Compute the histogram for an image. More...

#include <vtkImageHistogram.h>

Inheritance diagram for vtkImageHistogram:

Collaboration diagram for vtkImageHistogram:

Public Types
typedef vtkThreadedImageAlgorithm	Superclass

enum	{ Linear = 0, Log = 1, Sqrt = 2 }
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
vtkIdTypeArray *	GetHistogram ()
vtkIdType	GetTotal ()

virtual void	SetActiveComponent (int)
virtual int	GetActiveComponent ()

virtual void	SetAutomaticBinning (int)
virtual void	AutomaticBinningOn ()
virtual void	AutomaticBinningOff ()
virtual int	GetAutomaticBinning ()

virtual void	SetMaximumNumberOfBins (int)
virtual int	GetMaximumNumberOfBins ()

virtual void	SetNumberOfBins (int)
virtual int	GetNumberOfBins ()

virtual void	SetBinOrigin (double)
virtual double	GetBinOrigin ()

virtual void	SetBinSpacing (double)
virtual double	GetBinSpacing ()

void	SetStencil (vtkImageStencilData *stencil)
vtkImageStencilData *	GetStencil ()

virtual void	SetGenerateHistogramImage (int)
virtual void	GenerateHistogramImageOn ()
virtual void	GenerateHistogramImageOff ()
virtual int	GetGenerateHistogramImage ()

virtual void	SetHistogramImageSize (int, int)
void	SetHistogramImageSize (int[2])
virtual int *	GetHistogramImageSize ()
virtual void	GetHistogramImageSize (int &, int &)
virtual void	GetHistogramImageSize (int[2])

virtual void	SetHistogramImageScale (int)
void	SetHistogramImageScaleToLinear ()
void	SetHistogramImageScaleToLog ()
void	SetHistogramImageScaleToSqrt ()
virtual int	GetHistogramImageScale ()
const char *	GetHistogramImageScaleAsString ()
Static Public Member Functions
static vtkImageHistogram *	New ()
static int	IsTypeOf (const char *type)
static vtkImageHistogram *	SafeDownCast (vtkObject *o)
Protected Member Functions
virtual int	RequestUpdateExtent (vtkInformation vtkNotUsed(request), vtkInformationVector inInfo, vtkInformationVector vtkNotUsed(outInfo))
virtual int	RequestInformation (vtkInformation vtkNotUsed(request), vtkInformationVector inInfo, vtkInformationVector vtkNotUsed(outInfo))
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	FillInputPortInformation (int port, vtkInformation *info)
virtual int	FillOutputPortInformation (int port, vtkInformation *info)
void	ComputeImageScalarRange (vtkImageData *data, double range[2])
Protected Attributes
int	ActiveComponent
int	AutomaticBinning
int	MaximumNumberOfBins
int	HistogramImageSize [2]
int	HistogramImageScale
int	GenerateHistogramImage
int	NumberOfBins
double	BinOrigin
double	BinSpacing
vtkIdTypeArray *	Histogram
vtkIdType	Total
vtkIdType *	ThreadOutput [VTK_MAX_THREADS]
int	ThreadBinRange [VTK_MAX_THREADS][2]
virtual void	ThreadedRequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector, vtkImageData *inData, vtkImageData outData, int ext[6], int id)
	vtkImageHistogram ()
	~vtkImageHistogram ()

Detailed Description

Compute the histogram for an image.

vtkImageHistogram generates a histogram from its input, and optionally produces a 2D black-and-white image of the histogram as its output. Unlike the class vtkImageAccumulate, a multi-component image does not result in a multi-dimensional histogram. Instead, the resulting histogram will be the sum of the histograms of each of the individual components, unless SetActiveComponent is used to choose a single component.

Thanks:: Thanks to David Gobbi at the Seaman Family MR Centre and Dept. of Clinical Neurosciences, Foothills Medical Centre, Calgary, for providing this class.

Tests:: vtkImageHistogram (Tests)

Definition at line 41 of file vtkImageHistogram.h.

Member Typedef Documentation

typedef vtkThreadedImageAlgorithm vtkImageHistogram::Superclass

Reimplemented from vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

Definition at line 45 of file vtkImageHistogram.h.

Member Enumeration Documentation

anonymous enum

Scale types for the histogram image.

Enumerator:

Linear
Log
Sqrt

Definition at line 51 of file vtkImageHistogram.h.

Constructor & Destructor Documentation

vtkImageHistogram::vtkImageHistogram ( ) [protected]

This is part of the executive, but is public so that it can be accessed by non-member functions.

vtkImageHistogram::~vtkImageHistogram ( ) [protected]

This is part of the executive, but is public so that it can be accessed by non-member functions.

Member Function Documentation

static vtkImageHistogram* vtkImageHistogram::New ( ) [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

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

Reimplemented from vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

static int vtkImageHistogram::IsTypeOf ( const char * name ) [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 vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

virtual int vtkImageHistogram::IsA ( const char * name ) [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 vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

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

Reimplemented from vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

void vtkImageHistogram::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 vtkThreadedImageAlgorithm.

Reimplemented in vtkImageHistogramStatistics.

virtual void vtkImageHistogram::SetActiveComponent ( int ) [virtual]

Set the component for which to generate a histogram. The default value is -1, which produces a histogram that is the sum of the histograms of the individual components.

virtual int vtkImageHistogram::GetActiveComponent ( ) [virtual]

Set the component for which to generate a histogram. The default value is -1, which produces a histogram that is the sum of the histograms of the individual components.

virtual void vtkImageHistogram::SetAutomaticBinning ( int ) [virtual]

If this is On, then the histogram binning will be done automatically. For char and unsigned char data, there will be 256 bins with unit spacing. For data of type short and larger, there will be between 256 and MaximumNumberOfBins, depending on the range of the data, and the BinOrigin will be set to zero if no negative values are present, or to the smallest negative value if negative values are present. For float data, the MaximumNumberOfBins will always be used. The BinOrigin and BinSpacing will be set so that they provide a mapping from bin index to scalar value.

virtual void vtkImageHistogram::AutomaticBinningOn ( ) [virtual]

If this is On, then the histogram binning will be done automatically. For char and unsigned char data, there will be 256 bins with unit spacing. For data of type short and larger, there will be between 256 and MaximumNumberOfBins, depending on the range of the data, and the BinOrigin will be set to zero if no negative values are present, or to the smallest negative value if negative values are present. For float data, the MaximumNumberOfBins will always be used. The BinOrigin and BinSpacing will be set so that they provide a mapping from bin index to scalar value.

virtual void vtkImageHistogram::AutomaticBinningOff ( ) [virtual]

If this is On, then the histogram binning will be done automatically. For char and unsigned char data, there will be 256 bins with unit spacing. For data of type short and larger, there will be between 256 and MaximumNumberOfBins, depending on the range of the data, and the BinOrigin will be set to zero if no negative values are present, or to the smallest negative value if negative values are present. For float data, the MaximumNumberOfBins will always be used. The BinOrigin and BinSpacing will be set so that they provide a mapping from bin index to scalar value.

virtual int vtkImageHistogram::GetAutomaticBinning ( ) [virtual]

If this is On, then the histogram binning will be done automatically. For char and unsigned char data, there will be 256 bins with unit spacing. For data of type short and larger, there will be between 256 and MaximumNumberOfBins, depending on the range of the data, and the BinOrigin will be set to zero if no negative values are present, or to the smallest negative value if negative values are present. For float data, the MaximumNumberOfBins will always be used. The BinOrigin and BinSpacing will be set so that they provide a mapping from bin index to scalar value.

virtual void vtkImageHistogram::SetMaximumNumberOfBins ( int ) [virtual]

The maximum number of bins to use when AutomaticBinning is On. When AutomaticBinning is On, the size of the output histogram will be set to the full range of the input data values, unless the full range is greater than this value. By default, the max value is 65536, which is large enough to capture the full range of 16-bit integers.

virtual int vtkImageHistogram::GetMaximumNumberOfBins ( ) [virtual]

The maximum number of bins to use when AutomaticBinning is On. When AutomaticBinning is On, the size of the output histogram will be set to the full range of the input data values, unless the full range is greater than this value. By default, the max value is 65536, which is large enough to capture the full range of 16-bit integers.

virtual void vtkImageHistogram::SetNumberOfBins ( int ) [virtual]

The number of bins in histogram (default 256). This is automatically computed unless AutomaticBinning is Off.

virtual int vtkImageHistogram::GetNumberOfBins ( ) [virtual]

The number of bins in histogram (default 256). This is automatically computed unless AutomaticBinning is Off.

virtual void vtkImageHistogram::SetBinOrigin ( double ) [virtual]

The value for the center of the first bin (default 0). This is automatically computed unless AutomaticBinning is Off.

virtual double vtkImageHistogram::GetBinOrigin ( ) [virtual]

The value for the center of the first bin (default 0). This is automatically computed unless AutomaticBinning is Off.

virtual void vtkImageHistogram::SetBinSpacing ( double ) [virtual]

The bin spacing (default 1). This is automatically computed unless AutomaticBinning is Off.

virtual double vtkImageHistogram::GetBinSpacing ( ) [virtual]

The bin spacing (default 1). This is automatically computed unless AutomaticBinning is Off.

void vtkImageHistogram::SetStencil ( vtkImageStencilData * stencil )

Use a stencil to compute the histogram for just a part of the image.

vtkImageStencilData* vtkImageHistogram::GetStencil ( )

Use a stencil to compute the histogram for just a part of the image.

virtual void vtkImageHistogram::SetGenerateHistogramImage ( int ) [virtual]

If this is On, then a histogram image will be produced as the output. Regardless of this setting, the histogram is always available as a vtkIdTypeArray from the GetHistogram method.

virtual void vtkImageHistogram::GenerateHistogramImageOn ( ) [virtual]

If this is On, then a histogram image will be produced as the output. Regardless of this setting, the histogram is always available as a vtkIdTypeArray from the GetHistogram method.

virtual void vtkImageHistogram::GenerateHistogramImageOff ( ) [virtual]

If this is On, then a histogram image will be produced as the output. Regardless of this setting, the histogram is always available as a vtkIdTypeArray from the GetHistogram method.

virtual int vtkImageHistogram::GetGenerateHistogramImage ( ) [virtual]

If this is On, then a histogram image will be produced as the output. Regardless of this setting, the histogram is always available as a vtkIdTypeArray from the GetHistogram method.

virtual void vtkImageHistogram::SetHistogramImageSize	(	int	,
		int
	)		`[virtual]`

Set the size of the histogram image that is produced as output. The default is 256 by 256.

void vtkImageHistogram::SetHistogramImageSize ( int [2] )

Set the size of the histogram image that is produced as output. The default is 256 by 256.

virtual int* vtkImageHistogram::GetHistogramImageSize ( ) [virtual]

Set the size of the histogram image that is produced as output. The default is 256 by 256.

virtual void vtkImageHistogram::GetHistogramImageSize	(	int &	,
		int &
	)		`[virtual]`

Set the size of the histogram image that is produced as output. The default is 256 by 256.

virtual void vtkImageHistogram::GetHistogramImageSize ( int [2] ) [virtual]

Set the size of the histogram image that is produced as output. The default is 256 by 256.

virtual void vtkImageHistogram::SetHistogramImageScale ( int ) [virtual]