This example will convert TIF files in a source folder to PDF in a destination folder

Visual Basic

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Public Sub AutoRecognizeExample()    ' Unlock the support needed for LEADTOOLS Plus OCR engine    RasterSupport.Unlock(RasterSupportType.Document, "Replace with your own key here")    RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here")    RasterSupport.Unlock(RasterSupportType.OcrPlusPdfLeadOutput, "Replace with your own key here")    Console.WriteLine("Preparing the source and destination directories...")    Dim sourceDirectory As String = LeadtoolsExamples.Common.ImagesPath.Path    Dim destinationDirectory As String = LeadtoolsExamples.Common.ImagesPath.Path + "Destination"    ' Prepare the directories    If (Directory.Exists(sourceDirectory)) Then       Directory.Delete(sourceDirectory, True)    End If    Directory.CreateDirectory(sourceDirectory)    If (Directory.Exists(destinationDirectory)) Then       Directory.Delete(destinationDirectory, True)    End If    Directory.CreateDirectory(destinationDirectory)    ' Copy some files to the source directory    Dim imagesDirectory As String = LeadtoolsExamples.Common.ImagesPath.Path    For i As Integer = 0 To 3       Dim fileName As String = String.Format("Ocr{0}.tif", i + 1)       Dim sourceFileName As String = Path.Combine(imagesDirectory, fileName)       Dim destinationFileName As String = Path.Combine(sourceDirectory, fileName)       File.Copy(sourceFileName, destinationFileName, True)    Next    Console.WriteLine("Creating an instance of the engine...")    ' Create an instance of the engine    Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, False)       ' Start the engine using default parameters       Console.WriteLine("Starting up the engine...")       ocrEngine.Startup(Nothing, Nothing, Nothing, Nothing)       Dim ocrAutoRecognizeManager As IOcrAutoRecognizeManager = ocrEngine.AutoRecognizeManager       ' Loop through all the TIF files in the source directory, convert to PDF in the destination directory       Dim tifFileNames() As String = Directory.GetFiles(sourceDirectory, "*.tif")       For Each tifFileName As String In tifFileNames          ' Construct the name of the document file          Dim documentFileName As String = Path.Combine(destinationDirectory, Path.GetFileNameWithoutExtension(tifFileName))          documentFileName = Path.ChangeExtension(documentFileName, "pdf")          ' OCR the file          Console.WriteLine("Processing {0}", tifFileName)          ocrAutoRecognizeManager.Run(tifFileName, documentFileName, Nothing, DocumentFormat.Pdf, Nothing)          Console.WriteLine("Saved: {0}", documentFileName)       Next       ' Note: calling Dispose will also automatically shutdown the engine if it has been started       Console.WriteLine("Shutting down...")       ocrEngine.Shutdown()    End Using End Sub

C#

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public void AutoRecognizeExample()  {     // Unlock the support needed for LEADTOOLS Plus OCR engine     RasterSupport.Unlock(RasterSupportType.Document, "Replace with your own key here");     RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here");     RasterSupport.Unlock(RasterSupportType.OcrPlusPdfLeadOutput, "Replace with your own key here");     Console.WriteLine("Preparing the source and destination directories...");       string sourceDirectory = LeadtoolsExamples.Common.ImagesPath.Path;     string destinationDirectory = LeadtoolsExamples.Common.ImagesPath.Path + "Destination";       // Prepare the directories     if(Directory.Exists(sourceDirectory))        Directory.Delete(sourceDirectory, true);     Directory.CreateDirectory(sourceDirectory);       if(Directory.Exists(destinationDirectory))        Directory.Delete(destinationDirectory, true);     Directory.CreateDirectory(destinationDirectory);       // Copy some files to the source directory     string imagesDirectory = LeadtoolsExamples.Common.ImagesPath.Path;       for(int i = 0; i < 4; i++)     {        string fileName = string.Format("Ocr{0}.tif", i + 1);        string sourceFileName = Path.Combine(imagesDirectory, fileName);        string destinationFileName = Path.Combine(sourceDirectory, fileName);        File.Copy(sourceFileName, destinationFileName, true);     }       Console.WriteLine("Creating an instance of the engine...");       // Create an instance of the engine     using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, false))     {        // Start the engine using default parameters        Console.WriteLine("Starting up the engine...");        ocrEngine.Startup(null, null, null, null);          IOcrAutoRecognizeManager ocrAutoRecognizeManager = ocrEngine.AutoRecognizeManager;          // Loop through all the TIF files in the source directory, convert to PDF in the destination directory        string[] tifFileNames = Directory.GetFiles(sourceDirectory, "*.tif");        foreach(string tifFileName in tifFileNames)        {           // Construct the name of the document file           string documentFileName = Path.Combine(destinationDirectory, Path.GetFileNameWithoutExtension(tifFileName));           documentFileName = Path.ChangeExtension(documentFileName, "pdf");             // OCR the file           Console.WriteLine("Processing {0}", tifFileName);           ocrAutoRecognizeManager.Run(tifFileName, documentFileName, null, DocumentFormat.Pdf, null);           Console.WriteLine("Saved: {0}", documentFileName);        }          // Note: calling Dispose will also automatically shutdown the engine if it has been started        Console.WriteLine("Shutting down...");        ocrEngine.Shutdown();     }  }

You can access the instance of the IOcrAutoRecognizeManager used by an IOcrEngine through the IOcrEngine.AutoRecognizeManager property.

The methods of this interface will let you create a document from an image file on disk with optional progress and status monitors.

You can use the Run method to convert in one line of code an image on disk to a final document with any of the document formats supported by this IOcrEngine.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference