LevelsetCommand Class

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

Object Model

Syntax

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public class LevelsetCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration

Public Class LevelsetCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage

Dim instance As LevelsetCommand

public sealed class LevelsetCommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTLevelsetCommand : LTRasterCommand

public class LevelsetCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.LevelsetCommand()

public ref class LevelsetCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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:\Users\Public\Documents\LEADTOOLS Images"
End Class

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:\Users\Public\Documents\LEADTOOLS Images";
}

Requirements

Target Platforms

Reference

LevelsetCommand Members
Leadtools.ImageProcessing.Core Namespace
OtsuThresholdCommand Class
LambdaConnectednessCommand Class
ShrinkWrapCommand Class
WatershedCommand Class
GWireCommand Class