ITK  4.13.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions | Private Attributes | List of all members
itk::WatershedImageFilter< TInputImage > Class Template Reference

#include <itkWatershedImageFilter.h>

+ Inheritance diagram for itk::WatershedImageFilter< TInputImage >:
+ Collaboration diagram for itk::WatershedImageFilter< TInputImage >:

Detailed Description

template<typename TInputImage>
class itk::WatershedImageFilter< TInputImage >

A low-level image analysis algorithm that automatically produces a hierarchy of segmented, labeled images from a scalar-valued image input.

Overview and terminology
This filter implements a non-streaming version of an image segmentation algorithm commonly known as "watershed segmentation". Watershed segmentation gets its name from the manner in which the algorithm segments regions into catchment basins. If a function $ f $ is a continuous height function defined over an image domain, then a catchment basin is defined as the set of points whose paths of steepest descent terminate at the same local minimum of $ f $.
The choice of height function (input) depends on the application, and the basic watershed algorithm operates independently of that choice. For intensity-based image data, you might typically use some sort of gradient magnitude calculation as input. (see itk::GradientMagnitudeImageFilter)
The watershed algorithm proceeds in several steps. First, an initial classification of all points into catchment basin regions is done by tracing each point down its path of steepest descent to a local minima. Next, neighboring regions and the boundaries between them are analyzed according to some saliency measure (such as minimum boundary height) to produce a tree of merges among adjacent regions. These merges occur at different maximum saliency values. The collective set of all possible merges up to a specified saliency "flood level" is referred to in this documentation as a "merge tree". Metaphorically, the flood level is a value that reflects the amount of precipitation that is rained into the catchment basins. As the flood level rises, boundaries between adjacent segments erode and those segments merge. The minimum value of the flood level is zero and the maximum value is the difference between the highest and lowest values in the input image.
Note that once the initial analysis and segmentation is done to produce the merge tree, it is trivial to produce a hierarchy of labeled images in constant time. The complexity of the algorithm is in the computation of the merge tree. Once that tree has been created, the initial segmented image can be relabeled to reflect any maximum saliency value found in the tree by simply identifying a subset of segment merges from the tree.
Implementational details
This filter is a wrapper for several lower level process objects (watershed algorithm components in the namespace "watershed"). For a more complete picture of the implementation, refer to the documentation of those components. The component classes were designed to operate in either a data-streaming or a non-data-streaming mode. The pipeline constructed in this class' GenerateData() method does not support streaming, but is the common use case for the components.
Description of the input to this filter
The input to this filter is a scalar itk::Image of any dimensionality. This input image is assumed to represent some sort of height function or edge map based on the original image that you want to segment (such as would be produced by itk::GradientMagnitudeImageFilter). This filter does not do any pre-processing on its input other than a thresholding step. The algorithm does not explicitly require that the input be of any particular data type, but floating point or double precision data is recommended.
The recommended pre-processing for scalar image input to this algorithm is to use one of the itk::AnisotropicDiffusionImageFilter subclasses to smooth the original image and then perform some sort of edge calculation based on gradients or curvature.
Description of the output of this filter
This filter will produce an itk::Image of IdentifierType integer type and of the same dimensionality as the input image. The IdentifierType output image is referred to as the "labeled image" in this documentation. Each pixel in the image is assigned an IdentifierType integer label that groups it within a connected region.
Some notes on filter parameters
Two parameters control the output of this filter, Threshold and Level. The units of both parameters are percentage points of the maximum height value in the input.
Threshold is used to set the absolute minimum height value used during processing. Raising this threshold percentage effectively decreases the number of local minima in the input, resulting in an initial segmentation with fewer regions. The assumption is that the shallow regions that thresholding removes are of of less interest.
The Level parameter controls the depth of metaphorical flooding of the image. That is, it sets the maximum saliency value of interest in the result. Raising and lowering the Level influences the number of segments in the basic segmentation that are merged to produce the final output. A level of 1.0 is analogous to flooding the image up to a depth that is 100 percent of the maximum value in the image. A level of 0.0 produces the basic segmentation, which will typically be very oversegmented. Level values of interest are typically low (i.e. less than about 0.40 or 40% ), since higher values quickly start to undersegment the image.
The Level parameter can be used to create a hierarchy of output images in constant time once an initial segmentation is done. A typical scenario might go like this: For the initial execution of the filter, set the Level to the maximum saliency value that you anticipate might be of interest. Once the initial Update() of this process object has finished, the Level can be manipulated anywhere below the initial setting without triggering a full update of the segmentation mini-pipeline. All that is now be required to produce the new output is a simple relabeling of the output image.
Threshold and Level parameters are controlled through the class' Get/SetThreshold() and Get/SetLevel() methods.
Notes on streaming the watershed segmentation code
Coming soon... 12/06/01
Examples:
Examples/Segmentation/WatershedSegmentation1.cxx, Examples/Segmentation/WatershedSegmentation2.cxx, and WikiExamples/Segmentation/WatershedImageFilter.cxx.

Definition at line 150 of file itkWatershedImageFilter.h.

Public Types

typedef InputImageType::IndexType IndexType
 
typedef TInputImage InputImageType
 
typedef Image< IdentifierType,
itkGetStaticConstMacro(ImageDimension) > 
OutputImageType
 
typedef SmartPointer< SelfPointer
 
typedef InputImageType::RegionType RegionType
 
typedef InputImageType::PixelType ScalarType
 
typedef WatershedImageFilter Self
 
typedef InputImageType::SizeType SizeType
 
typedef ImageToImageFilter
< InputImageType,
OutputImageType
Superclass
 
- Public Types inherited from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >
typedef SmartPointer< const SelfConstPointer
 
typedef
InputImageType::ConstPointer 
InputImageConstPointer
 
typedef InputImageType::PixelType InputImagePixelType
 
typedef InputImageType::Pointer InputImagePointer
 
typedef InputImageType::RegionType InputImageRegionType
 
typedef TInputImage InputImageType
 
typedef
Superclass::OutputImagePixelType 
OutputImagePixelType
 
typedef
Superclass::OutputImageRegionType 
OutputImageRegionType
 
typedef SmartPointer< SelfPointer
 
typedef ImageToImageFilter Self
 
typedef ImageSource< Image
< IdentifierType,
TInputImage::ImageDimension > > 
Superclass
 
- Public Types inherited from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >
typedef SmartPointer< const SelfConstPointer
 
typedef
Superclass::DataObjectIdentifierType 
DataObjectIdentifierType
 
typedef DataObject::Pointer DataObjectPointer
 
typedef
Superclass::DataObjectPointerArraySizeType 
DataObjectPointerArraySizeType
 
typedef OutputImageType::PixelType OutputImagePixelType
 
typedef OutputImageType::Pointer OutputImagePointer
 
typedef OutputImageType::RegionType OutputImageRegionType
 
typedef Image< IdentifierType,
TInputImage::ImageDimension > 
OutputImageType
 
typedef SmartPointer< SelfPointer
 
typedef ImageSource Self
 
typedef ProcessObject Superclass
 
- Public Types inherited from itk::ProcessObject
typedef SmartPointer< const SelfConstPointer
 
typedef
DataObject::DataObjectIdentifierType 
DataObjectIdentifierType
 
typedef DataObject::Pointer DataObjectPointer
 
typedef std::vector
< DataObjectPointer
DataObjectPointerArray
 
typedef
DataObjectPointerArray::size_type 
DataObjectPointerArraySizeType
 
typedef MultiThreader MultiThreaderType
 
typedef std::vector
< DataObjectIdentifierType
NameArray
 
typedef SmartPointer< SelfPointer
 
typedef ProcessObject Self
 
typedef Object Superclass
 
- Public Types inherited from itk::Object
typedef SmartPointer< const SelfConstPointer
 
typedef SmartPointer< SelfPointer
 
typedef Object Self
 
typedef LightObject Superclass
 
- Public Types inherited from itk::LightObject
typedef SmartPointer< const SelfConstPointer
 
typedef SmartPointer< SelfPointer
 
typedef LightObject Self
 

Public Member Functions

virtual ::itk::LightObject::Pointer CreateAnother () const
 
void EnlargeOutputRequestedRegion (DataObject *data) override
 
void GenerateData () override
 
virtual const char * GetNameOfClass () const
 
watershed::SegmentTreeGenerator
< ScalarType >
::SegmentTreeType * 
GetSegmentTree ()
 
void SetInput (const InputImageType *input) override
 
virtual void SetInput (unsigned int i, const TInputImage *image) override
 
void SetThreshold (double)
 
virtual double GetThreshold () const
 
void SetLevel (double)
 
virtual double GetLevel () const
 
watershed::Segmenter
< InputImageType >
::OutputImageType
GetBasicSegmentation ()
 
- Public Member Functions inherited from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >
const InputImageTypeGetInput () const
 
const InputImageTypeGetInput (unsigned int idx) const
 
virtual void PopBackInput () override
 
virtual void PopFrontInput () override
 
virtual void PushBackInput (const InputImageType *image)
 
virtual void PushFrontInput (const InputImageType *image)
 
virtual void SetCoordinateTolerance (double _arg)
 
virtual double GetCoordinateTolerance () const
 
virtual void SetDirectionTolerance (double _arg)
 
virtual double GetDirectionTolerance () const
 
- Public Member Functions inherited from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >
OutputImageTypeGetOutput (unsigned int idx)
 
virtual void GraftNthOutput (unsigned int idx, DataObject *output)
 
virtual void GraftOutput (const DataObjectIdentifierType &key, DataObject *output)
 
OutputImageTypeGetOutput ()
 
const OutputImageTypeGetOutput () const
 
virtual void GraftOutput (DataObject *output)
 
virtual
ProcessObject::DataObjectPointer 
MakeOutput (ProcessObject::DataObjectPointerArraySizeType idx) override
 
virtual
ProcessObject::DataObjectPointer 
MakeOutput (const ProcessObject::DataObjectIdentifierType &) override
 
- Public Member Functions inherited from itk::ProcessObject
virtual void AbortGenerateDataOff ()
 
virtual void AbortGenerateDataOn ()
 
virtual const bool & GetAbortGenerateData () const
 
DataObjectPointerArray GetIndexedInputs ()
 
DataObjectPointerArray GetIndexedOutputs ()
 
NameArray GetInputNames () const
 
DataObjectPointerArray GetInputs ()
 
MultiThreaderTypeGetMultiThreader () const
 
DataObjectPointerArraySizeType GetNumberOfIndexedInputs () const
 
DataObjectPointerArraySizeType GetNumberOfIndexedOutputs () const
 
DataObjectPointerArraySizeType GetNumberOfInputs () const
 
DataObjectPointerArraySizeType GetNumberOfOutputs () const
 
virtual
DataObjectPointerArraySizeType 
GetNumberOfValidRequiredInputs () const
 
NameArray GetOutputNames () const
 
DataObjectPointerArray GetOutputs ()
 
virtual const float & GetProgress () const
 
NameArray GetRequiredInputNames () const
 
bool HasInput (const DataObjectIdentifierType &key) const
 
bool HasOutput (const DataObjectIdentifierType &key) const
 
virtual void PropagateRequestedRegion (DataObject *output)
 
virtual void ResetPipeline ()
 
virtual void SetAbortGenerateData (bool _arg)
 
virtual void Update ()
 
virtual void UpdateLargestPossibleRegion ()
 
virtual void UpdateOutputData (DataObject *output)
 
virtual void UpdateOutputInformation ()
 
void UpdateProgress (float progress)
 
void SetProgress (float progress)
 
virtual void SetReleaseDataFlag (bool flag)
 
virtual bool GetReleaseDataFlag () const
 
void ReleaseDataFlagOn ()
 
void ReleaseDataFlagOff ()
 
virtual void SetReleaseDataBeforeUpdateFlag (bool _arg)
 
virtual const bool & GetReleaseDataBeforeUpdateFlag () const
 
virtual void ReleaseDataBeforeUpdateFlagOn ()
 
virtual void ReleaseDataBeforeUpdateFlagOff ()
 
virtual void SetNumberOfThreads (ThreadIdType _arg)
 
virtual const ThreadIdTypeGetNumberOfThreads () const
 
- Public Member Functions inherited from itk::Object
unsigned long AddObserver (const EventObject &event, Command *)
 
unsigned long AddObserver (const EventObject &event, Command *) const
 
virtual void DebugOff () const
 
virtual void DebugOn () const
 
CommandGetCommand (unsigned long tag)
 
bool GetDebug () const
 
MetaDataDictionaryGetMetaDataDictionary ()
 
const MetaDataDictionaryGetMetaDataDictionary () const
 
virtual ModifiedTimeType GetMTime () const
 
virtual const TimeStampGetTimeStamp () const
 
bool HasObserver (const EventObject &event) const
 
void InvokeEvent (const EventObject &)
 
void InvokeEvent (const EventObject &) const
 
virtual void Modified () const
 
virtual void Register () const override
 
void RemoveAllObservers ()
 
void RemoveObserver (unsigned long tag)
 
void SetDebug (bool debugFlag) const
 
void SetMetaDataDictionary (const MetaDataDictionary &rhs)
 
virtual void SetReferenceCount (int) override
 
virtual void UnRegister () const noexceptoverride
 
virtual void SetObjectName (std::string _arg)
 
virtual const std::string & GetObjectName () const
 
- Public Member Functions inherited from itk::LightObject
virtual void Delete ()
 
virtual int GetReferenceCount () const
 
 itkCloneMacro (Self)
 
void Print (std::ostream &os, Indent indent=0) const
 

Static Public Member Functions

static Pointer New ()
 
- Static Public Member Functions inherited from itk::Object
static bool GetGlobalWarningDisplay ()
 
static void GlobalWarningDisplayOff ()
 
static void GlobalWarningDisplayOn ()
 
static Pointer New ()
 
static void SetGlobalWarningDisplay (bool flag)
 
- Static Public Member Functions inherited from itk::LightObject
static void BreakOnError ()
 
static Pointer New ()
 

Static Public Attributes

static const unsigned int ImageDimension = TInputImage::ImageDimension
 
- Static Public Attributes inherited from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >
static const unsigned int InputImageDimension
 
static const unsigned int OutputImageDimension
 
- Static Public Attributes inherited from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >
static const unsigned int OutputImageDimension
 

Protected Member Functions

virtual void PrepareOutputs () override
 
void PrintSelf (std::ostream &os, Indent indent) const override
 
 WatershedImageFilter ()
 
virtual ~WatershedImageFilter () override
 
- Protected Member Functions inherited from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >
virtual void CallCopyInputRegionToOutputRegion (OutputImageRegionType &destRegion, const InputImageRegionType &srcRegion)
 
virtual void CallCopyOutputRegionToInputRegion (InputImageRegionType &destRegion, const OutputImageRegionType &srcRegion)
 
virtual void GenerateInputRequestedRegion () override
 
 ImageToImageFilter ()
 
virtual void VerifyInputInformation () override
 
 ~ImageToImageFilter () override
 
void PushBackInput (const DataObject *input) override
 
void PushFrontInput (const DataObject *input) override
 
- Protected Member Functions inherited from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >
virtual void AfterThreadedGenerateData ()
 
virtual void AllocateOutputs ()
 
virtual void BeforeThreadedGenerateData ()
 
virtual const
ImageRegionSplitterBase
GetImageRegionSplitter () const
 
 ImageSource ()
 
virtual unsigned int SplitRequestedRegion (unsigned int i, unsigned int pieces, OutputImageRegionType &splitRegion)
 
virtual void ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)
 
virtual ~ImageSource () override
 
- Protected Member Functions inherited from itk::ProcessObject
virtual void AddInput (DataObject *input)
 
void AddOptionalInputName (const DataObjectIdentifierType &)
 
void AddOptionalInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx)
 
virtual void AddOutput (DataObject *output)
 
bool AddRequiredInputName (const DataObjectIdentifierType &)
 
bool AddRequiredInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx)
 
virtual void CacheInputReleaseDataFlags ()
 
virtual void GenerateOutputInformation ()
 
virtual void GenerateOutputRequestedRegion (DataObject *output)
 
DataObjectGetInput (const DataObjectIdentifierType &key)
 
const DataObjectGetInput (const DataObjectIdentifierType &key) const
 
virtual const
DataObjectPointerArraySizeType
GetNumberOfRequiredInputs () const
 
virtual const
DataObjectPointerArraySizeType
GetNumberOfRequiredOutputs () const
 
bool IsIndexedInputName (const DataObjectIdentifierType &) const
 
bool IsIndexedOutputName (const DataObjectIdentifierType &) const
 
bool IsRequiredInputName (const DataObjectIdentifierType &) const
 
 itkLegacyMacro (virtual void RemoveOutput(DataObject *output))
 
 itkLegacyMacro (void SetNumberOfOutputs(DataObjectPointerArraySizeType num))
 
 itkLegacyMacro (virtual void RemoveInput(DataObject *input))
 
 itkLegacyMacro (void SetNumberOfInputs(DataObjectPointerArraySizeType num))
 
DataObjectPointerArraySizeType MakeIndexFromInputName (const DataObjectIdentifierType &name) const
 
DataObjectPointerArraySizeType MakeIndexFromOutputName (const DataObjectIdentifierType &name) const
 
DataObjectIdentifierType MakeNameFromInputIndex (DataObjectPointerArraySizeType idx) const
 
DataObjectIdentifierType MakeNameFromOutputIndex (DataObjectPointerArraySizeType idx) const
 
 ProcessObject ()
 
virtual void PropagateResetPipeline ()
 
virtual void ReleaseInputs ()
 
virtual void RemoveInput (const DataObjectIdentifierType &key)
 
virtual void RemoveInput (DataObjectPointerArraySizeType)
 
virtual void RemoveOutput (const DataObjectIdentifierType &key)
 
virtual void RemoveOutput (DataObjectPointerArraySizeType idx)
 
bool RemoveRequiredInputName (const DataObjectIdentifierType &)
 
virtual void RestoreInputReleaseDataFlags ()
 
virtual void SetInput (const DataObjectIdentifierType &key, DataObject *input)
 
virtual void SetNthInput (DataObjectPointerArraySizeType num, DataObject *input)
 
virtual void SetNthOutput (DataObjectPointerArraySizeType num, DataObject *output)
 
void SetNumberOfIndexedInputs (DataObjectPointerArraySizeType num)
 
void SetNumberOfIndexedOutputs (DataObjectPointerArraySizeType num)
 
virtual void SetNumberOfRequiredInputs (DataObjectPointerArraySizeType)
 
virtual void SetNumberOfRequiredOutputs (DataObjectPointerArraySizeType _arg)
 
virtual void SetOutput (const DataObjectIdentifierType &key, DataObject *output)
 
virtual void SetPrimaryInput (DataObject *input)
 
virtual void SetPrimaryOutput (DataObject *output)
 
void SetRequiredInputNames (const NameArray &)
 
virtual void VerifyPreconditions ()
 
 ~ProcessObject () override
 
DataObjectGetInput (DataObjectPointerArraySizeType idx)
 
const DataObjectGetInput (DataObjectPointerArraySizeType idx) const
 
DataObjectGetPrimaryInput ()
 
const DataObjectGetPrimaryInput () const
 
virtual void SetPrimaryInputName (const DataObjectIdentifierType &key)
 
virtual const char * GetPrimaryInputName (void) const
 
DataObjectGetOutput (const DataObjectIdentifierType &key)
 
const DataObjectGetOutput (const DataObjectIdentifierType &key) const
 
virtual void SetPrimaryOutputName (const DataObjectIdentifierType &key)
 
virtual const char * GetPrimaryOutputName (void) const
 
DataObjectGetOutput (DataObjectPointerArraySizeType idx)
 
const DataObjectGetOutput (DataObjectPointerArraySizeType idx) const
 
DataObjectGetPrimaryOutput ()
 
const DataObjectGetPrimaryOutput () const
 
- Protected Member Functions inherited from itk::Object
 Object ()
 
bool PrintObservers (std::ostream &os, Indent indent) const
 
virtual void SetTimeStamp (const TimeStamp &time)
 
virtual ~Object () override
 
- Protected Member Functions inherited from itk::LightObject
virtual LightObject::Pointer InternalClone () const
 
 LightObject ()
 
virtual void PrintHeader (std::ostream &os, Indent indent) const
 
virtual void PrintTrailer (std::ostream &os, Indent indent) const
 
virtual ~LightObject ()
 

Private Attributes

TimeStamp m_GenerateDataMTime
 
bool m_InputChanged
 
double m_Level
 
bool m_LevelChanged
 
unsigned long m_ObserverTag
 
watershed::Relabeler
< ScalarType,
itkGetStaticConstMacro(ImageDimension) >
::Pointer 
m_Relabeler
 
watershed::Segmenter
< InputImageType >::Pointer 
m_Segmenter
 
double m_Threshold
 
bool m_ThresholdChanged
 
watershed::SegmentTreeGenerator
< ScalarType >::Pointer 
m_TreeGenerator
 

Additional Inherited Members

- Protected Types inherited from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >
typedef
ImageToImageFilterDetail::ImageRegionCopier
< itkGetStaticConstMacro(OutputImageDimension),
itkGetStaticConstMacro(InputImageDimension) > 
InputToOutputRegionCopierType
 
typedef
ImageToImageFilterDetail::ImageRegionCopier
< itkGetStaticConstMacro(InputImageDimension),
itkGetStaticConstMacro(OutputImageDimension) > 
OutputToInputRegionCopierType
 
- Static Protected Member Functions inherited from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >
static const
ImageRegionSplitterBase
GetGlobalDefaultSplitter ()
 
static ITK_THREAD_RETURN_TYPE ThreaderCallback (void *arg)
 
- Protected Attributes inherited from itk::ProcessObject
TimeStamp m_OutputInformationMTime
 
bool m_Updating
 
- Protected Attributes inherited from itk::LightObject
AtomicInt< int > m_ReferenceCount
 

Member Typedef Documentation

template<typename TInputImage >
typedef InputImageType::IndexType itk::WatershedImageFilter< TInputImage >::IndexType

Definition at line 171 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef TInputImage itk::WatershedImageFilter< TInputImage >::InputImageType

The type of input image.

Definition at line 159 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef Image< IdentifierType, itkGetStaticConstMacro(ImageDimension) > itk::WatershedImageFilter< TInputImage >::OutputImageType

The type of output image.

Definition at line 166 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef SmartPointer< Self > itk::WatershedImageFilter< TInputImage >::Pointer

Smart pointer typedef support

Definition at line 180 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef InputImageType::RegionType itk::WatershedImageFilter< TInputImage >::RegionType

Other convenient typedefs

Definition at line 169 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef InputImageType::PixelType itk::WatershedImageFilter< TInputImage >::ScalarType

Typedef support for the input image scalar value type.

Definition at line 177 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef WatershedImageFilter itk::WatershedImageFilter< TInputImage >::Self

Standard "Self" typedef.

Definition at line 156 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef InputImageType::SizeType itk::WatershedImageFilter< TInputImage >::SizeType

Definition at line 170 of file itkWatershedImageFilter.h.

template<typename TInputImage >
typedef ImageToImageFilter< InputImageType, OutputImageType > itk::WatershedImageFilter< TInputImage >::Superclass

Standard super class typedef support.

Definition at line 174 of file itkWatershedImageFilter.h.

Constructor & Destructor Documentation

template<typename TInputImage >
itk::WatershedImageFilter< TInputImage >::WatershedImageFilter ( )
protected
template<typename TInputImage >
virtual itk::WatershedImageFilter< TInputImage >::~WatershedImageFilter ( )
inlineoverrideprotectedvirtual

Definition at line 263 of file itkWatershedImageFilter.h.

Member Function Documentation

template<typename TInputImage >
virtual::itk::LightObject::Pointer itk::WatershedImageFilter< TInputImage >::CreateAnother ( ) const
virtual

Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.

Reimplemented from itk::Object.

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::EnlargeOutputRequestedRegion ( DataObject )
overridevirtual

Give the process object a chance to indictate that it will produce more output than it was requested to produce. For example, many imaging filters must compute the entire output at once or can only produce output in complete slices. Such filters cannot handle smaller requested regions. These filters must provide an implementation of this method, setting the output requested region to the size they will produce. By default, a process object does not modify the size of the output requested region.

Reimplemented from itk::ProcessObject.

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::GenerateData ( )
overridevirtual

Standard process object method. This filter is not multithreaded.

Reimplemented from itk::ImageSource< Image< IdentifierType, TInputImage::ImageDimension > >.

template<typename TInputImage >
watershed::Segmenter< InputImageType >::OutputImageType* itk::WatershedImageFilter< TInputImage >::GetBasicSegmentation ( )
inline

Get the basic segmentation from the Segmenter member filter.

Definition at line 231 of file itkWatershedImageFilter.h.

References itk::ProcessObject::Update().

template<typename TInputImage >
virtual double itk::WatershedImageFilter< TInputImage >::GetLevel ( ) const
virtual

Set/Get the input thresholding parameter. Units are a percentage of the maximum depth in the image.

template<typename TInputImage >
virtual const char* itk::WatershedImageFilter< TInputImage >::GetNameOfClass ( ) const
virtual

Run-time type information (and related methods)

Reimplemented from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >.

template<typename TInputImage >
watershed::SegmentTreeGenerator< ScalarType >::SegmentTreeType* itk::WatershedImageFilter< TInputImage >::GetSegmentTree ( )
inline

Get the segmentation tree from from the TreeGenerator member filter.

Definition at line 240 of file itkWatershedImageFilter.h.

References itk::watershed::SegmentTreeGenerator< TScalar >::GetOutputSegmentTree().

template<typename TInputImage >
virtual double itk::WatershedImageFilter< TInputImage >::GetThreshold ( ) const
virtual

Set/Get the input thresholding parameter. Units are a percentage of the maximum depth in the image.

template<typename TInputImage >
static Pointer itk::WatershedImageFilter< TInputImage >::New ( )
static

Method for creation through the object factory.

template<typename TInputImage >
virtual void itk::WatershedImageFilter< TInputImage >::PrepareOutputs ( )
overrideprotectedvirtual

An opportunity to Allocate/Deallocate bulk data.

Reimplemented from itk::ProcessObject.

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::PrintSelf ( std::ostream &  os,
Indent  indent 
) const
overrideprotectedvirtual

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 itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >.

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::SetInput ( const InputImageType input)
inlineoverridevirtual

Set/Get the input thresholding parameter. Units are a percentage of the maximum depth in the image.

Reimplemented from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >.

Definition at line 194 of file itkWatershedImageFilter.h.

References itk::ProcessObject::SetNthInput().

template<typename TInputImage >
virtual void itk::WatershedImageFilter< TInputImage >::SetInput ( unsigned int  i,
const TInputImage *  image 
)
inlineoverridevirtual

Set/Get the input thresholding parameter. Units are a percentage of the maximum depth in the image.

Reimplemented from itk::ImageToImageFilter< TInputImage, Image< IdentifierType, TInputImage::ImageDimension > >.

Definition at line 209 of file itkWatershedImageFilter.h.

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::SetLevel ( double  )

Set/Get the flood level for generating the merge tree from the initial segmentation

template<typename TInputImage >
void itk::WatershedImageFilter< TInputImage >::SetThreshold ( double  )

Set/Get the input thresholding parameter. Units are a percentage of the maximum depth in the image.

Member Data Documentation

template<typename TInputImage >
const unsigned int itk::WatershedImageFilter< TInputImage >::ImageDimension = TInputImage::ImageDimension
static

Dimension of the input and output images.

Definition at line 163 of file itkWatershedImageFilter.h.

template<typename TInputImage >
TimeStamp itk::WatershedImageFilter< TInputImage >::m_GenerateDataMTime
private

Definition at line 300 of file itkWatershedImageFilter.h.

template<typename TInputImage >
bool itk::WatershedImageFilter< TInputImage >::m_InputChanged
private

Definition at line 298 of file itkWatershedImageFilter.h.

template<typename TInputImage >
double itk::WatershedImageFilter< TInputImage >::m_Level
private

The percentage of the maximum saliency value among adjacencies in the segments of the initial segmentation to which "flooding" of the image should occur. A tree of segment merges is calculated up to this level.

Definition at line 282 of file itkWatershedImageFilter.h.

template<typename TInputImage >
bool itk::WatershedImageFilter< TInputImage >::m_LevelChanged
private

Definition at line 296 of file itkWatershedImageFilter.h.

template<typename TInputImage >
unsigned long itk::WatershedImageFilter< TInputImage >::m_ObserverTag
private

Definition at line 294 of file itkWatershedImageFilter.h.

template<typename TInputImage >
watershed::Relabeler< ScalarType, itkGetStaticConstMacro(ImageDimension) >::Pointer itk::WatershedImageFilter< TInputImage >::m_Relabeler
private

Definition at line 292 of file itkWatershedImageFilter.h.

template<typename TInputImage >
watershed::Segmenter< InputImageType >::Pointer itk::WatershedImageFilter< TInputImage >::m_Segmenter
private

The component parts of the segmentation algorithm. These objects must save state between calls to GenerateData() so that the computationally expensive execution of segment tree generation is not unnecessarily repeated.

Definition at line 288 of file itkWatershedImageFilter.h.

template<typename TInputImage >
double itk::WatershedImageFilter< TInputImage >::m_Threshold
private

A Percentage of the maximum depth (max - min pixel value) in the input image. This percentage will be used to threshold the minimum values in the image.

Definition at line 271 of file itkWatershedImageFilter.h.

template<typename TInputImage >
bool itk::WatershedImageFilter< TInputImage >::m_ThresholdChanged
private

Definition at line 297 of file itkWatershedImageFilter.h.

template<typename TInputImage >
watershed::SegmentTreeGenerator< ScalarType >::Pointer itk::WatershedImageFilter< TInputImage >::m_TreeGenerator
private

Definition at line 290 of file itkWatershedImageFilter.h.


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