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vtkSubPixelPositionEdgels Class Reference

adjust edgel locations based on gradients. More...

#include <vtkSubPixelPositionEdgels.h>

Inheritance diagram for vtkSubPixelPositionEdgels:

[legend]Collaboration diagram for vtkSubPixelPositionEdgels:

[legend]List of all members.

Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
void	SetGradMaps (vtkStructuredPoints *gm)
vtkStructuredPoints *	GetGradMaps ()
virtual void	SetTargetFlag (int)
virtual int	GetTargetFlag ()
virtual void	TargetFlagOn ()
virtual void	TargetFlagOff ()
virtual void	SetTargetValue (float)
virtual float	GetTargetValue ()
Static Public Methods
vtkSubPixelPositionEdgels *	New ()
int	IsTypeOf (const char *type)
vtkSubPixelPositionEdgels *	SafeDownCast (vtkObject *o)
Protected Methods
	vtkSubPixelPositionEdgels ()
	~vtkSubPixelPositionEdgels ()
	vtkSubPixelPositionEdgels (const vtkSubPixelPositionEdgels &)
void	operator= (const vtkSubPixelPositionEdgels &)
void	Execute ()
void	Move (int xdim, int ydim, int zdim, int x, int y, float *img, vtkVectors *inVecs, float *result, int z, float *aspect, float *resultNormal)
Protected Attributes
int	TargetFlag
float	TargetValue

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Detailed Description

adjust edgel locations based on gradients.

Date:

2000/12/10 20:08:54

Revision:

1.25

vtkSubPixelPositionEdgels is a filter that takes a series of linked edgels (digital curves) and gradient maps as input. It then adjusts the edgel locations based on the gradient data. Specifically, the algorithm first determines the neighboring gradient magnitudes of an edgel using simple interpolation of its neighbors. It then fits the following three data points: negative gradient direction gradient magnitude, edgel gradient magnitude and positive gradient direction gradient magnitude to a quadratic function. It then solves this quadratic to find the maximum gradient location along the gradient orientation. It then modifies the edgels location along the gradient orientation to the calculated maximum location. This algorithm does not adjust an edgel in the direction orthogonal to its gradient vector.

See also:

vtkImage vtkImageGradient vtkLinkEdgels

Examples:

vtkSubPixelPositionEdgels (examples)

Definition at line 71 of file vtkSubPixelPositionEdgels.h.

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Constructor & Destructor Documentation

vtkSubPixelPositionEdgels::vtkSubPixelPositionEdgels (    )  [protected]

vtkSubPixelPositionEdgels::~vtkSubPixelPositionEdgels (    )  [protected]

vtkSubPixelPositionEdgels::vtkSubPixelPositionEdgels (  const vtkSubPixelPositionEdgels &    )  [inline, protected]

Definition at line 93 of file vtkSubPixelPositionEdgels.h.

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Member Function Documentation

vtkSubPixelPositionEdgels* vtkSubPixelPositionEdgels::New (    )  [static]

Instantiate object with no start, end, or progress methods. Reimplemented from vtkPolyDataSource.

virtual const char* vtkSubPixelPositionEdgels::GetClassName (    )  [virtual]

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter.

int vtkSubPixelPositionEdgels::IsTypeOf (  const char *    type )  [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter.

virtual int vtkSubPixelPositionEdgels::IsA (  const char *    type )  [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter.

vtkSubPixelPositionEdgels* vtkSubPixelPositionEdgels::SafeDownCast (  vtkObject *    o )  [static]

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter.

void vtkSubPixelPositionEdgels::PrintSelf (  ostream &    os, vtkIndent    indent )  [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes. Reimplemented from vtkSource.

void vtkSubPixelPositionEdgels::SetGradMaps (  vtkStructuredPoints *    gm )

Set/Get the gradient data for doing the position adjustments.

vtkStructuredPoints* vtkSubPixelPositionEdgels::GetGradMaps (    )

virtual void vtkSubPixelPositionEdgels::SetTargetFlag (  int    )  [virtual]

These methods can make the positioning look for a target scalar value instead of looking for a maximum.

virtual int vtkSubPixelPositionEdgels::GetTargetFlag (    )  [virtual]

virtual void vtkSubPixelPositionEdgels::TargetFlagOn (    )  [virtual]

virtual void vtkSubPixelPositionEdgels::TargetFlagOff (    )  [virtual]

virtual void vtkSubPixelPositionEdgels::SetTargetValue (  float    )  [virtual]

virtual float vtkSubPixelPositionEdgels::GetTargetValue (    )  [virtual]

void vtkSubPixelPositionEdgels::operator= (  const vtkSubPixelPositionEdgels &    )  [inline, protected]

Definition at line 94 of file vtkSubPixelPositionEdgels.h.

void vtkSubPixelPositionEdgels::Execute (    )  [protected, virtual]

Reimplemented from vtkSource.

void vtkSubPixelPositionEdgels::Move (  int    xdim, int    ydim, int    zdim, int    x, int    y, float *    img, vtkVectors *    inVecs, float *    result, int    z, float *    aspect, float *    resultNormal )  [protected]

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Member Data Documentation

int vtkSubPixelPositionEdgels::TargetFlag [protected]

Definition at line 102 of file vtkSubPixelPositionEdgels.h.

float vtkSubPixelPositionEdgels::TargetValue [protected]

Definition at line 103 of file vtkSubPixelPositionEdgels.h.

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

• graphics/vtkSubPixelPositionEdgels.h

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