visual Basic]

             Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button1.Click
                ' Change the output directory
                Using dlg As New FolderBrowserDialog()
                   dlg.SelectedPath = _outputDirectory
                   dlg.ShowNewFolderButton = True
                   If dlg.ShowDialog(Me) = DialogResult.OK Then
                      _outputDirectory = System.IO.Path.GetFullPath(dlg.SelectedPath)
                   End If
                End Using
             End Sub
             

[C#]

             private void button2_Click(object sender, EventArgs e)
             {
                // Select the scanner to use
                _twainSession.SelectSource(null);
             }
             

[Visual Basic]

             Private Sub button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button2.Click
                ' Select the scanner to use
                _twainSession.SelectSource(Nothing)
             End Sub
             

[C#]

             private void button3_Click(object sender, EventArgs e)
             {
                // Create the output directory if it does not exist
                if(!System.IO.Directory.Exists(_outputDirectory))
                   System.IO.Directory.CreateDirectory(_outputDirectory);
            
                // Build the output PDF file name
                string name = "Scanned" + _scanCount;
                _scanCount++;
                string pdfFileName = System.IO.Path.Combine(_outputDirectory, name + ".pdf");
            
                // Create a new file-based OCR document to add the scanned pages to
                _ocrDocument = _ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile);
            
                // Scan the new page(s)
                _twainSession.Acquire(TwainUserInterfaceFlags.Show);
            
                // Save as PDF
                _ocrDocument.Save(pdfFileName, DocumentFormat.Pdf, null);
            
                // Delete the document
                _ocrDocument.Dispose();
            
                // Show the result PDF file
                System.Diagnostics.Process.Start(pdfFileName);
             }
             

[Visual Basic]

             Private Sub button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button3.Click
                ' Create the output directory if it does not exist
                If Not System.IO.Directory.Exists(_outputDirectory) Then
                   System.IO.Directory.CreateDirectory(_outputDirectory)
                End If
            
                ' Build the output PDF file name
                Dim name As String = "Scanned" + _scanCount
                _scanCount = _scanCount + 1
            
                Dim pdfFileName As String = System.IO.Path.Combine(_outputDirectory, name + ".pdf")
            
                ' Create a new file-based OCR document to add the scanned pages to
                _ocrDocument = _ocrEngine.DocumentManager.CreateDocument(Nothing, OcrCreateDocumentOptions.AutoDeleteFile)
            
                ' Scan the new page(s)
                _twainSession.Acquire(TwainUserInterfaceFlags.Show)
            
                ' Save as PDF
                _ocrDocument.Save(pdfFileName, DocumentFormat.Pdf, Nothing)
            
                ' Delete the document
                _ocrDocument.Dispose()
            
                ' Show the result PDF file
                System.Diagnostics.Process.Start(pdfFileName)
             End Sub
             

[C#]

             private void _twainSession_AcquirePage(object sender, TwainAcquirePageEventArgs e)
             {
                // We have a page
                RasterImage image = e.Image;
            
                // First, run the image processing commands on it
                foreach (RasterCommand command in _imageProcessingCommands)
                {
                   command.Run(image);
                }
            
                // Create an OCR page for it
                using (IOcrPage ocrPage = _ocrEngine.CreatePage(image, OcrImageSharingMode.AutoDispose))
                {
                   // Recognize it and add it to the document
                   ocrPage.Recognize(null);
            
                   _ocrDocument.Pages.Add(ocrPage);
                }
             }
             

[Visual Basic]

             Private Sub _twainSession_AcquirePage(sender As Object, e As TwainAcquirePageEventArgs)
                ' We have a page
                Dim image As RasterImage = e.Image
            
                ' First, run the image processing commands on it
                For Each command As RasterCommand In _imageProcessingCommands
                   command.Run(image)
                Next
            
                ' Create an OCR page for it
                Using ocrPage As IOcrPage = _ocrEngine.CreatePage(image, OcrImageSharingMode.AutoDispose)
                   ' Recognize it and add it to the document
                   ocrPage.Recognize(Nothing)
            
                   _ocrDocument.Pages.Add(ocrPage)
                End Using
             End Sub