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EdgeDetector Method
See Also  Example
Leadtools.Services.ImageProcessing.ServiceContracts Namespace > IEffectsProcessingService Interface : EdgeDetector Method



request
A DataContractAttribute containing the data that will be used in this EdgeDetector operation.
request
A DataContractAttribute containing the data that will be used in this EdgeDetector operation.
Applies the specified edge filter to an image. This command is available in the Document Toolkits.

Syntax

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

Parameters

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

Return Value

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

Example

Visual BasicCopy Code
Public Sub EdgeDetectorExample()
  Dim client As EffectsProcessingServiceClient = New EffectsProcessingServiceClient()
  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 EdgeDetectorRequest = New EdgeDetectorRequest()

  request.ConvertOptions = convertOptions
  request.RegionData = Nothing
  request.Threshold = 60
  request.Filter = EdgeDetectorCommandType.SobelBoth

  Dim response As CommandResponse = client.EdgeDetector(request)
  If Not response.Destination Is Nothing Then
    If TypeOf response.Destination Is RawBinaryData Then
       File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path & "EdgeDetector.bmp", (TryCast(response.Destination, RawBinaryData)).Data)
    End If
  End If

  client.Close()
End Sub
C#Copy Code
public void EdgeDetectorExample() 
{ 
   EffectsProcessingServiceClient client = new EffectsProcessingServiceClient(); 
   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; 
 
   EdgeDetectorRequest request = new EdgeDetectorRequest(); 
 
   request.ConvertOptions = convertOptions; 
   request.RegionData = null; 
   request.Threshold = 60; 
   request.Filter = EdgeDetectorCommandType.SobelBoth; 
 
   CommandResponse response = client.EdgeDetector(request); 
   if (response.Destination != null) 
   { 
      if (response.Destination is RawBinaryData) 
         File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path + "EdgeDetector.bmp", (response.Destination as RawBinaryData).Data); 
   } 
 
   client.Close(); 
}

Remarks

  • Filters such as Sobel filter, Prewitt filter, Laplacian filter, and Gradient filter are used to determine the pixels belonging to edges in the image.
  • The threshold range for the 16, 48, and 64-bit images is from 0 to 65535 and for 12-bit images from 0 to 4095. Otherwise, it is from 0 to 255. The threshold is applied on channels separately.
  • 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.
  • This operation does not support 32-bit grayscale images.
For more information, refer to Detecting and Enhancing Edges and Lines.

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