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DirectionEdgeStatisticalCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.Effects Namespace : DirectionEdgeStatisticalCommand Class



Detects the variation of colors in the specified direction using statistical indices. It is similar to EdgeDetectStatisticalCommand, but this command allows you to specify the direction angle.

Syntax

Visual Basic (Declaration) 
Public Class DirectionEdgeStatisticalCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As DirectionEdgeStatisticalCommand
C# 
public class DirectionEdgeStatisticalCommand : RasterCommand, IRasterCommand 
C++/CLI 
public ref class DirectionEdgeStatisticalCommand : public RasterCommand, IRasterCommand 

Example

Run the DirectionEdgeStatisticalCommand on an image, to find it is edges.

Visual BasicCopy Code
Public Sub DirectionEdgeStatisticalCommandExample()
   RasterCodecs.Startup()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")

   ' Prepare the command
   Dim command As DirectionEdgeStatisticalCommand = New DirectionEdgeStatisticalCommand

   command.Dimension = 15
   command.Threshold = 128
   command.Angle = 4500
   command.EdgeColor = New RasterColor(255, 255, 255)
   command.BackGroundColor = New RasterColor(0, 0, 0)
   'Find the edges in the image.
   command.Run(leadImage)
   codecs.Save(leadImage, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24)


   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void DirectionEdgeStatisticalCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg"); 
 
   // Prepare the command 
   DirectionEdgeStatisticalCommand command = new DirectionEdgeStatisticalCommand(); 
 
   command.Dimension    = 15; 
   command.Threshold    = 128; 
   command.Angle        = 4500; 
   command.EdgeColor       = new RasterColor(255, 255, 255); 
   command.BackGroundColor = new RasterColor(0, 0, 0); 
 
   //Find the edges in the image. 
   command.Run(image); 
   codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24); 
 
   RasterCodecs.Shutdown(); 
}

Remarks

  • The edges are detected by applying a statistical filter that analyzes the variations of colors in a specified direction around each pixel.
  • This command 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 command does not support 32-bit grayscale images.
For more information, refer to Detecting and Enhancing Edges and Lines.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Effects.DirectionEdgeStatisticalCommand

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also