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SoTensorVotingProcessing2d Class

OIV.ImageViz.Engines.EdgeDetection.EdgeMarking.SoTensorVotingProcessing2d engine.

Inheritance Hierarchy

Namespace: OIV.ImageViz.Engines.EdgeDetection.EdgeMarking
Assembly: OIV.ImageViz (in OIV.ImageViz.dll) Version: 10.12.3.0 (10.12.3.0)
Syntax
public class SoTensorVotingProcessing2d : SoImageVizEngine

The SoTensorVotingProcessing2d type exposes the following members.

Constructors
  NameDescription
Public methodSoTensorVotingProcessing2d

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 propertyinFeatureImage

Input feature image.

Public propertyinVectorImage

Input orientation vector image.

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

Output ballness image.

Public propertyoutputSelection

Enable the computation of selected outputs.

Public propertyoutSaliencyImage

Output saliency image.

Public propertyoutTensorImage

Output tensor image.

Public propertyoutVectorImage

Output orientation vector image.

Public propertyscale

This parameter acts on the gap length filled by the tensor voting algorithm.

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.EdgeDetection.EdgeMarking.SoTensorVotingProcessing2d engine strengthens an image local features according to their consistency with a model of smooth curves.

The computation will use a feature score image and an orientation vector image.

The voting field used assumes that the best connection between two points with one orientation imposes a circular arc that decays with the radius according to a Gaussian function. The voting field size is defined by the parameter "scale".

This voting field can be illustrated on the unit sphere:

The method is referenced by Franken and van Almsick publication E.Franken, M.van Almsick, P.Rongen, L.Florack, B.ter Haar Romeny, "An efficient method for tensor voting using steerable filters." Computer Vision - ECCV 2006. Springer, pp. 228-240, 2006.

Different outputs can be computed by this filter and are selected with the "outputSelection" parameter. Only the outputs necessary to the application can be selected in order to minimize memory and computation time usage.

This filter can provide an output spectral image where each channel represents a tensor component set in the following order , , .

The saliency, ballness and orientation vector images can be extracted from this tensor image following:

  • Orientation:

  • Saliency:

  • Ballness:

The saliency can be interpreted as a measure for the orientation certainty or a measure of anisotropy of the ellipse in orientation given in outVectorImage.

The ballness can be interpreted as a measure for the orientation uncertainty or a measure of isotropy.

The orientation vector image defines the main orientation of the output tensor.

FILE FORMAT/DEFAULT

TensorVotingProcessing2d {
inFeatureImage NULL
inVectorImage NULL
scale 5.0
outputSelection SALIENCY
}

Library references: TensorVoting2d

See Also