LevelsetCommand Class

Summary

Performs semi-automatic segmentation (using the Levelset algorithm) by shrinking or expanding a contour represented by a region to the objects in the image.

Syntax

Objective-C

C++

Java

public class LevelsetCommand : RasterCommand

Public Class LevelsetCommand  
   Inherits RasterCommand

@interface LTLevelsetCommand : LTRasterCommand

public class LevelsetCommand extends RasterCommand

public ref class LevelsetCommand : public RasterCommand

Remarks

If the image has no region this command assumes a rectangular region that covers the image.
The Levelset algorithm finds the best-fitting contour that encapsulates the object.
This function 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 in the Document/Medical Imaging toolkits.
This command supports signed/unsigned images.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void LevelsetCommandExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   //Load an image 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")); 
 
   //Add a region to the image from which to start the level set function. 
   LeadRect region = new LeadRect(200, 200, 100, 50); 
   image.AddRectangleToRegion(null, region, RasterRegionCombineMode.Set); 
 
   //Prepare the command 
   LevelsetCommand command = new LevelsetCommand(); 
 
   command.LambdaIn = 1; 
   command.LambdaOut = 1; 
 
   //Apply 
   command.Run(image); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub LevelsetCommandExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   'Load an image 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")) 
 
   'Prepare the command 
   Dim command As LevelsetCommand = New LevelsetCommand() 
 
   command.LambdaIn = 1 
   command.LambdaOut = 1 
 
   'Apply 
   command.Run(image) 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class