com.openinventor.imageviz.engines.edgedetection.otherderivatives

Class SoHessianMatrixProcessing2d

java.lang.Object

com.openinventor.inventor.Inventor

com.openinventor.inventor.misc.SoBase

com.openinventor.inventor.fields.SoFieldContainer

com.openinventor.inventor.engines.SoEngine

com.openinventor.imageviz.engines.SoImageVizEngine

com.openinventor.imageviz.engines.edgedetection.otherderivatives.SoHessianMatrixProcessing2d

All Implemented Interfaces:

SafeDisposable

public class SoHessianMatrixProcessing2d
extends SoImageVizEngine

SoHessianMatrixProcessing2d engine computes the local Hessian matrix The 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 SoEigenDecompositionProcessing2d can be applied on the spectral image output.

SEE ALSO

SoGaussianDerivativeProcessing, SoEigenDecompositionProcessing2d, SoHessianMatrixProcessing3d

File format/default:

HessianMatrixProcessing2d {

inImage	NULL
standardDeviation	1.0f 1.0f

}

Library references: hessianmatrix

Nested Class Summary

Nested classes/interfaces inherited from class com.openinventor.imageviz.engines.SoImageVizEngine

SoImageVizEngine.ComputeModes, SoImageVizEngine.EventArg, SoImageVizEngine.Neighborhood3ds

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Inventor.ConstructorCommand

Field Summary

Fields

Modifier and Type	Field and Description
SoSFImageDataAdapter	inImage Input image.
SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter>	outSymmetricMatrixImage Output image.
SoSFVec2f	standardDeviation Sigma for each direction (X, Y).

Fields inherited from class com.openinventor.imageviz.engines.SoImageVizEngine

CONNECTIVITY_18, CONNECTIVITY_26, CONNECTIVITY_6, MODE_2D, MODE_3D, MODE_AUTO, onBegin, onEnd, onProgress

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoHessianMatrixProcessing2d() Constructor.

Method Summary

Methods inherited from class com.openinventor.imageviz.engines.SoImageVizEngine

abortEvaluate, isEvaluating, startEvaluate, waitEvaluate

Methods inherited from class com.openinventor.inventor.engines.SoEngine

copy, getByName, getOutput, getOutputName

Methods inherited from class com.openinventor.inventor.fields.SoFieldContainer

copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults

Methods inherited from class com.openinventor.inventor.misc.SoBase

dispose, getEXTERNPROTO, getName, getPROTO, isDisposable, isSynchronizable, setName, setSynchronizable, touch

Methods inherited from class com.openinventor.inventor.Inventor

getAddress, getNativeResourceHandle, startInternalThreads, stopInternalThreads

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

inImage

public final SoSFImageDataAdapter inImage

Input image. Default value is NULL. Supported types include: grayscale image.

standardDeviation

public final SoSFVec2f standardDeviation

Sigma for each direction (X, Y). Each value must be greater than 0.0. Default value is SbVec2f(1.0f,1.0f).

outSymmetricMatrixImage

public final SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter> outSymmetricMatrixImage

Output image. Default value is NULL. Supported types include: grayscale image.

Constructor Detail

SoHessianMatrixProcessing2d

public SoHessianMatrixProcessing2d()

Constructor.