lti::pointDistributionModel Class Reference

This class is the data structure for a Point Distribution Model (PDM). More...

#include <ltiPointDistributionModel.h>

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List of all members.

Public Types
typedef tpointList< float >	shape
Public Member Functions
	pointDistributionModel ()
	pointDistributionModel (const pointDistributionModel &other)
virtual	~pointDistributionModel ()
pointDistributionModel &	copy (const pointDistributionModel &other)
pointDistributionModel &	operator= (const pointDistributionModel &other)
const char *	getTypeName () const
virtual bool	write (ioHandler &handler, const bool complete=true) const
virtual bool	read (ioHandler &handler, const bool complete=true)
Public Attributes
shape	meanShape
matrix< double >	eigenVectorMatrix
vector< double >	varianceVector

Detailed Description

This class is the data structure for a Point Distribution Model (PDM).

A PDM allows to represent a shape and its possible deformations, by a mean shape and the eigenvectors and eigenvalues of the shape set. It is estimated by the pdmGenerator and can be used to regularize the deformations of an activeShapeModel (ASM).

For a description of PDMs see: Sonka, "Image Processing, Analysis, and Machine Vision", p380ff.

Additional Remark:

In ASMs a shape x is described as the sum of mean shape and the weighted eigenvectors. Note that in common a subset of all eigenvectors is chosen (i.e. the eigenvectors with the first n largest eigenvalues) for data compression reasons.

x = xMean + eigenVectors*w

Member Typedef Documentation

typedef tpointList<float> lti::pointDistributionModel::shape

Typedef for a single PDM shape.

A shape is an ordered list of landmark points of a 2D object. Generally this will be created by sampling a fixed number of N points along the boundary.

Constructor & Destructor Documentation

lti::pointDistributionModel::pointDistributionModel ( )

default constructor

lti::pointDistributionModel::pointDistributionModel ( const pointDistributionModel & other )

copy constructor

Parameters:

other

the object to be copied

virtual lti::pointDistributionModel::~pointDistributionModel ( ) [virtual]

destructor

Member Function Documentation

pointDistributionModel& lti::pointDistributionModel::copy ( const pointDistributionModel & other )

copy data of "other" pointDistributionModel.

Please note that the status string will _NOT_ be copied!

Reimplemented from lti::ioObject.

const char* lti::pointDistributionModel::getTypeName ( ) const [virtual]

returns the name of this type ("pointDistributionModel")

Reimplemented from lti::ioObject.

pointDistributionModel& lti::pointDistributionModel::operator= ( const pointDistributionModel & other )

assigment operator (alias for copy(other)).

Parameters:

other

the pointDistributionModel to be copied

Returns:: a reference to the actual pointDistributionModel

Reimplemented from lti::ioObject.

virtual bool lti::pointDistributionModel::read	(	ioHandler &	handler,
		const bool	complete = `true`
	)			`[virtual]`

read the pointDistributionModel from the given ioHandler

Parameters:

	handler	the ioHandler to be used
	complete	if true (the default) the enclosing begin/end will be also written, otherwise only the data block will be written.

Returns:: true if write was successful

Reimplemented from lti::ioObject.

virtual bool lti::pointDistributionModel::write	(	ioHandler &	handler,
		const bool	complete = `true`
	)			const `[virtual]`

write the pointDistributionModel in the given ioHandler

Parameters:

	handler	the ioHandler to be used
	complete	if true (the default) the enclosing begin/end will be also written, otherwise only the data block will be written.