This filter finds the closest pixel to the zero-crossings (sign changes) in a signed itk::Image. More...

#include <itkZeroCrossingImageFilter.h>

Inheritance diagram for itk::ZeroCrossingImageFilter< TInputImage, TOutputImage >:

Collaboration diagram for itk::ZeroCrossingImageFilter< TInputImage, TOutputImage >:

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef TInputImage::PixelType	InputImagePixelType
typedef TInputImage	InputImageType
typedef TOutputImage::PixelType	OutputImagePixelType
typedef TOutputImage::RegionType	OutputImageRegionType
typedef TOutputImage	OutputImageType
typedef SmartPointer< Self >	Pointer
typedef ZeroCrossingImageFilter	Self
typedef ImageToImageFilter < TInputImage, TOutputImage >	Superclass
Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
virtual void	GenerateInputRequestedRegion () throw ( InvalidRequestedRegionError )
virtual const char *	GetNameOfClass () const
	typedef (Concept::SameDimension< ImageDimension, OutputImageDimension >) SameDimensionCheck
	typedef (Concept::EqualityComparable< OutputImagePixelType >) OutputEqualityComparableCheck
	typedef (Concept::OStreamWritable< OutputImagePixelType >) OutputOStreamWritableCheck
	typedef (Concept::Comparable< InputImagePixelType >) InputComparableCheck

virtual void	SetForegroundValue (OutputImagePixelType _arg)
virtual OutputImagePixelType	GetForegroundValue () const

virtual void	SetBackgroundValue (OutputImagePixelType _arg)
virtual OutputImagePixelType	GetBackgroundValue () const
Static Public Member Functions
static Pointer	New ()
Static Public Attributes

static const unsigned int	ImageDimension = TInputImage::ImageDimension
static const unsigned int	OutputImageDimension = TOutputImage::ImageDimension
Protected Member Functions
void	PrintSelf (std::ostream &os, Indent indent) const
	ZeroCrossingImageFilter ()
	~ZeroCrossingImageFilter ()
Protected Attributes
OutputImagePixelType	m_BackgroundValue
OutputImagePixelType	m_ForegroundValue
void	ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)
	ZeroCrossingImageFilter (const Self &)
void	operator= (const Self &)

Detailed Description

template<class TInputImage, class TOutputImage>
class itk::ZeroCrossingImageFilter< TInputImage, TOutputImage >

This filter finds the closest pixel to the zero-crossings (sign changes) in a signed itk::Image.

Pixels closest to zero-crossings are labeled with a foreground value. All other pixels are marked with a background value. The algorithm works by detecting differences in sign among neighbors using city-block style connectivity (4-neighbors in 2d, 6-neighbors in 3d, etc.).

Inputs and Outputs: The input to this filter is an itk::Image of arbitrary dimension. The algorithm assumes a signed data type (zero-crossings are not defined for unsigned data types), and requires that operator>, operator<, operator==, and operator!= are defined.

: The output of the filter is a binary, labeled image of user-specified type. By default, zero-crossing pixels are labeled with a default ``foreground'' value of itk::NumericTraits<OutputDataType>::One, where OutputDataType is the data type of the output image. All other pixels are labeled with a default ``background'' value of itk::NumericTraits<OutputDataType>::Zero.

Parameters: There are two parameters for this filter. ForegroundValue is the value that marks zero-crossing pixels. The BackgroundValue is the value given to all other pixels.

See also:: Image; Neighborhood; NeighborhoodOperator; NeighborhoodIterator

Wiki Examples:

All Examples

Find zero crossings in a signed image

Definition at line 63 of file itkZeroCrossingImageFilter.h.