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Public Types | Public Member Functions | Public Attributes | List of all members
SoEigenvaluesToStructurenessProcessing2d Class Reference
ImageViz » Engines » Edge Detection » Edge Marking

ImageViz SoEigenvaluesToStructurenessProcessing2d engine computes a structure score image More...

#include <ImageViz/Engines/EdgeDetection/EdgeMarking/SoEigenvaluesToStructurenessProcessing2d.h>

+ Inheritance diagram for SoEigenvaluesToStructurenessProcessing2d:

Public Types

enum  Lightness {
  BRIGHT = 0 ,
  DARK = 1
}
 
enum  StructureType {
  ROD = 0 ,
  BALL = 1
}
 
- Public Types inherited from SoImageVizEngine
enum  ComputeMode {
  MODE_2D = 0 ,
  MODE_3D = 1 ,
  MODE_AUTO = 2
}
 Compute Mode This enum specifies whether the main input will be interpreted as a 3D volume or a stack of 2D images for processing. More...
 
enum  Neighborhood3d {
  CONNECTIVITY_6 = 0 ,
  CONNECTIVITY_18 = 1 ,
  CONNECTIVITY_26 = 2
}
 Neighborhood Connectivity 3D. More...
 

Public Member Functions

 SoEigenvaluesToStructurenessProcessing2d ()
 Constructor.
 
- Public Member Functions inherited from SoImageVizEngine
virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
virtual void startEvaluate ()
 Evaluate engine and dependencies in another thread without blocking the current one.
 
virtual void waitEvaluate ()
 Wait for the end of engine evaluation.
 
virtual void abortEvaluate ()
 Abort current processing as soon as possible.
 
virtual bool isEvaluating ()
 Returns true if the engine evaluation is in progress.
 
- Public Member Functions inherited from SoEngine
virtual int getOutputs (SoEngineOutputList &list) const
 Returns a list of outputs in this engine.
 
SoEngineOutput * getOutput (const SbName &outputName) const
 Returns a reference to the engine output with the given name.
 
SbBool getOutputName (const SoEngineOutput *output, SbName &outputName) const
 Returns (in outputName) the name of the engine output (output).
 
SoEngine * copy () const
 Creates and returns an exact copy of the engine.
 
- Public Member Functions inherited from SoFieldContainer
void setToDefaults ()
 Sets all fields in this object to their default values.
 
SbBool hasDefaultValues () const
 Returns TRUE if all of the object's fields have their default values.
 
SbBool fieldsAreEqual (const SoFieldContainer *fc) const
 Returns TRUE if this object's fields are exactly equal to fc's fields.
 
void copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
 Copies the contents of fc's fields into this object's fields.
 
SoNONUNICODE SbBool set (const char *fieldDataString)
 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.
 
SbBool set (const SbString &fieldDataString)
 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.
 
void get (SbString &fieldDataString)
 Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
 
virtual int getFields (SoFieldList &list) const
 Appends references to all of this object's fields to resultList, and returns the number of fields appended.
 
virtual int getAllFields (SoFieldList &list) const
 Returns a list of fields, including the eventIn's and eventOut's.
 
virtual SoField * getField (const SbName &fieldName) const
 Returns a the field of this object whose name is fieldName.
 
virtual SoField * getEventIn (const SbName &fieldName) const
 Returns a the eventIn with the given name.
 
virtual SoField * getEventOut (const SbName &fieldName) const
 Returns the eventOut with the given name.
 
SbBool getFieldName (const SoField *field, SbName &fieldName) const
 Returns the name of the given field in the fieldName argument.
 
SbBool enableNotify (SbBool flag)
 Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
 
SbBool isNotifyEnabled () const
 Notification is the process of telling interested objects that this object has changed.
 
virtual void setUserData (void *data)
 Sets application data.
 
void * getUserData (void) const
 Gets user application data.
 
- Public Member Functions inherited from SoBase
virtual void touch ()
 Marks an instance as modified, simulating a change to it.
 
virtual SbName getName () const
 Returns the name of an instance.
 
virtual void setName (const SbName &name)
 Sets the name of an instance.
 
void setSynchronizable (const bool b)
 Sets this to be a ScaleViz synchronizable object.
 
bool isSynchronizable () const
 Gets the ScaleViz synchronizable state of this object.
 
- Public Member Functions inherited from SoRefCounter
void ref () const
 Adds a reference to an instance.
 
void unref () const
 Removes a reference from an instance.
 
void unrefNoDelete () const
 unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
 
int getRefCount () const
 Returns current reference count.
 
void lock () const
 lock this instance.
 
void unlock () const
 unlock this instance.
 
- Public Member Functions inherited from SoTypedObject
SbBool isOfType (const SoType &type) const
 Returns TRUE if this object is of the type specified in type or is derived from that type.
 
template<typename TypedObjectClass >
SbBool isOfType () const
 Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.
 

Public Attributes

SoSFImageDataAdapter inEigenvaluesImage
 Image containing input eigenvalues field.
 
SoSFEnum lightness
 The type of structure lightness to extract.
 
SoSFEnum structureType
 Shape of structures to extract.
 
SoSFFloat beta
 Blobness sensitivity threshold.
 
SoSFFloat noiseCutoff
 Noise scale factor.
 
SoImageVizEngineOutput< SoSFImageDataAdapter, SoImageDataAdapter * > outImage
 Output image.
 
- Public Attributes inherited from SoImageVizEngine
SbEventHandler< EventArg & > onBegin
 Event raised when the processing begins.
 
SbEventHandler< EventArg & > onEnd
 Event raised when processing ends and the result is available.
 
SbEventHandler< EventArg & > onProgress
 Event raised while processing is running.
 

Additional Inherited Members

- Static Public Member Functions inherited from SoImageVizEngine
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoEngine
static SoType getClassTypeId ()
 Returns the type identifier for the SoEngine class.
 
static SoEngine * getByName (const SbName &name)
 Looks up engine(s) by name.
 
static int getByName (const SbName &name, SoEngineList &list)
 Looks up engine(s) by name.
 
- Static Public Member Functions inherited from SoFieldContainer
static SoType getClassTypeId ()
 Returns the type of this class.
 
- Static Public Member Functions inherited from SoBase
static SoType getClassTypeId ()
 Returns type identifier for this class.
 
- Static Public Member Functions inherited from SoTypedObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 

Detailed Description

ImageViz SoEigenvaluesToStructurenessProcessing2d engine computes a structure score image

It allows to extract tubular or blob-like structures from dark or bright background.

The computation is based on eigen values $\lambda_{1}$ and $\lambda_{2}$ where $\mid \lambda_{1} \mid \geq \mid \lambda_{2} \mid $.

The structure score for bright tubular structures corresponds to :

$ score = \left\{ \begin{array}{l l} 0 & \quad \text{if $\lambda_{1} > 0$, }\\ exp(- \frac{ \big( \frac{\lambda_{2}}{\lambda_{1}} \big) ^{2} }{2 \beta^{2} } ) \big(1-exp \big(- \frac{S^{2}}{2c^{2}} \big) \big) \\ \end{array} \right. $

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

$ score = \left\{ \begin{array}{l l} 0 & \quad \text{if $\lambda_{1} > 0$ or $\lambda_{2} > 0$, }\\ \big(1-exp(- \frac{ \big( \frac{\lambda_{2}}{\lambda_{1}} \big) ^{2} }{2 \beta^{2} } )\big) \big(1-exp \big(- \frac{S^{2}}{2c^{2}} \big) \big) \\ \end{array} \right. $

where $S$ is the Hessian norm $S = \sqrt{\lambda_{1}^{2}\lambda_{2}^{2}}$,
$\beta$ is a threshold which controls the blobness sensitivity,
and c is a sensitivity threshold wich controls the noise influence.
$c = noiseCutoff*S_{max}$ with $S_{max}$ the maximum Hessian norm in the image.

For dark objects the conditions on $\lambda_{1}$ and $\lambda_{2}$ 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 engine provides output float grayscale image where each voxel intensity represents a structure score.

FILE FORMAT/DEFAULT

    EigenvaluesToStructurenessProcessing2d {
    inEigenvaluesImage NULL
    lightness BRIGHT
    structureType ROD
    beta 0.75f
    noiseCutoff 0.5f
    }


Library references: EigenvaluesToStructureness2d

Definition at line 84 of file SoEigenvaluesToStructurenessProcessing2d.h.

Member Enumeration Documentation

◆ Lightness

enum SoEigenvaluesToStructurenessProcessing2d::Lightness
Enumerator
BRIGHT 

Extracts bright structures from dark background.

DARK 

Extracts dark structures from bright background.

Definition at line 101 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ StructureType

enum SoEigenvaluesToStructurenessProcessing2d::StructureType
Enumerator
ROD 

Extracts tubular structures.

BALL 

Extracts blob-like structures.

Definition at line 120 of file SoEigenvaluesToStructurenessProcessing2d.h.

Constructor & Destructor Documentation

◆ SoEigenvaluesToStructurenessProcessing2d()

SoEigenvaluesToStructurenessProcessing2d::SoEigenvaluesToStructurenessProcessing2d ( )

Constructor.

Member Data Documentation

◆ beta

SoSFFloat SoEigenvaluesToStructurenessProcessing2d::beta

Blobness sensitivity threshold.

It corresponds to the $\beta$ term of the score equation. Default value is 0.75f.

Definition at line 138 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ inEigenvaluesImage

SoSFImageDataAdapter SoEigenvaluesToStructurenessProcessing2d::inEigenvaluesImage

Image containing input eigenvalues field.

Type must be float. Spectral series size is 2 (channel 0 = largest Eigen value, channel 1 = smallest Eigen value). Default value is NULL. Supported types include: grayscale color image.

Definition at line 96 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ lightness

SoSFEnum SoEigenvaluesToStructurenessProcessing2d::lightness

The type of structure lightness to extract.

Use enum Lightness. Default is BRIGHT

Definition at line 115 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ noiseCutoff

SoSFFloat SoEigenvaluesToStructurenessProcessing2d::noiseCutoff

Noise scale factor.

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

Definition at line 142 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ outImage

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoEigenvaluesToStructurenessProcessing2d::outImage

Output image.

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

Definition at line 148 of file SoEigenvaluesToStructurenessProcessing2d.h.

◆ structureType

SoSFEnum SoEigenvaluesToStructurenessProcessing2d::structureType

Shape of structures to extract.

Use enum StructureType. Default is ROD

Definition at line 134 of file SoEigenvaluesToStructurenessProcessing2d.h.

The documentation for this class was generated from the following file: