SoHessianMatrixProcessing2d Class

OIV.ImageViz.Engines.EdgeDetection.OtherDerivatives.SoHessianMatrixProcessing2d engine computes the local Hessian matrix.

Inheritance Hierarchy

SystemObject
  OIV.InventorSoNetBase
    OIV.InventorSoDisposable
      OIV.Inventor.MiscSoBase
        OIV.Inventor.FieldsSoFieldContainer
          OIV.Inventor.EnginesSoEngine
            OIV.ImageViz.EnginesSoImageVizEngine
              OIV.ImageViz.Engines.EdgeDetection.OtherDerivativesSoHessianMatrixProcessing2d

Namespace: OIV.ImageViz.Engines.EdgeDetection.OtherDerivatives
Assembly: OIV.ImageViz (in OIV.ImageViz.dll) Version: 2023.1.3.0 (2023.1.3)

Syntax

C++

Copy

public class SoHessianMatrixProcessing2d : SoImageVizEngine

Public Class SoHessianMatrixProcessing2d
	Inherits SoImageVizEngine

public ref class SoHessianMatrixProcessing2d : public SoImageVizEngine

type SoHessianMatrixProcessing2d =  
    class
        inherit SoImageVizEngine
    end

The SoHessianMatrixProcessing2d type exposes the following members.

Constructors

	Name	Description
	SoHessianMatrixProcessing2d	Constructor.

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Methods

	Name	Description
	AbortEvaluate	Abort current processing as soon as possible. (Inherited from SoImageVizEngine.)
	Copy	Creates and returns an exact copy of the engine. (Inherited from SoEngine.)
	CopyFieldValues(SoFieldContainer)	Calls CopyFieldValues(fc, false). (Inherited from SoFieldContainer.)
	CopyFieldValues(SoFieldContainer, Boolean)	Copies the contents of fc's fields into this object's fields. (Inherited from SoFieldContainer.)
	Dispose	Releases all resources used by SoDisposable. (Inherited from SoDisposable.)
	EnableNotify	Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false). (Inherited from SoFieldContainer.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	FieldsAreEqual	Returns true if this object's fields are exactly equal to fc's fields. (Inherited from SoFieldContainer.)
	Get	Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. (Inherited from SoFieldContainer.)
	GetAllFields	Returns a list of fields, including the eventIn's and eventOut's. (Inherited from SoFieldContainer.)
	GetEventIn	Returns a the eventIn with the given name. (Inherited from SoFieldContainer.)
	GetEventOut	Returns the eventOut with the given name. (Inherited from SoFieldContainer.)
	GetField	Returns a the field of this object whose name is fieldName. (Inherited from SoFieldContainer.)
	GetFieldName	Returns the name of the given field in the fieldName argument. (Inherited from SoFieldContainer.)
	GetFields	Appends references to all of this object's fields to resultList, and returns the number of fields appended. (Inherited from SoFieldContainer.)
	GetHashCode	Overrides GetHashCode(). (Inherited from SoNetBase.)
	GetName	Returns the name of an instance. (Inherited from SoBase.)
	GetOutput	Returns a reference to the engine output with the given name. (Inherited from SoEngine.)
	GetOutputName	Returns (in outputName) the name of the engine output (output). (Inherited from SoEngine.)
	GetOutputs	Returns a list of outputs in this engine. (Inherited from SoEngine.)
	GetStringName	(Inherited from SoBase.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	HasDefaultValues	Returns true if all of the object's fields have their default values. (Inherited from SoFieldContainer.)
	IsEvaluating	Returns true if the engine evaluation is in progress. (Inherited from SoImageVizEngine.)
	IsNotifyEnabled	Notification is the process of telling interested objects that this object has changed. (Inherited from SoFieldContainer.)
	IsSynchronizable	Gets the ScaleViz synchronizable state of this object. (Inherited from SoBase.)
	Set	Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format. (Inherited from SoFieldContainer.)
	SetName	(Inherited from SoBase.)
	SetSynchronizable	Sets this to be a ScaleViz synchronizable object. (Inherited from SoBase.)
	SetToDefaults	Sets all fields in this object to their default values. (Inherited from SoFieldContainer.)
	StartEvaluate	Evaluate engine and dependencies in another thread without blocking the current one. (Inherited from SoImageVizEngine.)
	ToString	Converts this SoBase structure to a human readable string. (Inherited from SoBase.)
	Touch	Marks an instance as modified, simulating a change to it. (Inherited from SoBase.)
	WaitEvaluate	Wait for the end of engine evaluation. (Inherited from SoImageVizEngine.)

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Properties

	Name	Description
	inImage	Input image.
	IsDisposable	ISafeDisposable interface implementation. (Inherited from SoDisposable.)
	outSymmetricMatrixImage	Output image.
	standardDeviation	Sigma for each direction (X, Y).
	UserData	Gets or sets the user data to be contained by the field container. (Inherited from SoFieldContainer.)

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Events

	Name	Description
	OnBegin	Event raised when the processing begins. (Inherited from SoImageVizEngine.)
	OnEnd	Event raised when processing ends and the result is available. (Inherited from SoImageVizEngine.)
	OnProgress	Event raised while processing is running. (Inherited from SoImageVizEngine.)

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Remarks

The OIV.ImageViz.Engines.EdgeDetection.OtherDerivatives.SoHessianMatrixProcessing2d engine computes the local Hessian matrix by convolving the input image with the 2nd order derivatives of a Gaussian Kernel.

Each channel of the Hessian matrix represents a second order partial derivative.

For instance, , .

This filter provides an output spectral image where each channel represents a 2nd order derivative set in the following order , , .

In order to extract the eigenvalues or vectors of the Hessian image the OIV.ImageViz.Engines.ArithmeticAndLogic.ArithmeticOperations.SoEigenDecompositionProcessing2d can be applied on the spectral image output.

FILE FORMAT/DEFAULT

HessianMatrixProcessing2d {
inImage NULL
standardDeviation 1.0f 1.0f
}

Library references: hessianmatrix

Reference

OIV.ImageViz.Engines.EdgeDetection.OtherDerivatives Namespace