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PredefinedSpatial Method
See Also  Example
Leadtools.Services.ImageProcessing.ServiceContracts Namespace > IFiltersProcessingService Interface : PredefinedSpatial Method



request
A DataContractAttribute containing the data that will be used in this PredefinedSpatial operation.
request
A DataContractAttribute containing the data that will be used in this PredefinedSpatial operation.
Imposes a predefined spatial filter on an image. This operation is available in the Document/Medical Toolkits.

Syntax

Visual Basic (Declaration) 
<FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   HasProtectionLevel=False)>
<OperationContractAttribute("PredefinedSpatial")>
Overridable Function PredefinedSpatial( _
   ByVal request As PredefinedSpatialRequest _
) As CommandResponse
Visual Basic (Usage)Copy Code
Dim instance As IFiltersProcessingService
Dim request As PredefinedSpatialRequest
Dim value As CommandResponse
 
value = instance.PredefinedSpatial(request)
C# 
[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   HasProtectionLevel=false)]
[OperationContractAttribute("PredefinedSpatial")]
virtual CommandResponse PredefinedSpatial( 
   PredefinedSpatialRequest request
)
C++/CLI 
[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   HasProtectionLevel=false)]
[OperationContractAttribute("PredefinedSpatial")]
virtual CommandResponse PredefinedSpatial( 
   PredefinedSpatialRequest request
)

Parameters

request
A DataContractAttribute containing the data that will be used in this PredefinedSpatial operation.

Return Value

A DataContractAttribute containing the modified image resulting from the PredefinedSpatial operation.

Example

Visual BasicCopy Code
Public Sub PredefinedSpatialExample()
  Dim client As FiltersProcessingServiceClient = New FiltersProcessingServiceClient()
  Dim sourceBinaryData As RawBinaryData = New RawBinaryData()
  sourceBinaryData.Data = File.ReadAllBytes(LeadtoolsExamples.Common.ImagesPath.Path & "image1.cmp")

  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 PredefinedSpatialRequest = New PredefinedSpatialRequest()

  request.ConvertOptions = convertOptions
  request.RegionData = Nothing
  request.Predefined = SpatialFilterCommandPredefined.EmbossNorth
  Dim response As CommandResponse = client.PredefinedSpatial(request)

  If Not response.Destination Is Nothing Then
    If TypeOf response.Destination Is RawBinaryData Then
       File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path & "PredefinedSpatial.bmp", (TryCast(response.Destination, RawBinaryData)).Data)
    End If
  End If

  client.Close()
End Sub
C#Copy Code
public void PredefinedSpatialExample() 
{ 
   FiltersProcessingServiceClient client = new FiltersProcessingServiceClient(); 
   RawBinaryData sourceBinaryData = new RawBinaryData(); 
   sourceBinaryData.Data = File.ReadAllBytes(LeadtoolsExamples.Common.ImagesPath.Path + "image1.cmp"); 
 
   RasterConvertOptions convertOptions = new RasterConvertOptions(); 
 
   convertOptions.Source = sourceBinaryData; 
   convertOptions.Destination = null; 
   convertOptions.Format = RasterImageFormat.Bmp; 
   convertOptions.FirstPage = 1; 
   convertOptions.LastPage = 1; 
   convertOptions.BitsPerPixel = 24; 
   convertOptions.QualityFactor = 2; 
 
   PredefinedSpatialRequest request = new PredefinedSpatialRequest(); 
 
   request.ConvertOptions = convertOptions; 
   request.RegionData = null; 
   request.Predefined = SpatialFilterCommandPredefined.EmbossNorth; 
   CommandResponse response = client.PredefinedSpatial(request); 
 
   if (response.Destination != null) 
   { 
      if (response.Destination is RawBinaryData) 
         File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path + "PredefinedSpatial.bmp", (response.Destination as RawBinaryData).Data); 
   } 
 
   client.Close(); 
}

Remarks

  • A spatial filter recomputes the brightness of each pixel in an image by using a weighted averaging technique that considers the surrounding pixels. Spatial filters are used for operations such as sharpening an image or detecting edges within the image.
  • The PredefinedSpatial operation works best with 24-bit, 16-bit, or grayscale images. If the image uses a color palette, this command matches the new brightness value of each pixel to the nearest color in the existing palette.
  • This operation supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
  • It is beyond the scope of this documentation to explain how applying various weighting factors affects an image. If you specify your own filter, you should refer to a textbook on image processing. For example, Digital Image Processing: Principles and Applications, by Gregory A. Baxes.
  • This operation does not support 32-bit grayscale images.
For more information, refer to Detecting and Enhancing Edges and Lines.
For more information, refer to List of Spatial Filters.

Requirements

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

See Also

Applications developed with LEADTOOLS WCF components require runtime licenses. Server licensing is required for applications on a server. For more information, refer to: Imaging Pro/Document/Medical Features