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CLAHECommand Class

Summary

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.

Syntax

Java

Objective-C

WinRT C#

C++

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

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

public sealed class CLAHECommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

@interface LTCLAHECommand : LTRasterCommand

public class CLAHECommand extends RasterCommand

function Leadtools.ImageProcessing.Core.CLAHECommand()

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

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"; 
}