ShapeContextDistanceExtractor Class

Implementation of the Shape Context descriptor and matching algorithm

Inheritance Hierarchy

SystemObject
  OpenCvSharpDisposableObject
    OpenCvSharpDisposableCvObject
      OpenCvSharpAlgorithm
        OpenCvSharpShapeDistanceExtractor
          OpenCvSharpShapeContextDistanceExtractor

Namespace: OpenCvSharp
Assembly: OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0

Syntax

C++

Copy

public class ShapeContextDistanceExtractor : ShapeDistanceExtractor

Public Class ShapeContextDistanceExtractor
	Inherits ShapeDistanceExtractor

public ref class ShapeContextDistanceExtractor : public ShapeDistanceExtractor

type ShapeContextDistanceExtractor =  
    class
        inherit ShapeDistanceExtractor
    end

The ShapeContextDistanceExtractor type exposes the following members.

Constructors

	Name	Description
	ShapeContextDistanceExtractor	Initializes a new instance of the ShapeContextDistanceExtractor class

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Properties

	Name	Description
	AllocatedMemory	Gets or sets a memory address allocated by AllocMemory. (Inherited from DisposableObject.)
	AllocatedMemorySize	Gets or sets the byte length of the allocated memory (Inherited from DisposableObject.)
	AngularBins	The number of angular bins in the shape context descriptor.
	BendingEnergyWeight	The weight of the Bending Energy in the final distance value.
	CvPtr	Native pointer of OpenCV structure (Inherited from DisposableCvObject.)
	DataHandle	Gets or sets a handle which allocates using cvSetData. (Inherited from DisposableObject.)
	Empty	Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read (Inherited from Algorithm.)
	ImageAppearanceWeight	The weight of the appearance cost in the final distance value.
	InnerRadius	The value of the inner radius.
	IsDisposed	Gets a value indicating whether this instance has been disposed. (Inherited from DisposableObject.)
	IsEnabledDispose	Gets or sets a value indicating whether you permit disposing this instance. (Inherited from DisposableObject.)
	Iterations
	OuterRadius	The value of the outer radius.
	RadialBins	The number of radial bins in the shape context descriptor.
	RotationInvariant
	ShapeContextWeight	The weight of the shape context distance in the final distance value.
	StdDev	The value of the standard deviation for the Gaussian window for the image appearance cost.

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Methods

	Name	Description
	AllocGCHandle	Pins the object to be allocated by cvSetData. (Inherited from DisposableObject.)
	AllocMemory	Allocates the specified size of memory. (Inherited from DisposableObject.)
	ComputeDistance	Compute the shape distance between two shapes defined by its contours. (Inherited from ShapeDistanceExtractor.)
	Create	Complete constructor
	Dispose	Releases the resources (Inherited from DisposableObject.)
	Dispose(Boolean)	Releases the resources (Inherited from DisposableObject.)
	DisposeManaged	Releases managed resources (Overrides DisposableObjectDisposeManaged.)
	DisposeUnmanaged	releases unmanaged resources (Inherited from DisposableCvObject.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Destructor (Inherited from DisposableObject.)
	GetDefaultName	Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string. (Inherited from Algorithm.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetImages	Get the images that correspond to each shape. This images are used in the calculation of the Image Appearance cost.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	NotifyMemoryPressure	Notifies the allocated size of memory. (Inherited from DisposableObject.)
	Read	Reads algorithm parameters from a file storage (Inherited from Algorithm.)
	Save	Saves the algorithm to a file. In order to make this method work, the derived class must implement Algorithm::write(FileStorage fs). (Inherited from Algorithm.)
	SetImages	Set the images that correspond to each shape. This images are used in the calculation of the Image Appearance cost.
	ThrowIfDisposed	If this object is disposed, then ObjectDisposedException is thrown. (Inherited from DisposableObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Write	Stores algorithm parameters in a file storage (Inherited from Algorithm.)

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Fields

	Name	Description
	ptr	Data pointer (Inherited from DisposableCvObject.)

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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.

Reference

OpenCvSharp Namespace