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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

C#

VB

Objective-C

C++

Java

public class CLAHECommand : RasterCommand

Public Class CLAHECommand  
   Inherits RasterCommand

@interface LTCLAHECommand : LTRasterCommand

public class CLAHECommand extends RasterCommand

public ref class CLAHECommand : public 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

C#

VB

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:\LEADTOOLS21\Resources\Images"; 
}

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:\LEADTOOLS21\Resources\Images" 
End Class

Requirements

Target Platforms

See Also

Reference

CLAHECommand Members

Leadtools.ImageProcessing.Core Namespace

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Leadtools.ImageProcessing.Core Assembly

Getting Started

Leadtools.ImageProcessing.Core Namespace

Classes

AlignImagesCommand Class

AnisotropicDiffusionCommand Class

ApplyLinearModalityLookupTableCommand Class

ApplyLinearVoiLookupTableCommand Class

ApplyModalityLookupTableCommand Class

ApplyTransformationParametersCommand Class

ApplyVoiLookupTableCommand Class

AutoBinarizeCommand Class

AutoCropCommand Class

AutoCropRectangleCommand Class

AutoDocumentBinarizationCommand Class

AutoLineRemoveCommand Class

AutoPageSplitterCommand Class

AutoSegmentCommand Class

AutoZoningCommand Class

BackGroundRemovalCommand Class

BarCodeReadPreprocessCommand Class

BezierPathCommand Class

BlankPageDetectorCommand Class

BlurDetectionCommand Class

BorderRemoveCommand Class

BorderRemoveCommandEventArgs Class

BrightnessDetectionCommand Class

CannyEdgeDetectorCommand Class

CLAHECommand Class

Members

CLAHECommand Constructor

Methods

Properties

Events

CMC7CodeDetectionCommand Class

ColorizeGrayCommand Class

ColorizeGrayCommandData Class

CompareBitmapCommand Class

ConvertSignedToUnsignedCommand Class

ConvertUnsignedToSignedCommand Class

CoreUtilities Class

CorrelationCommand Class

CorrelationListCommand Class

DeskewCommand Class

DeskewDetectionData Class

DespeckleCommand Class

DetectDeskewOrientationCommand Class

DicomLookupTableDescriptor Class

DigitalSubtractCommand Class

DiscreteFourierTransformCommand Class

DotRemoveCommand Class

DotRemoveCommandEventArgs Class

ExObjContentBound Class

ExObjContentBoundOptions Class

ExObjData Class

ExObjFilterOptions Class

ExObjObject Class

ExObjObjectList Class

ExObjOutlinePointList Class

ExObjResult Class

ExObjSegmentList Class

ExpandContentCommand Class

ExtractObjectsCommand Class

FastFourierTransformCommand Class

FastMagicWandCommand Class

FindCandidateFormFieldsCommand Class

FourierTransformDisplayCommand Class

FourierTransformInformation Class

FrequencyFilterCommand Class

FrequencyFilterMaskCommand Class

GetLinearVoiLookupTableCommand Class

GlareDetectionCommand Class

GWireCommand Class

HalfToneCommand Class

HalfTonePatternCommand Class

HighQualityRotateCommand Class

HolePunchRemoveCommand Class

HolePunchRemoveCommandEventArgs Class

ImageColorTypeCommand Class

InvertedPageCommand Class

InvertedTextCommand Class

InvertedTextCommandEventArgs Class

KaufmannRegionCommand Class

KeyStoneCommand Class

KMeansCommand Class

LambdaConnectednessCommand Class

LeadZoneDotLineData Class

LeadZoneTableData Class

LeadZoneTextData Class

LevelsetCommand Class

LineRemoveCommand Class

LineRemoveCommandEventArgs Class

ManualPerspectiveDeskewCommand Class

MaximumCommand Class

MeanShiftCommand Class

MedianCommand Class

MICRCodeDetectionCommand Class

MinimumCommand Class

MinimumToZeroCommand Class

MinMaxBitsCommand Class

MinMaxValuesCommand Class

MRZCodeDetectionCommand Class

MultiscaleEnhancementCommand Class

ObjectCounterCommand Class

ObjectCounterCommandEventArgs Class

OmrCommand Class

OrientationDetectionData Class

OtsuThresholdCommand Class

PerspectiveDeskewCommand Class

PointSpreadFunctionData Class

PreDefinedFilterCommand Class

RakeRemoveCommand Class

RakeRemoveCommandEventArgs Class

RemoveSaltPepperCommand Class

ResizeInterpolateCommand Class

SauvolaBinarizeCommand Class

SearchRegistrationMarksCommand Class

SearchRegistrationMarksCommandData Class

SelectDataCommand Class

ShiftDataCommand Class

ShrinkWrapCommand Class

SigmaCommand Class

SignalToNoiseRatioCommand Class

SliceCommand Class

SliceCommandEventArgs Class

SmoothCommand Class

SmoothCommandEventArgs Class

SRADAnisotropicDiffusionCommand Class

StentEnhancementCommand Class

SubtractBackgroundCommand Class

TADAnisotropicDiffusionCommand Class

TextBlurDetectorCommand Class

TissueEqualizeCommand Class

UnWarpCommand Class

WatershedCommand Class

WienerFilterCommand Class

WindowLevelCommand Class

WindowLevelExtCommand Class

ZeroToNegativeCommand Class

Delegates

Enumerations

Structures

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References ▼

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.