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

Objective-C

C++/CLI

Java

Python

public class CLAHECommand : RasterCommand

@interface LTCLAHECommand : LTRasterCommand

public class CLAHECommand 
    extends RasterCommand

public ref class CLAHECommand : public RasterCommand

class CLAHECommand(RasterCommand):

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

Java

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:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.*; 
 
 
public void claheCommandExample() { 
 
    final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
    // Load an image 
    RasterCodecs codecs = new RasterCodecs(); 
    codecs.setThrowExceptionsOnInvalidImages(true); 
 
    RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "DICOM\\IMAGE3.dcm")); 
    String destFileName = combine(LEAD_VARS_IMAGES_DIR, "CLAHERes.Tif"); 
 
    // Prepare the command 
    CLAHECommand command = new CLAHECommand(); 
 
    // Apply a CLAHE filter 
    command.setFlags(CLAHECommandFlags.APPLY_RAYLIEH_DISTRIBUTION.getValue()); 
    command.setAlphaFactor(0.65f); 
    command.setTileHistClipLimit(0.08f); 
    command.setTilesNumber(6); 
    command.setBinNumber(128); 
 
    command.run(image); 
 
    // Save it to disk 
    codecs.save(image, destFileName, RasterImageFormat.TIF, 16); 
 
    System.out.println("Command run and image saved to " + destFileName); 
    assertTrue(new File(destFileName).exists()); 
}

Requirements

Target Platforms

Reference

CLAHECommand Members

Leadtools.ImageProcessing.Core Namespace

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies