tesseract::WordListLangModel Class Reference

#include <word_list_lang_model.h>

Inheritance diagram for tesseract::WordListLangModel:

Public Member Functions
	WordListLangModel (CubeRecoContext *cntxt)
	~WordListLangModel ()
LangModEdge *	Root ()
LangModEdge **	GetEdges (CharAltList *alt_list, LangModEdge *edge, int *edge_cnt)
bool	IsValidSequence (const char_32 *sequence, bool eow_flag, LangModEdge **edges)
bool	IsLeadingPunc (char_32 ch)
bool	IsTrailingPunc (char_32 ch)
bool	IsDigit (char_32 ch)
bool	AddString (const char *char_ptr)
bool	AddString32 (const char_32 *char_32_ptr)
Public Member Functions inherited from tesseract::LangModel
	LangModel ()
virtual	~LangModel ()
bool	OOD ()
bool	Numeric ()
bool	WordList ()
bool	Punc ()
void	SetOOD (bool ood)
void	SetNumeric (bool numeric)
void	SetWordList (bool word_list)
void	SetPunc (bool punc_enabled)

Static Public Member Functions
static void	WordVariants (const CharSet &char_set, const UNICHARSET *uchset, string_32 str32, vector< WERD_CHOICE * > *word_variants)

Additional Inherited Members
Protected Attributes inherited from tesseract::LangModel
bool	ood_enabled_
bool	numeric_enabled_
bool	word_list_enabled_
bool	punc_enabled_

Detailed Description

Definition at line 39 of file word_list_lang_model.h.

Constructor & Destructor Documentation

tesseract::WordListLangModel::WordListLangModel ( CubeRecoContext *  cntxt )

explicit

Definition at line 29 of file word_list_lang_model.cpp.

                                                           {
  cntxt_ = cntxt;
  dawg_ = NULL;
  init_ = false;
}

tesseract::WordListLangModel::~WordListLangModel

(

)

Definition at line 35 of file word_list_lang_model.cpp.

                                      {
  Cleanup();
}

Member Function Documentation

bool tesseract::WordListLangModel::AddString

(

const char *

char_ptr

)

Definition at line 166 of file word_list_lang_model.cpp.

                                                      {
  if (!init_ && !Init()) {  // initialize if necessary
    return false;
  }

  string_32 str32;
  CubeUtils::UTF8ToUTF32(char_ptr, &str32);
  if (str32.length() < 1) {
    return false;
  }
  return AddString32(str32.c_str());
}

bool tesseract::WordListLangModel::AddString32

(

const char_32 *

char_32_ptr

)

Definition at line 180 of file word_list_lang_model.cpp.

                                                              {
  if (char_32_ptr == NULL) {
    return false;
  }
  // get all the word variants
  vector<WERD_CHOICE *> word_variants;
  WordVariants(*(cntxt_->CharacterSet()), cntxt_->TessUnicharset(),
               char_32_ptr, &word_variants);

  if (word_variants.size() > 0) {
    // find the shortest variant
    int shortest_word = 0;
    for (int word = 1; word < word_variants.size(); word++) {
      if (word_variants[shortest_word]->length() >
          word_variants[word]->length()) {
        shortest_word = word;
      }
    }
    // only add the shortest grapheme interpretation of string to the word list
    dawg_->add_word_to_dawg(*word_variants[shortest_word]);
  }
  for (int i = 0; i < word_variants.size(); i++) { delete word_variants[i]; }
  return true;
}

LangModEdge ** tesseract::WordListLangModel::GetEdges ( CharAltList *  alt_list, LangModEdge *  edge, int *  edge_cnt  )

virtual

Implements tesseract::LangModel.

Definition at line 70 of file word_list_lang_model.cpp.

                                                         {
  // initialize if necessary
  if (init_ == false) {
    if (Init() == false) {
      return NULL;
    }
  }

  (*edge_cnt) = 0;

  EDGE_REF edge_ref;

  TessLangModEdge *tess_lm_edge = reinterpret_cast<TessLangModEdge *>(edge);

  if (tess_lm_edge == NULL) {
    edge_ref = 0;
  } else {
    edge_ref = tess_lm_edge->EndEdge();

    // advance node
    edge_ref = dawg_->next_node(edge_ref);
    if (edge_ref == 0) {
      return NULL;
    }
  }

  // allocate memory for edges
  LangModEdge **edge_array = new LangModEdge *[kMaxEdge];
  if (edge_array == NULL) {
    return NULL;
  }

  // now get all the emerging edges
  (*edge_cnt) += TessLangModEdge::CreateChildren(cntxt_, dawg_, edge_ref,
                                                 edge_array + (*edge_cnt));

  return edge_array;
}

bool tesseract::WordListLangModel::IsDigit ( char_32  ch )

inlinevirtual

Implements tesseract::LangModel.

Definition at line 58 of file word_list_lang_model.h.

{ return false; }  // not yet implemented

bool tesseract::WordListLangModel::IsLeadingPunc ( char_32  ch )

inlinevirtual

Implements tesseract::LangModel.

Definition at line 56 of file word_list_lang_model.h.

{ return false; }  // not yet implemented

bool tesseract::WordListLangModel::IsTrailingPunc ( char_32  ch )

inlinevirtual

Implements tesseract::LangModel.

Definition at line 57 of file word_list_lang_model.h.

{ return false; }  // not yet implemented

bool tesseract::WordListLangModel::IsValidSequence ( const char_32 *  sequence, bool  eow_flag, LangModEdge **  edges  )

virtual

Implements tesseract::LangModel.

Definition at line 113 of file word_list_lang_model.cpp.

                                                                            {
  return false;
}

LangModEdge * tesseract::WordListLangModel::Root ( )

virtual

Implements tesseract::LangModel.

Definition at line 65 of file word_list_lang_model.cpp.

                                      {
  return NULL;
}

void tesseract::WordListLangModel::WordVariants ( const CharSet &  char_set, const UNICHARSET *  uchset, string_32  str32, vector< WERD_CHOICE * > *  word_variants  )

static

Definition at line 153 of file word_list_lang_model.cpp.

                                                                           {
  for (int i = 0; i < word_variants->size(); i++) {
    delete (*word_variants)[i];
  }
  word_variants->clear();
  string_32 prefix_str32;
  WERD_CHOICE word_so_far(uchset);
  WordVariants(char_set, prefix_str32, &word_so_far, str32, word_variants);
}

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

• cube/word_list_lang_model.h
• cube/word_list_lang_model.cpp