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SoCooccurrenceQuantification2d Class

OIV.ImageViz.Engines.ImageAnalysis.Statistics.SoCooccurrenceQuantification2d engine provides texture indicators based on the co-occurrence matrix computation.

Inheritance Hierarchy

Namespace: OIV.ImageViz.Engines.ImageAnalysis.Statistics
Assembly: OIV.ImageViz (in OIV.ImageViz.dll) Version: 10.12.3.0 (10.12.3.0)
Syntax
public class SoCooccurrenceQuantification2d : SoImageVizEngine

The SoCooccurrenceQuantification2d type exposes the following members.

Constructors
  NameDescription
Public methodSoCooccurrenceQuantification2d

Constructor.

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Methods
  NameDescription
Public methodAbortEvaluate

Abort current processing as soon as possible.

(Inherited from SoImageVizEngine.)
Public methodCopy

Creates and returns an exact copy of the engine.

(Inherited from SoEngine.)
Public methodCopyFieldValues(SoFieldContainer)
Calls CopyFieldValues(fc, false).
(Inherited from SoFieldContainer.)
Public methodCopyFieldValues(SoFieldContainer, Boolean)

Copies the contents of fc's fields into this object's fields.

(Inherited from SoFieldContainer.)
Public methodDispose
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.)
Public methodEnableNotify

Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false).

(Inherited from SoFieldContainer.)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodFieldsAreEqual

Returns true if this object's fields are exactly equal to fc's fields.

(Inherited from SoFieldContainer.)
Public methodGet

Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

(Inherited from SoFieldContainer.)
Public methodGetAllFields

Returns a list of fields, including the eventIn's and eventOut's.

(Inherited from SoFieldContainer.)
Public methodGetEventIn

Returns a the eventIn with the given name.

(Inherited from SoFieldContainer.)
Public methodGetEventOut

Returns the eventOut with the given name.

(Inherited from SoFieldContainer.)
Public methodGetField

Returns a the field of this object whose name is fieldName.

(Inherited from SoFieldContainer.)
Public methodGetFieldName

Returns the name of the given field in the fieldName argument.

(Inherited from SoFieldContainer.)
Public methodGetFields

Appends references to all of this object's fields to resultList, and returns the number of fields appended.

(Inherited from SoFieldContainer.)
Public methodGetHashCode
Overrides GetHashCode().
(Inherited from SoNetBase.)
Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetOutput

Returns a reference to the engine output with the given name.

(Inherited from SoEngine.)
Public methodGetOutputName

Returns (in outputName) the name of the engine output (output).

(Inherited from SoEngine.)
Public methodGetOutputs

Returns a list of outputs in this engine.

(Inherited from SoEngine.)
Public methodGetStringName (Inherited from SoBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodHasDefaultValues

Returns true if all of the object's fields have their default values.

(Inherited from SoFieldContainer.)
Public methodIsEvaluating

Returns true if the engine evaluation is in progress.

(Inherited from SoImageVizEngine.)
Public methodIsNotifyEnabled

Notification is the process of telling interested objects that this object has changed.

(Inherited from SoFieldContainer.)
Public methodIsSynchronizable

Gets the ScaleViz synchronizable state of this object.

(Inherited from SoBase.)
Public methodSet

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.)
Public methodSetName (Inherited from SoBase.)
Public methodSetSynchronizable

Sets this to be a ScaleViz synchronizable object.

(Inherited from SoBase.)
Public methodSetToDefaults

Sets all fields in this object to their default values.

(Inherited from SoFieldContainer.)
Public methodStartEvaluate

Evaluate engine and dependencies in another thread without blocking the current one.

(Inherited from SoImageVizEngine.)
Public methodToString
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.)
Public methodTouch

Marks an instance as modified, simulating a change to it.

(Inherited from SoBase.)
Public methodWaitEvaluate

Wait for the end of engine evaluation.

(Inherited from SoImageVizEngine.)
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Properties
  NameDescription
Public propertyinImage

The input image.

Public propertyinMaskImage

The binary image for the mask or empty (command looks for only inside).

Public propertyIsDisposable
ISafeDisposable interface implementation.
(Inherited from SoDisposable.)
Public propertyoffsetX

The X Offset.

Public propertyoffsetY

The Y Offset.

Public propertyoutResult

The output measure result.

Public propertyUserData
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.)
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Events
  NameDescription
Public eventOnBegin

Event raised when the processing begins.

(Inherited from SoImageVizEngine.)
Public eventOnEnd

Event raised when processing ends and the result is available.

(Inherited from SoImageVizEngine.)
Public eventOnProgress

Event raised while processing is running.

(Inherited from SoImageVizEngine.)
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Remarks

The OIV.ImageViz.Engines.ImageAnalysis.Statistics.SoCooccurrenceQuantification2d engine provides some information concerning the texture thanks to the computation of a co-occurrence matrix. This command allow s to classify, given a direction , pairs of pixels by their gray level. The co-occurrence matrix components are given by : Where is the image graylevel for coordinates. This formulation means that for a given pair , contains the number of pixels verifying and .

This matrix is made symmetric and normalized such as :

These operations allow to be independent to the image size and to hold properties on a direction and its symmetric. Thirteen indicators are computed from this matrix :

  • an angular second moment indicator (ASM), also called uniformity. This indicator takes high values when image pixels present strong local uniformity.

  • a contrast indicator (Con). This indicator takes high values for great gray level variations.

  • a correlation indicator (Cor) which measures the dependency between gray levels and those of neighbouring pixels. where :

  • a variance indicator (SSV) also called sum of squares. This indicator measures the dispersion of the combination of gray levels and their neighbour pixels around the mean.

  • an inverse difference moment (IDM) also called homogeneity.

  • a sum average indicator (SAv).

  • a sum variance indicator (SVa).

  • a sum entropy indicator (SEn).

  • an entropy indicator (Ent).

  • a difference variance indicator (DVa).

  • a difference entropy indicator (DEn).

  • two information measures of correlation (IC1 and IC2). where HX and HY are entropies of px and py such as : and

In addition this engine returns one more information in the result object which is the number of image pixels used for computation.

References

Haralick R., Shanmugam K. & Dinstein I. "Textural features for image classification." IEEE Transactions on Systems, Man, and Cybernetics. Vol 3, No 6, pp 610-621, October 1973.

FILE FORMAT/DEFAULT

CooccurrenceQuantification2d {
inImage NULL
inMaskImage NULL
offsetX 1
offsetY 0
}

Library references: cooccurrence

See Also