CLAHECommand Class

Adjusts the image contrast using the Contrast Limited Adaptive Histogram Equalizer (CLAHE) method, Which uses several histograms, each corresponding to a distinct section in the image, while limiting the amplification of the noise in the image.

Object Model

Syntax

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

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

'Declaration

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

'Usage

Dim instance As CLAHECommand

public sealed class CLAHECommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTCLAHECommand : LTRasterCommand

public class CLAHECommand extends RasterCommand

function Leadtools.ImageProcessing.Core.CLAHECommand()

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

Remarks

This command supports 16-bit grayscale images. Support for 16-bit grayscale images is available in the Document and Medical Imaging toolkits
This command does not support 32-bit grayscale 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 CLAHECommandExample()
    Dim codecs As New RasterCodecs()
    codecs.ThrowExceptionsOnInvalidImages = True
    Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm"))

    ' Prepare the command
    Dim command As CLAHECommand = New CLAHECommand
    'Apply a CLAHE filter.
    command.Flags = CLAHECommandFlags.ApplyRayliehDistribution
    command.AlphaFactor = 0.65F
    command.TileHistClipLimit = 0.08F
    command.TilesNumber = 6
    command.BinNumber = 128
    command.Run(leadImage)

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 CLAHECommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs() ;
   codecs.ThrowExceptionsOnInvalidImages = true ;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")) ;
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "CLAHERes.Tif") ;

   // Prepare the command
   CLAHECommand command = new CLAHECommand() ;

   //Apply a CLAHE filter.
   command.Flags = CLAHECommandFlags.ApplyRayliehDistribution;
   command.AlphaFactor = 0.65f ;
   command.TileHistClipLimit = 0.08f ;
   command.TilesNumber = 6 ;
   command.BinNumber = 128 ;
   command.Run(image);

   // Save it to disk
   codecs.Save(image, destFileName, RasterImageFormat.Tif, 16);

}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Requirements

Target Platforms

Reference

CLAHECommand Members
Leadtools.ImageProcessing.Core Namespace