com.openinventor.imageviz.engines.imageanalysis.morphometry

Class SoDegreeOfAnisotropyQuantification

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.imageanalysis.morphometry.SoDegreeOfAnisotropyQuantification

All Implemented Interfaces:

SafeDisposable

public class SoDegreeOfAnisotropyQuantification
extends SoImageVizEngine

SoDegreeOfAnisotropyQuantification engine The SoDegreeOfAnisotropyQuantification engine measures a 3D symmetry

For an introduction, see section Morphometry.

This engine computes a measure of 3D symmetry. It is a good indicator to detect structural alignments along particular directional axis. This engine uses mean intercept length and eigen value analysis.

Mean intercept length analysis allows the user to measure isotropy of a structure. It proceeds sending a set of oriented ray through the binarised 3D image volume. For each ray, the number of objects encountered is counted. A set of discreet angles are processed as described and for each one an averaged is done by using a regularly spaced grid of rays. The SoDegreeOfAnisotropyQuantification.interceptDistance field is the distance between two lines intercept. The pitch angle is fixed at 10 degrees (not radians).

A classical eigen value analysis of this cloud of values (mean of number of intersect in function of angle) is then done. This analysis allows one to extract a minimal and a maximal eigen value. The closest these values are, the less the structural anisotropy is. Indeed maximum and minimum eigen values equality means that their is no privileged structural direction.

Degree of anisotropy is 0 for total isotropy and 1 for total anisotropy.

See also:

SoStructureModelIndexQuantification3d, SoInertiaMomentProcessing2d.

File format/default:

DegreeOfAnisotropyQuantification {

computeMode	MODE_AUTO
inBinaryImage	NULL
interceptDistance	3

}

Library references: anisotropy_degree

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SoDegreeOfAnisotropyQuantification.SbAnisotropyDegreeDetail Results details of degree of anisotropy global measure.

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
SoSFEnum<SoImageVizEngine.ComputeModes>	computeMode Select the compute Mode (2D or 3D or AUTO) .
SoSFImageDataAdapter	inBinaryImage The input binary image.
SoSFInt32	interceptDistance The distance between two intercept lines.
SoImageVizEngineAnalysisOutput<SoDegreeOfAnisotropyQuantification.SbAnisotropyDegreeDetail>	outResult The output measure result.

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
SoDegreeOfAnisotropyQuantification() 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

computeMode

public final SoSFEnum<SoImageVizEngine.ComputeModes> computeMode

Select the compute Mode (2D or 3D or AUTO) . Default is MODE_AUTO

inBinaryImage

public final SoSFImageDataAdapter inBinaryImage

The input binary image. Default value is NULL. Supported types include: binary color image.

interceptDistance

public final SoSFInt32 interceptDistance

The distance between two intercept lines. Default value is 3.

outResult

public final SoImageVizEngineAnalysisOutput<SoDegreeOfAnisotropyQuantification.SbAnisotropyDegreeDetail> outResult

The output measure result. Default value is NULL.

Constructor Detail

SoDegreeOfAnisotropyQuantification

public SoDegreeOfAnisotropyQuantification()

Constructor.