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IOcrLanguageManager Interface
See Also  Members   Example
Leadtools.Forms.Ocr Namespace : IOcrLanguageManager Interface



Provides access to the language environment of the character sets used by the IOcrEngine.

Syntax

Visual Basic (Declaration) 
Public Interface IOcrLanguageManager
Visual Basic (Usage)Copy Code
Dim instance As IOcrLanguageManager
C# 
public interface IOcrLanguageManager
C++/CLI 
public interface class IOcrLanguageManager

Example

This example will enumerate the languages supported by the OCR engine then enable the current culture language plus German.

Visual BasicCopy Code
Public Sub OcrLanguageManagerExample()
   ' 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")
   ' Create an instance of the engine
   Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, False)
      ' Start the engine using default parameters
      ocrEngine.Startup(Nothing, Nothing, Nothing, Nothing)

      ' Show languages supported by this engine
      Dim supportedLanguages() As String = ocrEngine.LanguageManager.GetSupportedLanguages()

      Console.WriteLine("Supported languages:")
      For Each supportedLanguage As String In supportedLanguages
         ' Get the friendly name of this language using the .NET CultureInfo class
         Dim ci As New CultureInfo(supportedLanguage)
         Console.WriteLine(" {0} ({1})", supportedLanguage, ci.EnglishName)
      Next

      ' Check if current culture info language is supported
      Dim currentCulture As CultureInfo = CultureInfo.CurrentCulture
      Dim name As String = currentCulture.TwoLetterISOLanguageName
      Dim supported As Boolean = ocrEngine.LanguageManager.IsLanguageSupported(name)
      If (Not supported) Then
         name = currentCulture.Name
         supported = ocrEngine.LanguageManager.IsLanguageSupported(name)
      End If

      If (supported) Then
         Console.WriteLine("Current culture is {0}, and it is supported by this OCR engine. Enabling only this language and German now", currentCulture.EnglishName)
         ocrEngine.LanguageManager.EnableLanguages(New String() {name, "de"})

         ' If this engine does not support enabling multiple languages (currently the LEADTOOLS Advantage OCR engine), then GetEnabledLanguages
         ' will always return an array of 1, make a note of this
         If Not ocrEngine.LanguageManager.SupportsEnablingMultipleLanguages Then
            Console.WriteLine("This engine supports enabling only one language at a time, so only the first language we enabled will be used")
         End If

         Dim enabledLanguages() As String = ocrEngine.LanguageManager.GetEnabledLanguages()
         Console.WriteLine("Current enabled languages in the engine are:")
         For Each enabledLanguage As String In enabledLanguages
            ' Get the friendly name of this language using the .NET CultureInfo class
            Dim ci As New CultureInfo(enabledLanguage)
            Console.WriteLine(" {0} ({1})", enabledLanguage, ci.EnglishName)
         Next
      Else
         Console.WriteLine("Current culture is {0}, and it is not supported by this OCR engine", currentCulture.EnglishName)
      End If

      ocrEngine.Shutdown()
   End Using
End Sub
C#Copy Code
public void OcrLanguageManagerExample() 
{ 
   // 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"); 
   // Create an instance of the engine 
   using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, false)) 
   { 
      // Start the engine using default parameters 
      ocrEngine.Startup(null, null, null, null); 
 
      // Show languages supported by this engine 
      string[] supportedLanguages = ocrEngine.LanguageManager.GetSupportedLanguages(); 
 
      Console.WriteLine("Supported languages:"); 
      foreach(string supportedLanguage in supportedLanguages) 
      { 
         // Get the friendly name of this language using the .NET CultureInfo class 
         CultureInfo ci = new CultureInfo(supportedLanguage); 
         Console.WriteLine("  {0} ({1})", supportedLanguage, ci.EnglishName); 
      } 
 
      // Check if current culture info language is supported 
      CultureInfo currentCulture = CultureInfo.CurrentCulture; 
      string name = currentCulture.TwoLetterISOLanguageName; 
      bool supported = ocrEngine.LanguageManager.IsLanguageSupported(name); 
      if(!supported) 
      { 
         name = currentCulture.Name; 
         supported = ocrEngine.LanguageManager.IsLanguageSupported(name); 
      } 
 
      if(supported) 
      { 
         Console.WriteLine("Current culture is {0}, and it is supported by this OCR engine. Enabling only this language and German now", currentCulture.EnglishName); 
         ocrEngine.LanguageManager.EnableLanguages(new string[] { name, "de" }); 
 
         // If this engine does not support enabling multiple languages (currently the LEADTOOLS Advantage OCR engine), then GetEnabledLanguages 
         // will always return an array of 1, make a note of this 
         if(!ocrEngine.LanguageManager.SupportsEnablingMultipleLanguages) 
            Console.WriteLine("This engine supports enabling only one language at a time, so only the first language we enabled will be used"); 
 
         string[] enabledLanguages = ocrEngine.LanguageManager.GetEnabledLanguages(); 
         Console.WriteLine("Current enabled languages in the engine are:"); 
         foreach(string enabledLanguage in enabledLanguages) 
         { 
            // Get the friendly name of this language using the .NET CultureInfo class 
            CultureInfo ci = new CultureInfo(enabledLanguage); 
            Console.WriteLine("  {0} ({1})", enabledLanguage, ci.EnglishName); 
         } 
      } 
      else 
         Console.WriteLine("Current culture is {0}, and it is not supported by this OCR engine", currentCulture.EnglishName); 
 
      ocrEngine.Shutdown(); 
   } 
}

Remarks

You can access the instance of the IOcrLanguageManager used by an IOcrEngine through the IOcrEngine.LanguageManager property.

The language environment defines the character set(s) recognized by the OCR engine. For example, if you enable the English and German languages, the German characters (ä, Ä, é, ö, Ö, ü, Ü, ß) will be combined with the English characters to define the set recognized by the engine. The language environment does not perform spell checking however, for that, refer to IOcrSpellCheckManager.

The IOcrLanguageManager allows you to do the following:

The language values used throughout the LEADTOOLS OCR toolkit is a string value based on RFC 4646 (Windows Vista and later). The name could be an ISO 639 two-letter lowercase culture code associated with a language or a combination of ISO 630 and ISO 3166 two-letter uppercase subculture code associated with a country or region.

You must call the IOcrEngine.Startup method before you can use the IOcrEngine.LanguageManager property.

Note: The IOcrLanguageManager state is also saved when the engine settings are saved. For more information, refer to IOcrSettingManager.

Requirements

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

See Also

IOcrLanguageManager requires an OCR module license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features