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



request
A DataContractAttribute containng the data that will be used in this UnsharpMask operation.
request
A DataContractAttribute containng the data that will be used in this UnsharpMask operation.
Sharpens the image by applying the unsharp mask.

Syntax

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

Parameters

request
A DataContractAttribute containng the data that will be used in this UnsharpMask operation.

Return Value

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

Example

Visual BasicCopy Code
Public Sub UnsharpMaskExample()
  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 UnsharpMaskRequest = New UnsharpMaskRequest()
  request.ConvertOptions = convertOptions
  request.RegionData = Nothing
  request.Amount = 200
  request.Radius = 15
  request.Threshold = 50
  request.ColorType = UnsharpMaskCommandColorType.Rgb

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

  client.Close()
End Sub
C#Copy Code
public void UnsharpMaskExample() 
{ 
   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; 
 
   UnsharpMaskRequest request = new UnsharpMaskRequest(); 
   request.ConvertOptions = convertOptions; 
   request.RegionData = null; 
   request.Amount = 200; 
   request.Radius = 15; 
   request.Threshold = 50; 
   request.ColorType = UnsharpMaskCommandColorType.Rgb; 
 
   CommandResponse response = client.UnsharpMask(request); 
   if(response.Destination != null) 
   { 
      if(response.Destination is RawBinaryData) 
         File.WriteAllBytes(LeadtoolsExamples.Common.ImagesPath.Path + "UnsharpMask.bmp", (response.Destination as RawBinaryData).Data); 
   } 
 
   client.Close(); 
}

Remarks

  • This operation is actually considered a sharpening method. It is used to sharpen the image with a minimum of noise. To reduce the noise, it starts by blurring a copy of the original image. The amount of blur depends on Radius. The operation then determines the difference between each pixel's value of the original image and the corresponding pixel's value in the blurred image. If the difference is greater than the threshold value, then the difference between the pixel values is multiplied by the amount value and added to the original pixel value.
  • To increase the thickness of the sharpened edges, increase the radius value.
  • To increase the amount of sharpness, increase the amount value.
  • To reduce the noise and eliminate the small edges or individual pixels that will produce noise in image, increase the threshold value.
  • Using the Yuv color space decreases the processing time.
  • 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