Class ShapeContextDistanceExtractor

Implementation of the Shape Context descriptor and matching algorithm

Inheritance

System.Object

DisposableObject

DisposableCvObject

Algorithm

ShapeDistanceExtractor

ShapeContextDistanceExtractor

Implements

ICvPtrHolder

Inherited Members

ShapeDistanceExtractor.ComputeDistance(InputArray, InputArray)

Algorithm.Write(FileStorage)

Algorithm.Read(FileNode)

Algorithm.Empty

Algorithm.Save(String)

Algorithm.GetDefaultName()

DisposableCvObject.ptr

DisposableCvObject.CvPtr

DisposableObject.DataHandle

DisposableObject.IsDisposed

DisposableObject.IsEnabledDispose

DisposableObject.AllocatedMemory

DisposableObject.AllocatedMemorySize

DisposableObject.Dispose()

DisposableObject.Dispose(Boolean)

DisposableObject.AllocGCHandle(Object)

DisposableObject.AllocMemory(Int32)

DisposableObject.NotifyMemoryPressure(Int64)

DisposableObject.ThrowIfDisposed()

Namespace: OpenCvSharp

Assembly: OpenCvSharp.dll

Syntax

public class ShapeContextDistanceExtractor : ShapeDistanceExtractor, ICvPtrHolder

Remarks

proposed by Belongie et al. in "Shape Matching and Object Recognition Using Shape Contexts" (PAMI2002). This implementation is packaged in a generic scheme, in order to allow you the implementation of the common variations of the original pipeline.

Constructors

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ShapeContextDistanceExtractor(IntPtr)

Declaration

protected ShapeContextDistanceExtractor(IntPtr p)

Parameters

Type	Name	Description
IntPtr	p

Properties

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AngularBins

The number of angular bins in the shape context descriptor.

Declaration

public int AngularBins { get; set; }

Property Value

Type	Description
System.Int32

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BendingEnergyWeight

The weight of the Bending Energy in the final distance value.

Declaration

public float BendingEnergyWeight { get; set; }

Property Value

Type	Description
System.Single

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ImageAppearanceWeight

The weight of the appearance cost in the final distance value.

Declaration

public float ImageAppearanceWeight { get; set; }

Property Value

Type	Description
System.Single

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InnerRadius

The value of the inner radius.

Declaration

public float InnerRadius { get; set; }

Property Value

Type	Description
System.Single

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Iterations

Declaration

public int Iterations { get; set; }

Property Value

Type	Description
System.Int32

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OuterRadius

The value of the outer radius.

Declaration

public float OuterRadius { get; set; }

Property Value

Type	Description
System.Single

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RadialBins

The number of radial bins in the shape context descriptor.

Declaration

public int RadialBins { get; set; }

Property Value

Type	Description
System.Int32

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RotationInvariant

Declaration

public bool RotationInvariant { get; set; }

Property Value

Type	Description
System.Boolean

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ShapeContextWeight

The weight of the shape context distance in the final distance value.

Declaration

public float ShapeContextWeight { get; set; }

Property Value

Type	Description
System.Single

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StdDev

The value of the standard deviation for the Gaussian window for the image appearance cost.

Declaration

public float StdDev { get; set; }

Property Value

Type	Description
System.Single

Methods

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Create(Int32, Int32, Single, Single, Int32)

Complete constructor

Declaration

public static ShapeContextDistanceExtractor Create(int nAngularBins = 12, int nRadialBins = 4, float innerRadius = 0.2F, float outerRadius = 2F, int iterations = 3)

Parameters

Type	Name	Description
System.Int32	nAngularBins	The number of angular bins in the shape context descriptor.
System.Int32	nRadialBins	The number of radial bins in the shape context descriptor.
System.Single	innerRadius	The value of the inner radius.
System.Single	outerRadius	The value of the outer radius.
System.Int32	iterations

Returns

Type	Description
ShapeContextDistanceExtractor

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DisposeManaged()

Releases managed resources

Declaration

protected override void DisposeManaged()

Overrides

DisposableObject.DisposeManaged()

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DisposeUnmanaged()

Declaration

protected override void DisposeUnmanaged()

Overrides

DisposableCvObject.DisposeUnmanaged()

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Get()

Declaration

public override IntPtr Get()

Returns

Type	Description
IntPtr

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GetImages(OutputArray, OutputArray)

Get the images that correspond to each shape. This images are used in the calculation of the Image Appearance cost.

Declaration

public void GetImages(OutputArray image1, OutputArray image2)

Parameters

Type	Name	Description
OutputArray	image1	Image corresponding to the shape defined by contours1.
OutputArray	image2	Image corresponding to the shape defined by contours2.

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SetImages(InputArray, InputArray)

Set the images that correspond to each shape. This images are used in the calculation of the Image Appearance cost.

Declaration

public void SetImages(InputArray image1, InputArray image2)

Parameters

Type	Name	Description
InputArray	image1	Image corresponding to the shape defined by contours1.
InputArray	image2	Image corresponding to the shape defined by contours2.

Implements

ICvPtrHolder