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EdgeDetector Method

Summary

Applies the specified edge filter to an image. This command is available in the Document Toolkits.

Syntax

C++

[OperationContractAttribute("EdgeDetector")] 
[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault,  
   Action="",  
   Name="",  
   Namespace="",  
   ProtectionLevel=ProtectionLevel.None,  
   HasProtectionLevel=false)] 
Leadtools.Services.Imageprocessing.Datacontracts.CommandResponse EdgeDetector(  
   Leadtools.Services.Imageprocessing.Datacontracts.EdgeDetectorRequest request 
)

<OperationContractAttribute("EdgeDetector")> 
<FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault,  
   Action="",  
   Name="",  
   Namespace="",  
   ProtectionLevel=ProtectionLevel.None,  
   HasProtectionLevel=False)> 
Function EdgeDetector( _ 
   ByVal request As Leadtools.Services.Imageprocessing.Datacontracts.EdgeDetectorRequest _ 
) As Leadtools.Services.Imageprocessing.Datacontracts.CommandResponse

[OperationContractAttribute("EdgeDetector")] 
[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault,  
   Action="",  
   Name="",  
   Namespace="",  
   ProtectionLevel=ProtectionLevel.None,  
   HasProtectionLevel=false)] 
Leadtools.Services.Imageprocessing.Datacontracts.CommandResponse^ EdgeDetector(  
   Leadtools.Services.Imageprocessing.Datacontracts.EdgeDetectorRequest^ request 
)

Parameters

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

Return Value

A System.Runtime.Serialization.DataContractAttribute containing the modified image resulting from the EdgeDetector operation.

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.

Example

Imports Leadtools.Services 
Imports Leadtools.Services.datacontracts._2009._01 
Imports Leadtools.Services.raster.datacontracts._2009._01 
Imports Leadtools.Services.ImageProcessing.datacontracts._2009._01 
 
Public Sub EdgeDetectorExample() 
   Dim client As EffectsProcessingServiceClient = New EffectsProcessingServiceClient() 
   Dim sourceBinaryData As RawBinaryData = New RawBinaryData() 
   sourceBinaryData.Data = File.ReadAllBytes(Path.Combine(LEAD_VARS.ImagesDir, "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(Path.Combine(LEAD_VARS.ImagesDir, "EdgeDetector.bmp"), (TryCast(response.Destination, RawBinaryData)).Data) 
      End If 
   End If 
 
   client.Close() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

using Leadtools.Services; 
using leadtools.services.datacontracts._2009._01; 
using leadtools.services.raster.datacontracts._2009._01; 
using leadtools.services.imageprocessing.datacontracts._2009._01; 
 
public void EdgeDetectorExample() 
{ 
   EffectsProcessingServiceClient client = new EffectsProcessingServiceClient(); 
   RawBinaryData sourceBinaryData = new RawBinaryData(); 
   sourceBinaryData.Data = File.ReadAllBytes(Path.Combine(LEAD_VARS.ImagesDir,"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(Path.Combine(LEAD_VARS.ImagesDir,"EdgeDetector.bmp"), (response.Destination as RawBinaryData).Data); 
   } 
 
   client.Close(); 
} 
 
static class LEAD_VARS 
{ 
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}