tesseract::PermuterState Class Reference

#include <permute.h>

List of all members.

Public Member Functions
	PermuterState ()
void	Init (const BLOB_CHOICE_LIST_VECTOR &char_choices, const UNICHARSET &unicharset, float default_bias, bool debug)
void	AddPreference (int start_pos, char *pos_str, float weight)
void	AddPreference (int char_pos, BLOB_CHOICE *blob_choice, float weight)
WERD_CHOICE *	GetPermutedWord (float *certainties, float *adjust_factor)
void	set_allow_collision (bool flag)
void	set_adjust_factor (float factor)
void	set_debug (bool debug)
bool	position_marked (int pos)

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Detailed Description

Definition at line 113 of file permute.h.

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Constructor & Destructor Documentation

tesseract::PermuterState::PermuterState

(

)

Definition at line 231 of file permute.cpp.

                             {
  unicharset_ = NULL;
  char_choices_ = NULL;
  adjust_factor_ = 1.0f;
  allow_collision_ = false;
  word_length_ = 0;
  debug_ = false;
}

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Member Function Documentation

void tesseract::PermuterState::AddPreference	(	int	start_pos,
		char *	pos_str,
		float	weight
	)

Definition at line 266 of file permute.cpp.

                                                                            {
  ASSERT_HOST(char_choices_ != NULL);
  ASSERT_HOST(start_pos + strlen(pos_str) - 1 < word_length_);
  if (debug_) {
    tprintf("Copy over %s -> %s @ %d ", pos_str, perm_state_, start_pos);
  }
  // copy over preferred position without the terminating null
  if (!allow_collision_) {
    int len = strlen(pos_str);
    for (int i = 0; i < len; ++i)
      if (position_marked(start_pos + i)) return;
  }
  strncpy(&perm_state_[start_pos], pos_str, strlen(pos_str));
  adjust_factor_ *= weight;
  if (debug_) tprintf("==> %s %f\n", perm_state_, adjust_factor_);
}

void tesseract::PermuterState::AddPreference	(	int	char_pos,
		BLOB_CHOICE *	blob_choice,
		float	weight
	)

Definition at line 284 of file permute.cpp.

                                                {
  ASSERT_HOST(char_choices_ != NULL);
  ASSERT_HOST(char_pos < word_length_);
  // avoid collision (but this doesn't work if the first choice is favored!
  if (!allow_collision_ && position_marked(char_pos)) return;

  if (debug_) {
    tprintf("Set UID %d -> %s @ %d ",
            blob_choice->unichar_id(), perm_state_, char_pos);
  }
  int pos = find_choice_by_uid(char_choices_->get(char_pos),
                               blob_choice->unichar_id());
  perm_state_[char_pos] = pos + '0';
  adjust_factor_ *= weight;
  if (debug_) tprintf("==> %s %f\n", perm_state_, adjust_factor_);
}

WERD_CHOICE * tesseract::PermuterState::GetPermutedWord	(	float *	certainties,
		float *	adjust_factor
	)

Definition at line 303 of file permute.cpp.

                                                                  {
  ASSERT_HOST(char_choices_ != NULL);
  WERD_CHOICE *word_choice = get_choice_from_posstr(
      unicharset_, *char_choices_, 0, perm_state_, certainties);
  float rating = word_choice->rating() * adjust_factor_;
  word_choice->set_rating(rating);
  *adjust_factor = adjust_factor_;
  return word_choice;
}

void tesseract::PermuterState::Init	(	const BLOB_CHOICE_LIST_VECTOR &	char_choices,
		const UNICHARSET &	unicharset,
		float	default_bias,
		bool	debug
	)

Definition at line 240 of file permute.cpp.

                                     {
  ASSERT_HOST(char_choices.length() < MAX_PERM_LENGTH);
  unicharset_ = &unicharset;
  char_choices_ = &char_choices;
  word_length_ = char_choices.length();
  for (int i = 0; i < word_length_; ++i)
    perm_state_[i] = kPosFree;
  perm_state_[word_length_] = '\0';
  // Skip fragment choice and the mark positions so they remain unchanged.
  for (int i = 0; i < word_length_; ++i) {
    UNICHAR_ID unichar_id = get_top_choice_uid(char_choices.get(i));
    if (unicharset.get_fragment(unichar_id) != NULL)
      perm_state_[i] = '1';
  }
  adjust_factor_ = default_bias;
  allow_collision_ = false;
  debug_ = debug;
}

bool tesseract::PermuterState::position_marked

(

int

pos

)

[inline]

Definition at line 131 of file permute.h.

{ return perm_state_[pos] != kPosFree; }

void tesseract::PermuterState::set_adjust_factor

(

float

factor

)

[inline]

Definition at line 129 of file permute.h.

{ adjust_factor_ = factor; }

void tesseract::PermuterState::set_allow_collision

(

bool

flag

)

[inline]

Definition at line 128 of file permute.h.

{ allow_collision_ = flag; }

void tesseract::PermuterState::set_debug

(

bool

debug

)

[inline]

Definition at line 130 of file permute.h.

{ debug_ = debug; }

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

• tesseract-ocr/dict/permute.h
• tesseract-ocr/dict/permute.cpp