This example will show the different zone types, recognition modules and fill types supported by the Plus OCR engine.

Visual Basic

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Public Sub ZoneManagerExample()    ' 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)       ' Get the zone manager       Dim ocrZoneManager As IOcrZoneManager = ocrEngine.ZoneManager       ' Show all the zone types supported by this engine       Console.WriteLine("Hit enter to show the supported zone types")       Console.ReadLine()       Dim zoneTypes() As OcrZoneType = ocrZoneManager.GetSupportedZoneTypes()       Console.WriteLine("Supported zone types:")       Console.WriteLine("---------------------")       For Each zoneType As OcrZoneType In zoneTypes          Console.WriteLine(" {0}", zoneType)       Next       Console.WriteLine("Hit enter to show the supported recognition modules")       Console.ReadLine()       Dim recognitionModules() As OcrZoneRecognitionModule = ocrZoneManager.GetSupportedRecognitionModules()       Console.WriteLine("Supported recognition modules:")       Console.WriteLine("---------------------")       For Each recognitionModule As OcrZoneRecognitionModule In recognitionModules          Console.WriteLine(" {0}", recognitionModule)       Next       Console.WriteLine("Hit enter to show the supported fill methods")       Console.ReadLine()       Dim fillMethods() As OcrZoneFillMethod = ocrZoneManager.GetSupportedFillMethods()       Console.WriteLine("Supported fillMethods:")       Console.WriteLine("---------------------")       For Each fillMethod As OcrZoneFillMethod In fillMethods          Console.WriteLine(" {0}", fillMethod)       Next       ' Shutdown the engine       ' Note: calling Dispose will also automatically shutdown the engine if it has been started       ocrEngine.Shutdown()    End Using End Sub

C#

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public void ZoneManagerExample()  {     // 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);          // Get the zone manager        IOcrZoneManager ocrZoneManager = ocrEngine.ZoneManager;          // Show all the zone types supported by this engine        Console.WriteLine("Hit enter to show the supported zone types");        Console.ReadLine();          OcrZoneType[] zoneTypes = ocrZoneManager.GetSupportedZoneTypes();        Console.WriteLine("Supported zone types:");        Console.WriteLine("---------------------");        foreach(OcrZoneType zoneType in zoneTypes)           Console.WriteLine("  {0}", zoneType);          Console.WriteLine("Hit enter to show the supported recognition modules");        Console.ReadLine();          OcrZoneRecognitionModule[] recognitionModules = ocrZoneManager.GetSupportedRecognitionModules();        Console.WriteLine("Supported recognition modules:");        Console.WriteLine("---------------------");        foreach(OcrZoneRecognitionModule recognitionModule in recognitionModules)           Console.WriteLine("  {0}", recognitionModule);          Console.WriteLine("Hit enter to show the supported fill methods");        Console.ReadLine();          OcrZoneFillMethod[] fillMethods = ocrZoneManager.GetSupportedFillMethods();        Console.WriteLine("Supported fillMethods:");        Console.WriteLine("---------------------");        foreach(OcrZoneFillMethod fillMethod in fillMethods)           Console.WriteLine("  {0}", fillMethod);          // Shutdown the engine        // Note: calling Dispose will also automatically shutdown the engine if it has been started        ocrEngine.Shutdown();     }  }

You can access the instance of the IOcrZoneManager used by an IOcrEngine through the IOcrEngine.ZoneManager property.

When calling the IOcrPage.AutoZone method on a page, the generated zone's type (OcrZone.ZoneType), recognition module (OcrZone.RecognitionModule) and fill method (OcrZone.FillMethod) will always be one of the supported values as reported by the IOcrZoneManager.

Before manually changing any of the above zone properties, you must determine whether the particular value is supported by this instance of IOcrEngine. You do this by using the instance of IOcrZoneManager of the engine through the IOcrEngine.ZoneManager property as follows:

• To change the zone type, use IsZoneTypeSupported first.
• To change the recognition module, use IsRecognitionModuleSupported first.
• To change the fill method, use IsFillMethodSupported first.

To get all the supported zone types, recognition modules or fill methods use GetSupportedZoneTypes, GetSupportedRecognitionModules and GetSupportedFillMethods respectively.

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

Reference