Class TonemapDurand

This algorithm decomposes image into two layers: base layer and detail layer using bilateral filter and compresses contrast of the base layer thus preserving all the details.

This implementation uses regular bilateral filter from OpenCV.

Saturation enhancement is possible as in cv::TonemapDrago.

For more information see @cite DD02 .

Inheritance
System.Object
DisposableObject
DisposableCvObject
Algorithm
Tonemap
TonemapDurand
Implements
Inherited Members
Namespace: OpenCvSharp.XPhoto
Assembly: OpenCvSharp.dll
Syntax
public sealed class TonemapDurand : Tonemap, ICvPtrHolder

Properties

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Contrast

Gets or sets resulting contrast on logarithmic scale, i. e. log(max / min), where max and min

Declaration
public float Contrast { get; set; }
Property Value
Type Description
System.Single
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Saturation

Gets or sets positive saturation enhancement value. 1.0 preserves saturation, values greater than 1 increase saturation and values less than 1 decrease it.

Declaration
public float Saturation { get; set; }
Property Value
Type Description
System.Single
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SigmaColor

Gets or sets bilateral filter sigma in color space

Declaration
public float SigmaColor { get; set; }
Property Value
Type Description
System.Single
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SigmaSpace

Gets or sets bilateral filter sigma in coordinate space

Declaration
public float SigmaSpace { get; set; }
Property Value
Type Description
System.Single

Methods

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Create(Single, Single, Single, Single, Single)

Creates TonemapDurand object

Declaration
public static TonemapDurand Create(float gamma = 1F, float contrast = 4F, float saturation = 1F, float sigmaSpace = 2F, float sigmaColor = 2F)
Parameters
Type Name Description
System.Single gamma

positive value for gamma correction. Gamma value of 1.0 implies no correction, gamma equal to 2.2f is suitable for most displays. Generally gamma > 1 brightens the image and gamma < 1 darkens it.
System.Single contrast

resulting contrast on logarithmic scale, i. e. log(max / min), where max and min
System.Single saturation

positive saturation enhancement value. 1.0 preserves saturation, values greater than 1 increase saturation and values less than 1 decrease it.
System.Single sigmaSpace

bilateral filter sigma in coordinate space
System.Single sigmaColor

bilateral filter sigma in color space
Returns
Type Description
TonemapDurand
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DisposeManaged()

Releases managed resources

Declaration
protected override void DisposeManaged()
Overrides
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DisposeUnmanaged()

Declaration
protected override void DisposeUnmanaged()
Overrides
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Get()

Declaration
public override IntPtr Get()
Returns
Type Description
IntPtr
Overrides

Implements