Class AdaptiveHistogramEqualizationProcessor

Applies an adaptive histogram equalization to the image. The image is split up in tiles. For each tile a cumulative distribution function (cdf) is calculated. To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.

Inheritance
Object
HistogramEqualizationProcessor
AdaptiveHistogramEqualizationProcessor
Implements
Inherited Members
Namespace: SixLabors.ImageSharp.Processing.Processors.Normalization
Assembly: SixLabors.ImageSharp.dll
Syntax
public class AdaptiveHistogramEqualizationProcessor : HistogramEqualizationProcessor, IImageProcessor

Constructors

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AdaptiveHistogramEqualizationProcessor(Int32, Boolean, Int32, Int32)

Initializes a new instance of the AdaptiveHistogramEqualizationProcessor class.

Declaration
public AdaptiveHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, int clipLimit, int numberOfTiles)
Parameters
Type Name Description
Int32 luminanceLevels

The number of different luminance levels. Typical values are 256 for 8-bit grayscale images or 65536 for 16-bit grayscale images.
Boolean clipHistogram

Indicating whether to clip the histogram bins at a specific value.
Int32 clipLimit

The histogram clip limit. Histogram bins which exceed this limit, will be capped at this value.
Int32 numberOfTiles

The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.

Properties

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NumberOfTiles

Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.

Declaration
public int NumberOfTiles { get; }
Property Value
Type Description
Int32

Methods

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CreatePixelSpecificProcessor<TPixel>(Configuration, Image<TPixel>, Rectangle)

Creates a pixel specific IImageProcessor<TPixel> that is capable of executing the processing algorithm on an Image<TPixel>.

Declaration
public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>(Configuration configuration, Image<TPixel> source, Rectangle sourceRectangle)
    where TPixel : struct, IPixel<TPixel>
Parameters
Type Name Description
Configuration configuration

The configuration which allows altering default behaviour or extending the library.
Image<TPixel> source

The source image. Cannot be null.
Rectangle sourceRectangle

The Rectangle structure that specifies the portion of the image object to draw.
Returns
Type Description
IImageProcessor<TPixel>

The IImageProcessor<TPixel>
Type Parameters
Name Description
TPixel

The pixel type.
Overrides
SixLabors.ImageSharp.Processing.Processors.Normalization.HistogramEqualizationProcessor.CreatePixelSpecificProcessor<TPixel>(SixLabors.ImageSharp.Configuration, SixLabors.ImageSharp.Image<TPixel>, SixLabors.ImageSharp.Rectangle)

Implements