com.openinventor.imageviz.engines.edgedetection.edgemarking

Class SoEigenvaluesToStructurenessProcessing3d

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.edgemarking.SoEigenvaluesToStructurenessProcessing3d

All Implemented Interfaces:

SafeDisposable

public class SoEigenvaluesToStructurenessProcessing3d
extends SoImageVizEngine

SoEigenvaluesToStructurenessProcessing3d engine computes a structure score image. It allows to extract tubular, blob-like and plate-like structures from dark or bright background.

The computation is based on eigen values , and where .

The structure score for bright tubular structures corresponds to :

and the score for bright blob-like structures is computed as follow :

and the score for bright plate-like structures is computed as follow :

where is the Hessian norm

is a threshold which controls the flatness sensitivity, is a threshold which controls the blobness sensitivity, and c is a sensitivity threshold which controls the noise influence. with the maximum Hessian norm in the image.

For dark objects the conditions on , and are reversed.

The method is referenced by Frangi publication :

A.F.Frangi, W.J.Niessen, K.L.Vincken, M.A.Viergever, "Multiscale vessel enhancement filtering"
Lecture Notes in Computer Science(MICCAI), vol. 1496, pp. 130-137, 1998.

This filter provides output float grayscale image where each voxel intensity represents a structure score.

File format/default:

EigenvaluesToStructurenessProcessing3d {

inEigenvaluesImage	NULL
lightness	BRIGHT
structureType	ROD
alpha	0.75f
beta	0.75f
noiseCutoff	0.5f

}

Library references: EigenvaluesToStructureness3D

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SoEigenvaluesToStructurenessProcessing3d.LightnessType
static class	SoEigenvaluesToStructurenessProcessing3d.StructureTypes

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
SoSFFloat	alpha Flatness sensitivity threshold.
SoSFFloat	beta Blobness sensitivity threshold.
SoSFImageDataAdapter	inEigenvaluesImage Image containing input eigenvalues field.
SoSFEnum<SoEigenvaluesToStructurenessProcessing3d.LightnessType>	lightness The type of structure lightness to extract.
SoSFFloat	noiseCutoff Noise scale factor.
SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter>	outImage Output image.
SoSFEnum<SoEigenvaluesToStructurenessProcessing3d.StructureTypes>	structureType The type of structure lightness to extract.

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

onBegin, onEnd, onProgress

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoEigenvaluesToStructurenessProcessing3d() 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, getName, isDisposable, isSynchronizable, setName, setSynchronizable, touch

Methods inherited from class com.openinventor.inventor.Inventor

getNativeResourceHandle

Methods inherited from class java.lang.Object

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

Field Detail

inEigenvaluesImage

public final SoSFImageDataAdapter inEigenvaluesImage

Image containing input eigenvalues field. Type must be float.

Spectral series size is 3:

• channel 0 = largest Eigen value ( ),
• channel 1 = medium Eigen value ( ).
• channel 2 = smallest Eigen value ( ). Default value is NULL. Supported types include: grayscale color image.

lightness

public final SoSFEnum<SoEigenvaluesToStructurenessProcessing3d.LightnessType> lightness

The type of structure lightness to extract. . Default is BRIGHT

structureType

public final SoSFEnum<SoEigenvaluesToStructurenessProcessing3d.StructureTypes> structureType

The type of structure lightness to extract. . Default is ROD

alpha

public final SoSFFloat alpha

Flatness sensitivity threshold. It corresponds to the term of the score equation. Default value is 0.75f.

beta

public final SoSFFloat beta

Blobness sensitivity threshold. It corresponds to the term of the score equation. Default value is 0.75f.

noiseCutoff

public final SoSFFloat noiseCutoff

Noise scale factor. It is used for computing the c term of the score equation. Default value is 0.5f.

outImage

public final SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter> outImage

Output image. Size (except spectral series, only one), calibration, type and interpretation of the outImage image are forced to the same values as inEigenvaluesImage. All values are between 0 and 1. Default value is NULL. Supported types include: grayscale binary label color image.

Constructor Detail

SoEigenvaluesToStructurenessProcessing3d

public SoEigenvaluesToStructurenessProcessing3d()

Constructor.