lti::qmfInverse Class Reference

This class allows the reconstruction of channels which were wavelet- transformed by the functor lti::qmf. More...

#include <ltiQmfInverse.h>

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List of all members.

Public Types
typedef lti::qmf::parameters	parameters
Public Member Functions
	qmfInverse ()
	qmfInverse (const qmfInverse &other)
virtual	~qmfInverse ()
virtual const char *	getTypeName () const
bool	apply (channel &srcdest)
bool	apply (vector< float > &srcdest)
bool	apply (const channel &src, channel &dest)
bool	apply (const vector< float > &src, vector< float > &dest)
qmfInverse &	copy (const qmfInverse &other)
virtual functor *	clone () const
const parameters &	getParameters () const
Protected Member Functions
void	mergeTwo (vector< float > &src, const int &from, const int &to) const
void	mergeTwo (channel &src, const int &fromRow, const int &toRow, const int &fromCol, const int &toCol) const
void	mergeTwoCol (channel &src, const int &fromRow, const int &toRow, const int &fromCol, const int &toCol) const
void	initializeUpsamplers (const bool onlyRows=true)
Protected Attributes
upsampling	lowUpsampler
upsampling	highUpsampler
upsampling	lowColUpsampler
upsampling	highColUpsampler

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Detailed Description

This class allows the reconstruction of channels which were wavelet- transformed by the functor lti::qmf.

The low-pass kernel specified in the parameters will be used to calculate the wavelet coefficients required in the inverse wavelet transform.

See also:

lti::qmfInverse::parameters

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Member Typedef Documentation

typedef lti::qmf::parameters lti::qmfInverse::parameters

the parameters for the class qmfInverse are the same than for the qmf functor (see lti::qmf::parameters).

This way it is really easy to set the parameters for the transform and its inverse:

 lti::qmf theTransform;
 lti::qmfInverse theInvTransform;

 lti::qmf::parameters qmfParam;
 qmfParam.setKernel(haarKernel()); // use the haar kernel
 qmfParam.levels = 3;              // decompose in one low-pass band and
                                   // three high-pass bands
 theTransform.setParameters(qmfParam);
 theInvTransform.setParameters(qmfParam); // the same parameters can be
                                          // used!

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Constructor & Destructor Documentation

lti::qmfInverse::qmfInverse

(

)

default constructor

lti::qmfInverse::qmfInverse

(

const qmfInverse &

other

)

copy constructor

Parameters:

other

the object to be copied

virtual lti::qmfInverse::~qmfInverse

(

)

[virtual]

destructor

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Member Function Documentation

bool lti::qmfInverse::apply	(	const vector< float > &	src,
		vector< float > &	dest
	)

operates on a copy of the given parameters.

Parameters:

	src	vector<float> with the source data.
	dest	vector<float> where the result will be left.

Returns:

a reference to the dest.

bool lti::qmfInverse::apply	(	const channel &	src,
		channel &	dest
	)

operates on a copy of the given parameters.

Parameters:

	src	channel with the source data.
	dest	channel where the result will be left.

Returns:

a reference to the dest.

bool lti::qmfInverse::apply

(

vector< float > &

srcdest

)

operates on the given parameter.

Parameters:

srcdest

vector<float> with the source data. The result will be left here too.

Returns:

a reference to the srcdest.

bool lti::qmfInverse::apply

(

channel &

srcdest

)

operates on the given parameter.

Parameters:

srcdest

channel with the source data. The result will be left here too.

Returns:

a reference to the srcdest.

virtual functor* lti::qmfInverse::clone

(

)

const [virtual]

returns a pointer to a clone of this functor.

Implements lti::functor.

qmfInverse& lti::qmfInverse::copy

(

const qmfInverse &

other

)

copy data of "other" functor.

Parameters:

other

the functor to be copied

Returns:

a reference to this functor object

Reimplemented from lti::functor.

const parameters& lti::qmfInverse::getParameters

(

)

const

returns used parameters

Reimplemented from lti::modifier.

virtual const char* lti::qmfInverse::getTypeName

(

)

const [virtual]

returns the name of this type ("qmfInverse")

Reimplemented from lti::modifier.

void lti::qmfInverse::initializeUpsamplers

(

const bool

onlyRows = true

)

[protected]

initialize both upsampling functors, using the kernel filter specified in the parameters.

If onlyRows is false, also the upsamplers for columns of channels will be initialized.

void lti::qmfInverse::mergeTwo	(	channel &	src,
		const int &	fromRow,
		const int &	toRow,
		const int &	fromCol,
		const int &	toCol
	)			const [protected]

transform just the two bands between the given indices for each row.

The result will be left at the same place! Do not forget to initialize the upsampling functors before calling this member!

void lti::qmfInverse::mergeTwo	(	vector< float > &	src,
		const int &	from,
		const int &	to
	)			const [protected]

transform just the two bands between the given indices.

The result will be left at the same place! Do not forget to initialize the upsampling functors before calling this member!

void lti::qmfInverse::mergeTwoCol	(	channel &	src,
		const int &	fromRow,
		const int &	toRow,
		const int &	fromCol,
		const int &	toCol
	)			const [protected]

transform just the two bands between the given indices for each column.

The result will be left at the same place! Do not forget to initialize the upsampling functors before calling this member!

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Member Data Documentation

upsampling lti::qmfInverse::highColUpsampler [protected]

upsampling functor for the high-frecuency band of columns

upsampling lti::qmfInverse::highUpsampler [protected]

upsampling functor for the high-frecuency band

upsampling lti::qmfInverse::lowColUpsampler [protected]

upsampling functor for the low-frecuency band of columns

upsampling lti::qmfInverse::lowUpsampler [protected]

upsampling functor for the low-frecuency band

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

• ltiQmfInverse.h