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EdgeDetectorCommand Constructor(int,EdgeDetectorCommandType)

Summary

Initializes a new EdgeDetectorCommand class object with explicit parameters.

Syntax
C#
VB
Objective-C
C++
Java
Public Function New( _ 
   ByVal threshold As Integer, _ 
   ByVal filter As EdgeDetectorCommandType _ 
) 
- (instancetype)initWithThreshold:(NSInteger)threshold 
                           filter:(LTEdgeDetectorCommandType)filter 
public EdgeDetectorCommand( 
   int threshold,  
   EdgeDetectorCommandType filter 
) 
public: 
EdgeDetectorCommand(  
   int threshold, 
   EdgeDetectorCommandType filter 
) 

Parameters

threshold
Threshold value used to determine which pixels are edge pixels. If the difference determined for a pixel is greater than this value, the pixel is an edge pixel. This parameter only accepts positive values.

filter
Flag that indicates which edge detection filter to apply.

Example

Run the EdgeDetectorCommand on an image.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
public void EdgeDetectorConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\NaturalFruits.jpg")); 
 
   // Prepare the command 
   EdgeDetectorCommand command = new EdgeDetectorCommand(60, EdgeDetectorCommandType.Laplace2); 
   // find the edges of the image. 
   command.Run(image); 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
Public Sub EdgeDetectorConstructorExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\NaturalFruits.jpg")) 
 
   ' Prepare the command 
   Dim command As EdgeDetectorCommand 
   command = New EdgeDetectorCommand(60, EdgeDetectorCommandType.Laplace2) 
   ' find the edges of the image. 
   command.Run(leadImage) 
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class 
c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
using Leadtools.Examples; 
 
public void EdgeDetectorConstructorExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   EdgeDetectorCommand command = new EdgeDetectorCommand(60, EdgeDetectorCommandType.Laplace2); 
   // find the edges of the image. 
   command.Run(image); 
   // Save result image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24); 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
Public Sub EdgeDetectorConstructorExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As EdgeDetectorCommand = New EdgeDetectorCommand(60, EdgeDetectorCommandType.Laplace2) 
   ' find the edges of the image. 
   command.Run(image) 
   ' Save result image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24) 
   image.Dispose() 
End Sub 
Requirements

Target Platforms

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Leadtools.ImageProcessing.Effects Assembly