SoxChannel Class Reference

A short-range orientation interactions channel. More...

#include <Channels/SoxChannel.H>

Inheritance diagram for SoxChannel:

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Collaboration diagram for SoxChannel:

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List of all members.

Classes
struct	CacheElem
Public Member Functions
	SoxChannel (OptionManager &mgr)
	Construct.
virtual	~SoxChannel ()
	Virtual destructor.
uint	numScales () const
	Get the number of scales used.
Image< float >	getLinearResponse (int ori, int scl)
	Get the linear response of the units for a given orientation+scale.
Image< float >	getNonlinearResponse (int ori, int scl)
	Get the non-linear response of the units for a given orientation+scale.
nub::ref< GaborChannel >	gabor (const uint idx) const
	Wraps ComplexChannel's subChan() and casts the result to GaborChannel.
Protected Member Functions
void	buildSubChans ()
	(re-)build our subchannels
virtual void	doInput (const InputFrame &inframe)
	SoxChannel requires only luminance input.
virtual Image< float >	combineOutputs ()
	Combine all of the nonlinear responses.
virtual void	killCaches ()
	Clear our cached inhibitory pool maps.
virtual void	paramChanged (ModelParamBase *const param, const bool valueChanged, ParamClient::ChangeStatus *status)
	Overload so that we can reconfigure when our params get changed.
Protected Attributes
OModelParam< uint >	itsNumOrients
	number of Gabor subchannels
OModelParam< double >	thetaPoolWidth
OModelParam< double >	omegaPoolWidth
OModelParam< double >	inhibExponent
OModelParam< double >	excitExponent
OModelParam< double >	semiSaturation
OModelParam< double >	cutoff

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Detailed Description

A short-range orientation interactions channel.

This class implements a pool of orientation-tuned units whose responses are shaped by divisive inhibition in proportion to population activity.

Definition at line 48 of file SoxChannel.H.

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Constructor & Destructor Documentation

SoxChannel::SoxChannel

(

OptionManager &

mgr

)

Construct.

Definition at line 111 of file SoxChannel.C.

References buildSubChans(), and OptionManager::requestOptionAlias().

SoxChannel::~SoxChannel

(

)

[virtual]

Virtual destructor.

Definition at line 175 of file SoxChannel.C.

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Member Function Documentation

void SoxChannel::buildSubChans

(

)

[protected]

(re-)build our subchannels

Definition at line 129 of file SoxChannel.C.

References ComplexChannel::addSubChan(), ModelComponent::getManager(), OModelParam< T >::getVal(), itsNumOrients, makeSharedComp(), MC_RECURSE, and ComplexChannel::removeAllSubChans().

Referenced by paramChanged(), and SoxChannel().

Image< float > SoxChannel::combineOutputs

(

)

[protected, virtual]

Combine all of the nonlinear responses.

Reimplemented from ComplexChannel.

Definition at line 283 of file SoxChannel.C.

References ComplexChannel::getMapDims(), getNonlinearResponse(), OModelParam< T >::getVal(), ComplexChannel::itsNormType, maxNormalize(), MAXNORMMAX, MAXNORMMIN, ComplexChannel::numChans(), numScales(), rescale(), VCXNORM_MAXNORM, and ZEROS.

void SoxChannel::doInput

(

const InputFrame &

inframe

)

[protected, virtual]

SoxChannel requires only luminance input.

Implements ChannelBase.

Definition at line 183 of file SoxChannel.C.

References ASSERT, gabor(), Image< T >::initialized(), and ComplexChannel::numChans().

nub::ref< GaborChannel > SoxChannel::gabor

(

const uint

idx

)

const

Wraps ComplexChannel's subChan() and casts the result to GaborChannel.

Definition at line 171 of file SoxChannel.C.

References ComplexChannel::subChan().

Referenced by doInput(), getLinearResponse(), getNonlinearResponse(), and numScales().

Image< float > SoxChannel::getLinearResponse	(	int	ori,
		int	scl
	)

Get the linear response of the units for a given orientation+scale.

Definition at line 196 of file SoxChannel.C.

References ASSERT, gabor(), and Image< T >::initialized().

Referenced by getNonlinearResponse().

Image< float > SoxChannel::getNonlinearResponse	(	int	ori,
		int	scl
	)

Get the non-linear response of the units for a given orientation+scale.

This is (rougly speaking) given by a power of the linear response, divided by an inhibitory term that pools over all orientations and scales.

Definition at line 204 of file SoxChannel.C.

References ASSERT, exp(), gabor(), Image< T >::getDims(), ChannelBase::getInputDims(), getLinearResponse(), OModelParam< T >::getVal(), Image< T >::getWidth(), Image< T >::initialized(), inplaceAddWeighted(), log(), NO_INIT, ComplexChannel::numChans(), numScales(), squareOf(), toPower(), and Dims::w().

Referenced by combineOutputs().

void SoxChannel::killCaches

(

)

[protected, virtual]

Clear our cached inhibitory pool maps.

Reimplemented from ComplexChannel.

Definition at line 306 of file SoxChannel.C.

uint SoxChannel::numScales

(

)

const

Get the number of scales used.

Definition at line 179 of file SoxChannel.C.

References gabor().

Referenced by combineOutputs(), and getNonlinearResponse().

void SoxChannel::paramChanged	(	ModelParamBase *const	param,
		const bool	valueChanged,
		ParamClient::ChangeStatus *	status
	)			[protected, virtual]

Overload so that we can reconfigure when our params get changed.

Reimplemented from ModelComponent.

Definition at line 157 of file SoxChannel.C.

References buildSubChans(), OModelParam< T >::getVal(), itsNumOrients, and ComplexChannel::numChans().

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Member Data Documentation

OModelParam<uint> SoxChannel::itsNumOrients [protected]

number of Gabor subchannels

Definition at line 73 of file SoxChannel.H.

Referenced by buildSubChans(), and paramChanged().

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

• src/Channels/SoxChannel.H
• src/Channels/SoxChannel.C