Run(RasterImage,PageRequestCallback,Object,List<IMasterFormsCategory>) Method

Automatically recognizes the unknown form then it processes its fields.

Syntax

C#
Visual Basic
Objective-C
Java
C++

public AutoFormsRunResult Run( 
   RasterImage form,
   PageRequestCallback pageRequestCallback,
   object userData,
   List<IMasterFormsCategory> categories
)

'Declaration
 
Public Overloads Function Run( _
   ByVal form As RasterImage, _
   ByVal pageRequestCallback As PageRequestCallback, _
   ByVal userData As Object, _
   ByVal categories As List(Of IMasterFormsCategory) _
) As AutoFormsRunResult

'Usage
 
Dim instance As AutoFormsEngine
Dim form As RasterImage
Dim pageRequestCallback As PageRequestCallback
Dim userData As Object
Dim categories As List(Of IMasterFormsCategory)
Dim value As AutoFormsRunResult
 
value = instance.Run(form, pageRequestCallback, userData, categories)

public:
AutoFormsRunResult^ Run( 
   RasterImage^ form,
   PageRequestCallback^ pageRequestCallback,
   Object^ userData,
   List<IMasterFormsCategory^>^ categories
)

Parameters

form: The unknown form image.
pageRequestCallback: Page request callback if more form images are needed.
userData: The user defined data that is associated with PageRequestCallback.
categories: List of Master Forms categories to use in comparison, pass null or empty to use all Master Forms in the repository.

Return Value

Returns the results of the recognition and processing if the form is recognized, otherwise it returns null. If the Master Form has no processing field, AutoFormsRunResult.FormFields will be null.

Remarks

This method automatically recognizes the unknown form and process its fields at the same time.

If RecognizeFirstPageOnly is true, the recognition will be performed based on the first page only, if it is false the recognition will be performed over all the form pages.

When RecognizeFirstPageOnly is true and the recognition is performed based on the first page only, form should have at least the first page of the form. So during processing, when more pages are required this method will ask for the required pages one page at a time using the pageRequestCallback. The PageRequestCallbackData.FormPageNumber will have the number of the required page and the user returns the requested page image through the PageRequestCallbackData.Page. For example, in the case where multiple forms are fed to the scanner, you scan the first page and pass it to the form, recognize its form by doing the comparison based on the first page, and then after the form is recognized, the engine will ask for the required pages which you then have to scan for further processing.

If the form is not recognized it will return null. If the Master Form of the form type has no field then AutoFormsRunResult.FormFields will be null.

If form has all form pages you can set pageRequestCallback to null.

Example

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Forms.Auto
Imports Leadtools.Forms.Ocr
Imports Leadtools.Forms.Recognition
Imports Leadtools.Forms.Processing
Imports Leadtools.Barcode

Public Codecs As RasterCodecs
Public FormFileName As String
Public Sub MyPageRequestCallback(ByVal data As PageRequestCallbackData)
   data.Page = Codecs.Load(FormFileName, 1, CodecsLoadByteOrder.Bgr, data.FormPageNumber, data.FormPageNumber)
End Sub

Public Sub AutoFormRunAutomatic()

   Dim root As String = Path.Combine(LEAD_VARS.ImagesDir, "Forms\FormsDemo\OCR_Test")

   Dim codecs_Renamed As RasterCodecs = New RasterCodecs()
   'create repository
   Dim repository As DiskMasterFormsRepository = New DiskMasterFormsRepository(codecs_Renamed, root)

   Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False)
      ocrEngine.Startup(Nothing, Nothing, Nothing, LEAD_VARS.OcrAdvantageRuntimeDir)
      Dim engineBarcode As BarcodeEngine = New BarcodeEngine()

      'create AutoForm Engine
      Dim autoEngine As AutoFormsEngine = New AutoFormsEngine(repository, ocrEngine, engineBarcode)
      'set the flag to process the first page only
      autoEngine.RecognizeFirstPageOnly = True
      autoEngine.MinimumConfidenceKnownForm = 40
      'calculate the minimum confidence recognized form according to the correlation between the master forms in the repository
      autoEngine.MinimumConfidenceRecognized = autoEngine.GetMinimumRecognizedConfidenceForm()

      Codecs = codecs_Renamed
      FormFileName = Path.Combine(LEAD_VARS.ImagesDir, "Forms\Images\FCC-107_OCR_Filled.tif")
      'load the first page of the image
      Dim form As RasterImage = codecs_Renamed.Load(FormFileName, 1, CodecsLoadByteOrder.Bgr, 1, 1)
      'recognize and process the form
      Dim result As AutoFormsRunResult = autoEngine.Run(form, AddressOf MyPageRequestCallback, Nothing, Nothing)
      If result Is Nothing Then
         Return
      End If
   End Using
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
Public Const OcrAdvantageRuntimeDir As String = "C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime"
End Class

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Forms.Auto;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.Recognition;
using Leadtools.Forms.Processing;
using Leadtools.Barcode;

public RasterCodecs Codecs;
public string FormFileName;
public void MyPageRequestCallback(PageRequestCallbackData data)
{
   data.Page = Codecs.Load(FormFileName, 1, CodecsLoadByteOrder.Bgr, data.FormPageNumber, data.FormPageNumber);
}

public void AutoFormRunAutomatic()
{
   string root = Path.Combine(LEAD_VARS.ImagesDir, @"Forms\FormsDemo\OCR_Test");
   RasterCodecs codecs = new RasterCodecs();
   //create repository
   DiskMasterFormsRepository repository = new DiskMasterFormsRepository(codecs, root);

   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
   {
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrAdvantageRuntimeDir);
      BarcodeEngine barcodeEngine = new BarcodeEngine();

      //create AutoForm Engine
      AutoFormsEngine autoEngine = new AutoFormsEngine(repository, ocrEngine, barcodeEngine);
      //set the flag to process the first page only
      autoEngine.RecognizeFirstPageOnly = true;
      autoEngine.MinimumConfidenceKnownForm = 40;
      //calculate the minimum confidence recognized form according to the correlation between the master forms in the repository
      autoEngine.MinimumConfidenceRecognized = autoEngine.GetMinimumRecognizedConfidenceForm();

      Codecs = codecs;
      FormFileName = Path.Combine(LEAD_VARS.ImagesDir, @"Forms\Images\FCC-107_OCR_Filled.tif");
      //load the first page of the image
      RasterImage form = codecs.Load(FormFileName, 1, CodecsLoadByteOrder.Bgr, 1, 1);
      //recognize and process the form
      AutoFormsRunResult result = autoEngine.Run(form, MyPageRequestCallback, null, null);
      if (result == null)
         return;
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
public const string OcrAdvantageRuntimeDir = @"C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime";
}

Requirements

Target Platforms

Reference

AutoFormsEngine Class
AutoFormsEngine Members
Overload List