tesseract::CTC Class Reference

#include <ctc.h>

Collaboration diagram for tesseract::CTC:

Static Public Member Functions
static void	NormalizeProbs (NetworkIO *probs)
static bool	ComputeCTCTargets (const GenericVector< int > &truth_labels, int null_char, const GENERIC_2D_ARRAY< float > &outputs, NetworkIO *targets)

Private Member Functions
	CTC (const GenericVector< int > &labels, int null_char, const GENERIC_2D_ARRAY< float > &outputs)
bool	ComputeLabelLimits ()
void	ComputeSimpleTargets (GENERIC_2D_ARRAY< float > *targets) const
void	ComputeWidthsAndMeans (GenericVector< float > *half_widths, GenericVector< int > *means) const
float	CalculateBiasFraction ()
void	Forward (GENERIC_2D_ARRAY< double > *log_probs) const
void	Backward (GENERIC_2D_ARRAY< double > *log_probs) const
void	NormalizeSequence (GENERIC_2D_ARRAY< double > *probs) const
void	LabelsToClasses (const GENERIC_2D_ARRAY< double > &probs, NetworkIO *targets) const
bool	NeededNull (int index) const

Static Private Member Functions
static void	NormalizeProbs (GENERIC_2D_ARRAY< float > *probs)
static double	ClippedExp (double x)

Private Attributes
const GenericVector< int > &	labels_
GENERIC_2D_ARRAY< float >	outputs_
int	null_char_
int	num_timesteps_
int	num_classes_
int	num_labels_
GenericVector< int >	min_labels_
GenericVector< int >	max_labels_

Static Private Attributes
static const float	kMinProb_ = 1e-12
static const double	kMaxExpArg_ = 80.0
static const double	kMinTotalTimeProb_ = 1e-8
static const double	kMinTotalFinalProb_ = 1e-6

Constructor & Destructor Documentation

CTC()

tesseract::CTC::CTC ( const GenericVector< int > &  labels, int  null_char, const GENERIC_2D_ARRAY< float > &  outputs  )

private

Member Function Documentation

Backward()

void tesseract::CTC::Backward ( GENERIC_2D_ARRAY< double > *  log_probs ) const

private

CalculateBiasFraction()

float tesseract::CTC::CalculateBiasFraction ( )

private

ClippedExp()

static double tesseract::CTC::ClippedExp ( double  x )

inlinestaticprivate

ComputeCTCTargets()

bool tesseract::CTC::ComputeCTCTargets ( const GenericVector< int > &  truth_labels, int  null_char, const GENERIC_2D_ARRAY< float > &  outputs, NetworkIO *  targets  )

static

ComputeLabelLimits()

bool tesseract::CTC::ComputeLabelLimits ( )

private

ComputeSimpleTargets()

void tesseract::CTC::ComputeSimpleTargets ( GENERIC_2D_ARRAY< float > *  targets ) const

private

ComputeWidthsAndMeans()

void tesseract::CTC::ComputeWidthsAndMeans ( GenericVector< float > *  half_widths, GenericVector< int > *  means  ) const

private

Forward()

void tesseract::CTC::Forward ( GENERIC_2D_ARRAY< double > *  log_probs ) const

private

LabelsToClasses()

void tesseract::CTC::LabelsToClasses ( const GENERIC_2D_ARRAY< double > &  probs, NetworkIO *  targets  ) const

private

NeededNull()

bool tesseract::CTC::NeededNull ( int  index ) const

private

NormalizeProbs() [1/2]

static void tesseract::CTC::NormalizeProbs ( NetworkIO *  probs )

inlinestatic

NormalizeProbs() [2/2]

void tesseract::CTC::NormalizeProbs ( GENERIC_2D_ARRAY< float > *  probs )

staticprivate

NormalizeSequence()

void tesseract::CTC::NormalizeSequence ( GENERIC_2D_ARRAY< double > *  probs ) const

private

Member Data Documentation

kMaxExpArg_

const double tesseract::CTC::kMaxExpArg_ = 80.0

staticprivate

kMinProb_

const float tesseract::CTC::kMinProb_ = 1e-12

staticprivate

kMinTotalFinalProb_

const double tesseract::CTC::kMinTotalFinalProb_ = 1e-6

staticprivate

kMinTotalTimeProb_

const double tesseract::CTC::kMinTotalTimeProb_ = 1e-8

staticprivate

labels_

const GenericVector<int>& tesseract::CTC::labels_

private

max_labels_

GenericVector<int> tesseract::CTC::max_labels_

private

min_labels_

GenericVector<int> tesseract::CTC::min_labels_

private

null_char_

int tesseract::CTC::null_char_

private

num_classes_

int tesseract::CTC::num_classes_

private

num_labels_

int tesseract::CTC::num_labels_

private

num_timesteps_

int tesseract::CTC::num_timesteps_

private

outputs_

GENERIC_2D_ARRAY<float> tesseract::CTC::outputs_

private

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

• /home/stephane/src/tesseract/src/lstm/ctc.h
• /home/stephane/src/tesseract/src/lstm/ctc.cpp