InvertedText Method

'Declaration
 
<OperationContractAttribute("InvertedText")>
<FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=False)>
Function InvertedText( _
   ByVal request As InvertedTextRequest _
) As DocumentResponse

Public Sub InvertedTextExample()
      Dim client As DocumentProcessingServiceClient = New DocumentProcessingServiceClient()
      Dim sourceBinaryData As RawBinaryData = New RawBinaryData()
      sourceBinaryData.Data = File.ReadAllBytes(Path.Combine(LEAD_VARS.ImagesDir, "clean.tif"))

      Dim convertOptions As RasterConvertOptions = New RasterConvertOptions()

      convertOptions.Source = sourceBinaryData
      convertOptions.Destination = Nothing
      convertOptions.Format = RasterImageFormat.Bmp
      convertOptions.FirstPage = 1
      convertOptions.LastPage = 1
      convertOptions.BitsPerPixel = 24
      convertOptions.QualityFactor = 2

      Dim request As InvertedTextRequest = New InvertedTextRequest()

      request.ConvertOptions = convertOptions
      request.RegionData = Nothing
      request.Flags = InvertedTextCommandFlags.UseDpi Or InvertedTextCommandFlags.GetRegion
      request.MinimumInvertWidth = 5000
      request.MinimumInvertHeight = 500
      request.MinimumBlackPercent = 70
      request.MaximumBlackPercent = 95

      Dim response As DocumentResponse = client.InvertedText(request)
      If Not response.Destination Is Nothing Then
         If TypeOf response.Destination Is RawBinaryData Then
            File.WriteAllBytes(Path.Combine(LEAD_VARS.ImagesDir, "InvertedText.bmp"), (TryCast(response.Destination, RawBinaryData)).Data)
         End If
      End If

      If Not response.Region Is Nothing Then
         Dim bitmap As Bitmap = New Bitmap(Path.Combine(LEAD_VARS.ImagesDir, "InvertedText.bmp"))
         Dim graphics As Graphics = graphics.FromImage(bitmap)

         Dim region1 As Region = New Region()
         Dim regionData As RegionData = region1.GetRegionData()
         regionData.Data = response.Region.Data

         Dim region2 As Region = New Region(regionData)

         graphics.FillRegion(Brushes.Red, region2)

         bitmap.Save(Path.Combine(LEAD_VARS.ImagesDir, "InvertedTextRegion.bmp"))

         region2.Dispose()
         region1.Dispose()
         bitmap.Dispose()
         graphics.Dispose()
      End If

      client.Close()
   End Sub

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