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



request
A DataContractAttribute containing the data that will be used in this Median operation.
request
A DataContractAttribute containing the data that will be used in this Median operation.
Changes the color of each pixel in an image to the median color of pixels in its neighborhood. This is similar to the Average operation, but it is used for noise reduction, rather than a blur effect.

Syntax

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

Parameters

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

Return Value

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

Example

Visual BasicCopy Code
Public Sub MedianExample()
  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 MedianRequest = New MedianRequest()

  request.ConvertOptions = convertOptions
  request.Dimension = 9
  request.RegionData = Nothing

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

  client.Close()
End Sub
C#Copy Code
public void MedianExample() 
{ 
   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; 
 
   MedianRequest request = new MedianRequest(); 
 
   request.ConvertOptions = convertOptions; 
   request.Dimension = 9; 
   request.RegionData = null; 
 
   CommandResponse response = client.Median(request); 
   if (response.Destination != null) 
   { 
      if (response.Destination is RawBinaryData) 
         File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path + "Median.bmp", (response.Destination as RawBinaryData).Data); 
   } 
 
   client.Close(); 
}

Remarks

  • You control the effect by specifying the size of the neighborhood that is used for calculating the median value. For example, for 8x8, set Dimension property(or the dimension parameter of the Constructor)to 8.
  • 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.
  • If the image has a region, this command works only on the region. If the image does not have a region, this command works on the entire image.
  • This operation does not support 32-bit grayscale images.
For more information, refer to Removing Noise.

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