Tesseract 3.02

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Public Member Functions | Static Public Member Functions
tesseract::WordListLangModel Class Reference

`#include <word_list_lang_model.h>`

Inheritance diagram for tesseract::WordListLangModel:

List of all members.

## 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 167 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 181 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 71 of file word_list_lang_model.cpp.

{
// initialize if necessary
if (init_ == false) {
if (Init() == false) {
return false;
}
}
(*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 0;
}
}
// 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 | ) |

inline virtual

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 | ) |

inline virtual

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 | ) |

inline virtual

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 114 of file word_list_lang_model.cpp.

{
return false;
}

LangModEdge * tesseract::WordListLangModel::Root | ( |  | ) |

virtual

Implements tesseract::LangModel.

Definition at line 66 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 154 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);
}

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

- /mnt/data/src/tesseract-ocr/cube/word_list_lang_model.h
- /mnt/data/src/tesseract-ocr/cube/word_list_lang_model.cpp