Run(String,String,DocumentFormat,String,OcrProgressCallback) Method

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

void Run( 
   string imageFileName,
   string documentFileName,
   DocumentFormat format,
   string zonesFileName,
   OcrProgressCallback callback
)

'Declaration
 
Overloads Sub Run( _
   ByVal imageFileName As String, _
   ByVal documentFileName As String, _
   ByVal format As DocumentFormat, _
   ByVal zonesFileName As String, _
   ByVal callback As OcrProgressCallback _
)

'Usage
 
Dim instance As IOcrAutoRecognizeManager
Dim imageFileName As String
Dim documentFileName As String
Dim format As DocumentFormat
Dim zonesFileName As String
Dim callback As OcrProgressCallback
 
instance.Run(imageFileName, documentFileName, format, zonesFileName, callback)

void Run( 
   string imageFileName,
   string documentFileName,
   DocumentFormat format,
   string zonesFileName,
   OcrProgressCallback callback
)

function Leadtools.Forms.Ocr.IOcrAutoRecognizeManager.Run(String,String,DocumentFormat,String,OcrProgressCallback)( 
   imageFileName ,
   documentFileName ,
   format ,
   zonesFileName ,
   callback 
)

void Run( 
   String^ imageFileName,
   String^ documentFileName,
   DocumentFormat format,
   String^ zonesFileName,
   OcrProgressCallback^ callback
)

Parameters

imageFileName: The name of the file containing the image.
documentFileName: The name of the result document file.
format: The output document format. If this parameter is DocumentFormat.User, then the document saved using the native engine format set in IOcrDocumentManager.EngineFormat if the engine used supports native formats, otherwise an exception will be thrown.
zonesFileName: Optional name of prepared multi-page zone file. This parameter can be a null (Nothing in Visual Basic) reference.
callback: Optional callback to show operation progress.

This method will perform the following operations:

The JobStarted event is triggered.
Creates one ore more IOcrDocument object to store the pages into. The number of OCR documents created is dependant on MaximumThreadsPerJob. If this value is 0 (maximum CPUs/cores) or is greater than 1 and multiple threads is supported by this engine, then more than one document might be created to participate in the recognition process.
Loops through all the pages in imageFileName and for each page:

The page is added to its document using IOcrPageCollection.AddPage.

If zonesFileName contains a valid multi-page zone file name and has an entry for the current page, then the zones are loaded with IOcrPage.LoadZones(fileName, pageNumber) and applied to the page. If zonesFileName is a null (Nothing in Visual Basic) reference or it does not contain an equivalant page number, auto-decomposing of the page is performed instead with IOcrPage.AutoZone.

IOcrPage.Recognize is called to get the OCR data of the page.

If multiple documents are used or current number of recognized pages is greater than the maximum specified in MaximumPagesBeforeLtd, then current recognition data is saved to a temporary LTD file and the OCR document is cleared.
When all pages are processed their saved to result file name specified in documentFileName using the format specified in format. If LTD was used, the temporary file is converted to the final document using DocumentWriter.Convert and optionally DocumentWriter.AppendLtd.
All OCR documents and temporary files are deleted.
The JobCompleted event is triggered.
You can use the JobProgress event or callback to show the operation progress or to abort it if threading is not used. For more information and an example, refer to OcrProgressCallback.
You can use the JobOperation event to get information regarding the current operation being performed. For more information and an example, refer to JobOperation.

The IOcrAutoRecognizeManager interface also has the following options to use with this method:

Option	Description
MaximumPagesBeforeLtd	Add support for converting a document with unlimited number of pages. An OCR recognition operation on a document that contains a large amount of pages (10 and more) might result in an out of memory error. All of the LEADTOOLS OCR engines supports saving the intermediate recognition results to a temporary LTD file (DocumentFormat.LTD). The result of subsequent pages will be appended to this temporary file. When all the pages of the document have been recognized, the engine will convert the temporary LTD file to the desired output format. The MaximumPagesBeforeLtd property defines the maximum number of pages processed as a whole. For example, if the original document has 20 pages and the value of this property is 8, the engine will recognize the first 8 pages and saves the result to a temporary file, recognizes the second 8 pages and append the results, and finally, recognize the last 4 pages and convert the temporary document into the final format.
PreprocessPageCommands	Holds an array of OcrAutoPreprocessPageCommand items to control what auto-preprocess operation to perform on each page document prior to recognition.
MaximumThreadsPerJob	Maximum number of threads to use per job. You can instruct IOcrAutoRecognizeManager to use all available machine CPUs/cores when recognizing a document. This will greatly reduce the time required to finish the OCR operation.
JobErrorMode	Ability to resume on none critical errors. For example, if a source document has a page that could not be recognized. The offending page will be added to the final document as a graphics images and recognition will continue to the next page.
JobStarted, JobProgress, JobOperation and JobCompleted events	Events to track when both synchronous and asynchronous jobs has started, being run and completed.
AbortAllJobs	Aborts all running and pending jobs.
EnableTrace	Output debug messages to the standard .NET trace listeners.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Private Shared Sub OcrAutoRecognizeManagerRun2Example()
      Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")
      Dim pdfFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.pdf")
      ' Create an instance of the engine
      Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Professional, 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

         ' Recognize the document
         ocrAutoRecognizeManager.Run(tifFileName, pdfFileName, DocumentFormat.Pdf, Nothing, Nothing)
      End Using
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

private static void OcrAutoRecognizeManagerRun2Example()
   {
      string tifFileName = Path.Combine(LEAD_VARS.ImagesDir,"Ocr1.tif");
      string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir,"Ocr1.pdf");
      // Create an instance of the engine
      using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Professional, false))
      {
         // Start the engine using default parameters
         Console.WriteLine("Starting up the engine...");
         ocrEngine.Startup(null, null, null, null);

         IOcrAutoRecognizeManager ocrAutoRecognizeManager = ocrEngine.AutoRecognizeManager;

         // Recognize the document
         ocrAutoRecognizeManager.Run(tifFileName, pdfFileName, DocumentFormat.Pdf, null, null);
      }
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

IOcrAutoRecognizeManager Interface
IOcrAutoRecognizeManager Members
Overload List
Programming with the LEADTOOLS .NET OCR
Multi-Threading with LEADTOOLS OCR
LEADTOOLS OCR Thunk Server