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Public Member Functions | Static Public Attributes
WERD_CHOICE Class Reference

`#include <ratngs.h>`

List of all members.

## Public Member Functions

| WERD_CHOICE (const UNICHARSET *unicharset)
| WERD_CHOICE (const UNICHARSET *unicharset, int reserved)
| WERD_CHOICE (const char *src_string, const char *src_lengths, float src_rating, float src_certainty, uinT8 src_permuter, const UNICHARSET &unicharset)
| WERD_CHOICE (const char *src_string, const UNICHARSET &unicharset)
| WERD_CHOICE (const WERD_CHOICE &word)
| ~WERD_CHOICE ()
const UNICHARSET * | unicharset () const
int | length () const
const UNICHAR_ID * | unichar_ids () const
const UNICHAR_ID | unichar_id (int index) const
const char * | fragment_lengths () const
const char | fragment_length (int index) const
float | rating () const
float | certainty () const
uinT8 | permuter () const
const char * | permuter_name () const
bool | fragment_mark () const
BLOB_CHOICE_LIST_CLIST * | blob_choices ()
void | set_unichar_id (UNICHAR_ID unichar_id, int index)
void | set_fragment_length (char flen, int index)
void | set_rating (float new_val)
void | set_certainty (float new_val)
void | set_permuter (uinT8 perm)
void | set_fragment_mark (bool new_fragment_mark)
void | set_length (int len)
void | set_blob_choices (BLOB_CHOICE_LIST_CLIST *blob_choices)
void | double_the_size ()
| Make more space in unichar_id_ and fragment_lengths_ arrays.
void | init (int reserved)
void | init (const char *src_string, const char *src_lengths, float src_rating, float src_certainty, uinT8 src_permuter)
void | make_bad ()
| Set the fields in this choice to be default (bad) values.
void | append_unichar_id_space_allocated (UNICHAR_ID unichar_id, char fragment_length, float rating, float certainty)
void | append_unichar_id (UNICHAR_ID unichar_id, char fragment_length, float rating, float certainty)
void | set_unichar_id (UNICHAR_ID unichar_id, char fragment_length, float rating, float certainty, int index)
bool | contains_unichar_id (UNICHAR_ID unichar_id) const
void | remove_unichar_ids (int index, int num)
void | remove_last_unichar_id ()
void | remove_unichar_id (int index)
bool | has_rtl_unichar_id () const
void | reverse_and_mirror_unichar_ids ()
void | punct_stripped (int *start_core, int *end_core) const
WERD_CHOICE | shallow_copy (int start, int end) const
void | string_and_lengths (STRING *word_str, STRING *word_lengths_str) const
const STRING | debug_string () const
bool | set_unichars_in_script_order (bool in_script_order)
bool | unichars_in_script_order () const
const STRING & | unichar_string () const
const STRING & | unichar_lengths () const
const void | print () const
const void | print (const char *msg) const
WERD_CHOICE & | operator+= (const WERD_CHOICE &second)
WERD_CHOICE & | operator= (const WERD_CHOICE &source)

## Static Public Attributes

static const float | kBadRating = 100000.0

## Detailed Description

Definition at line 186 of file ratngs.h.

## Constructor & Destructor Documentation

WERD_CHOICE::WERD_CHOICE | ( | const UNICHARSET * | unicharset | ) |

inline

Definition at line 190 of file ratngs.h.

: unicharset_(unicharset) { this->init(8); }

WERD_CHOICE::WERD_CHOICE | ( | const UNICHARSET * | unicharset,
|  | int | reserved
| ) |  |

inline

Definition at line 192 of file ratngs.h.

: unicharset_(unicharset) { this->init(reserved); }

WERD_CHOICE::WERD_CHOICE | ( | const char * | src_string,
|  | const char * | src_lengths,
|  | float | src_rating,
|  | float | src_certainty,
|  | uinT8 | src_permuter,
|  | const UNICHARSET & | unicharset
| ) |  |

inline

Definition at line 194 of file ratngs.h.

: unicharset_(&unicharset) {
this->init(src_string, src_lengths, src_rating,
src_certainty, src_permuter);
}

WERD_CHOICE::WERD_CHOICE | ( | const char * | src_string,
|  | const UNICHARSET & | unicharset
| ) |  |

WERD_CHOICE::WERD_CHOICE

Constructor to build a WERD_CHOICE from the given string. The function assumes that src_string is not NULL.

Definition at line 112 of file ratngs.cpp.

: unicharset_(&unicharset){
STRING src_lengths;
const char *ptr = src_string;
const char *end = src_string + strlen(src_string);
int step = unicharset.step(ptr);
for (; ptr < end && step > 0;
step = unicharset.step(ptr), src_lengths += step, ptr += step);
if (step != 0 && ptr == end) {
this->init(src_string, src_lengths.string(),
0.0, 0.0, NO_PERM);
} else { // there must have been an invalid unichar in the string
this->init(8);
this->make_bad();
}
}

WERD_CHOICE::WERD_CHOICE | ( | const WERD_CHOICE & | word | ) |

inline

Definition at line 205 of file ratngs.h.

: unicharset_(word.unicharset_) {
this->init(word.length());
this->operator=(word);
}

WERD_CHOICE::~WERD_CHOICE | ( |  | ) |

WERD_CHOICE::~WERD_CHOICE

Definition at line 168 of file ratngs.cpp.

{
delete[] unichar_ids_;
delete[] fragment_lengths_;
delete_blob_choices();
}

## Member Function Documentation

void WERD_CHOICE::append_unichar_id | ( | UNICHAR_ID | unichar_id,
|  | char | fragment_length,
|  | float | rating,
|  | float | certainty
| ) |  |

append_unichar_id

Make sure there is enough space in the word for the new unichar id and call append_unichar_id_space_allocated().

Definition at line 313 of file ratngs.cpp.

{
if (length_ == reserved_) {
this->double_the_size();
}
this->append_unichar_id_space_allocated(unichar_id, fragment_length,
rating, certainty);
}

void WERD_CHOICE::append_unichar_id_space_allocated | ( | UNICHAR_ID | unichar_id,
|  | char | fragment_length,
|  | float | rating,
|  | float | certainty
| ) |  |

inline

This function assumes that there is enough space reserved in the WERD_CHOICE for adding another unichar. This is an efficient alternative to append_unichar_id().

Definition at line 331 of file ratngs.h.

{
assert(reserved_ > length_);
length_++;
this->set_unichar_id(unichar_id, fragment_length,
rating, certainty, length_-1);
}

BLOB_CHOICE_LIST_CLIST* WERD_CHOICE::blob_choices | ( |  | ) |

inline

Definition at line 244 of file ratngs.h.

{
return blob_choices_;
}

float WERD_CHOICE::certainty | ( |  | ) | const

inline

Definition at line 234 of file ratngs.h.

{
return certainty_;
}

bool WERD_CHOICE::contains_unichar_id | ( | UNICHAR_ID | unichar_id | ) | const

contains_unichar_id

Returns true if unichar_ids_ contain the given unichar_id, false otherwise.

Definition at line 197 of file ratngs.cpp.

{
for (int i = 0; i < length_; ++i) {
if (unichar_ids_[i] == unichar_id) {
return true;
}
}
return false;
}

const STRING WERD_CHOICE::debug_string | ( |  | ) | const

inline

Definition at line 373 of file ratngs.h.

{
STRING word_str;
for (int i = 0; i < length_; ++i) {
word_str += unicharset_->debug_str(unichar_ids_[i]);
word_str += " ";
}
return word_str;
}

void WERD_CHOICE::double_the_size | ( |  | ) |

inline

Make more space in unichar_id_ and fragment_lengths_ arrays.

Definition at line 277 of file ratngs.h.

{
if (reserved_ > 0) {
unichar_ids_ = GenericVector<UNICHAR_ID>::double_the_size_memcpy(
reserved_, unichar_ids_);
fragment_lengths_ = GenericVector<char>::double_the_size_memcpy(
reserved_, fragment_lengths_);
reserved_ *= 2;
} else {
unichar_ids_ = new UNICHAR_ID[1];
fragment_lengths_ = new char[1];
reserved_ = 1;
}
}

const char WERD_CHOICE::fragment_length | ( | int | index | ) | const

inline

Definition at line 227 of file ratngs.h.

{
assert(index < length_);
return fragment_lengths_[index];
}

const char* WERD_CHOICE::fragment_lengths | ( |  | ) | const

inline

Definition at line 224 of file ratngs.h.

{
return fragment_lengths_;
}

bool WERD_CHOICE::fragment_mark | ( |  | ) | const

inline

Definition at line 241 of file ratngs.h.

{
return fragment_mark_;
}

bool WERD_CHOICE::has_rtl_unichar_id | ( |  | ) | const

has_rtl_unichar_id

Returns true if unichar_ids contain at least one "strongly" RTL unichar.

Definition at line 276 of file ratngs.cpp.

{
int i;
for (i = 0; i < length_; ++i) {
UNICHARSET::Direction dir = unicharset_->get_direction(unichar_ids_[i]);
if (dir == UNICHARSET::U_RIGHT_TO_LEFT ||
dir == UNICHARSET::U_RIGHT_TO_LEFT_ARABIC) {
return true;
}
}
return false;
}

void WERD_CHOICE::init | ( | int | reserved | ) |

inline

Initializes WERD_CHOICE - reserves length slots in unichar_ids_ and fragment_length_ arrays. Sets other values to default (blank) values.

Definition at line 293 of file ratngs.h.

{
reserved_ = reserved;
if (reserved > 0) {
unichar_ids_ = new UNICHAR_ID[reserved];
fragment_lengths_ = new char[reserved];
} else {
unichar_ids_ = NULL;
fragment_lengths_ = NULL;
}
length_ = 0;
rating_ = 0.0;
certainty_ = MAX_FLOAT32;
permuter_ = NO_PERM;
fragment_mark_ = false;
blob_choices_ = NULL;
unichars_in_script_order_ = false; // Tesseract is strict left-to-right.
}

void WERD_CHOICE::init | ( | const char * | src_string,
|  | const char * | src_lengths,
|  | float | src_rating,
|  | float | src_certainty,
|  | uinT8 | src_permuter
| ) |  |

Helper function to build a WERD_CHOICE from the given string, fragment lengths, rating, certainty and permuter. The function assumes that src_string is not NULL. src_lengths argument could be NULL, in which case the unichars in src_string are assumed to all be of length 1.

WERD_CHOICE::init

Helper function to build a WERD_CHOICE from the given string, fragment lengths, rating, certainty and permuter.

The function assumes that src_string is not NULL. src_lengths argument could be NULL, in which case the unichars in src_string are assumed to all be of length 1.

Definition at line 140 of file ratngs.cpp.

{
int src_string_len = strlen(src_string);
if (src_string_len == 0) {
this->init(8);
} else {
this->init(src_lengths ? strlen(src_lengths): src_string_len);
length_ = reserved_;
int offset = 0;
for (int i = 0; i < length_; ++i) {
int unichar_length = src_lengths ? src_lengths[i] : 1;
unichar_ids_[i] =
unicharset_->unichar_to_id(src_string+offset, unichar_length);
fragment_lengths_[i] = 1;
offset += unichar_length;
}
}
rating_ = src_rating;
certainty_ = src_certainty;
permuter_ = src_permuter;
}

int WERD_CHOICE::length | ( |  | ) | const

inline

Definition at line 214 of file ratngs.h.

{
return length_;
}

void WERD_CHOICE::make_bad | ( |  | ) |

inline

Set the fields in this choice to be default (bad) values.

Definition at line 321 of file ratngs.h.

{
length_ = 0;
rating_ = kBadRating;
certainty_ = -MAX_FLOAT32;
fragment_mark_ = false;
}

WERD_CHOICE & WERD_CHOICE::operator+= | ( | const WERD_CHOICE & | second | ) |

WERD_CHOICE::operator+=

Cat a second word rating on the end of this current one. The ratings are added and the confidence is the min. If the permuters are NOT the same the permuter is set to COMPOUND_PERM

Definition at line 330 of file ratngs.cpp.

{
// TODO(daria): find out why the choice was cleared this way if any
// of the pieces are empty. Add the description of this behavior
// to the comments.
// if (word_string.length () == 0 || second.word_string.length () == 0) {
// word_string = NULL; //make it empty
// word_lengths = NULL;
// delete_blob_choices();
// } else {
ASSERT_HOST(unicharset_ == second.unicharset_);
while (reserved_ < length_ + second.length()) {
this->double_the_size();
}
const UNICHAR_ID *other_unichar_ids = second.unichar_ids();
const char *other_fragment_lengths = second.fragment_lengths();
for (int i = 0; i < second.length(); ++i) {
unichar_ids_[length_ + i] = other_unichar_ids[i];
fragment_lengths_[length_ + i] = other_fragment_lengths[i];
}
length_ += second.length();
rating_ += second.rating(); // add ratings
if (second.certainty() < certainty_) // take min
certainty_ = second.certainty();
if (permuter_ == NO_PERM) {
permuter_ = second.permuter();
} else if (second.permuter() != NO_PERM &&
second.permuter() != permuter_) {
permuter_ = COMPOUND_PERM;
}
// Append a deep copy of second blob_choices if it exists.
if (second.blob_choices_ != NULL) {
if (this->blob_choices_ == NULL)
this->blob_choices_ = new BLOB_CHOICE_LIST_CLIST;
BLOB_CHOICE_LIST_C_IT this_blob_choices_it;
BLOB_CHOICE_LIST_C_IT second_blob_choices_it;
this_blob_choices_it.set_to_list(this->blob_choices_);
this_blob_choices_it.move_to_last();
second_blob_choices_it.set_to_list(second.blob_choices_);
for (second_blob_choices_it.mark_cycle_pt();
!second_blob_choices_it.cycled_list();
second_blob_choices_it.forward()) {
BLOB_CHOICE_LIST* blob_choices_copy = new BLOB_CHOICE_LIST();
blob_choices_copy->deep_copy(second_blob_choices_it.data(),
&BLOB_CHOICE::deep_copy);
this_blob_choices_it.add_after_then_move(blob_choices_copy);
}
}
return *this;
}

WERD_CHOICE & WERD_CHOICE::operator= | ( | const WERD_CHOICE & | source | ) |

WERD_CHOICE::operator=

Allocate enough memory to hold a copy of source and copy over all the information from source to this WERD_CHOICE.

Definition at line 394 of file ratngs.cpp.

{
while (reserved_ < source.length()) {
this->double_the_size();
}
unicharset_ = source.unicharset_;
const UNICHAR_ID *other_unichar_ids = source.unichar_ids();
const char *other_fragment_lengths = source.fragment_lengths();
for (int i = 0; i < source.length(); ++i) {
unichar_ids_[i] = other_unichar_ids[i];
fragment_lengths_[i] = other_fragment_lengths[i];
}
length_ = source.length();
rating_ = source.rating();
certainty_ = source.certainty();
permuter_ = source.permuter();
fragment_mark_ = source.fragment_mark();
// Delete existing blob_choices
this->delete_blob_choices();
// Deep copy blob_choices of source
if (source.blob_choices_ != NULL) {
BLOB_CHOICE_LIST_C_IT this_blob_choices_it;
BLOB_CHOICE_LIST_C_IT source_blob_choices_it;
this->blob_choices_ = new BLOB_CHOICE_LIST_CLIST();
this_blob_choices_it.set_to_list(this->blob_choices_);
source_blob_choices_it.set_to_list(source.blob_choices_);
for (source_blob_choices_it.mark_cycle_pt();
!source_blob_choices_it.cycled_list();
source_blob_choices_it.forward()) {
BLOB_CHOICE_LIST* blob_choices_copy = new BLOB_CHOICE_LIST();
blob_choices_copy->deep_copy(source_blob_choices_it.data(),
&BLOB_CHOICE::deep_copy);
this_blob_choices_it.add_after_then_move(blob_choices_copy);
}
}
return *this;
}

uinT8 WERD_CHOICE::permuter | ( |  | ) | const

inline

Definition at line 237 of file ratngs.h.

{
return permuter_;
}

const char * WERD_CHOICE::permuter_name | ( |  | ) | const

Definition at line 174 of file ratngs.cpp.

{
return kPermuterTypeNames[permuter_];
}

const void WERD_CHOICE::print | ( |  | ) | const

inline

Definition at line 406 of file ratngs.h.

{ this->print(""); }

const void WERD_CHOICE::print | ( | const char * | msg | ) | const

WERD_CHOICE::print

Print WERD_CHOICE to stdout.

Definition at line 457 of file ratngs.cpp.

{
tprintf("%s WERD_CHOICE:\n", msg);
tprintf("length_ %d reserved_ %d permuter_ %d\n",
length_, reserved_, permuter_);
tprintf("rating_ %.4f certainty_ %.4f", rating_, certainty_);
if (fragment_mark_) {
tprintf(" fragment_mark_ true");
}
tprintf("\n");
if (unichar_string_.length() > 0) {
tprintf("unichar_string_ %s unichar_lengths_ %s\n",
unichar_string_.string(), unichar_lengths_.string());
}
tprintf("unichar_ids: ");
int i;
for (i = 0; i < length_; ++i) {
tprintf("%d ", unichar_ids_[i]);
}
tprintf("\nfragment_lengths_: ");
for (i = 0; i < length_; ++i) {
tprintf("%d ", fragment_lengths_[i]);
}
tprintf("\n");
fflush(stdout);
}

void WERD_CHOICE::punct_stripped | ( | int * | start,
|  | int * | end
| ) |  | const

punct_stripped

Returns the half-open interval of unichar_id indices [start, end) which enclose the core portion of this word – the part after stripping punctuation from the left and right.

Definition at line 245 of file ratngs.cpp.

{
*start = 0;
*end = length() - 1;
while (*start < length() &&
unicharset()->get_ispunctuation(unichar_id(*start))) {
(*start)++;
}
while (*end > -1 &&
unicharset()->get_ispunctuation(unichar_id(*end))) {
(*end)--;
}
(*end)++;
}

float WERD_CHOICE::rating | ( |  | ) | const

inline

Definition at line 231 of file ratngs.h.

{
return rating_;
}

void WERD_CHOICE::remove_last_unichar_id | ( |  | ) |

inline

Definition at line 356 of file ratngs.h.

{ --length_; }

void WERD_CHOICE::remove_unichar_id | ( | int | index | ) |

inline

Definition at line 357 of file ratngs.h.

{
this->remove_unichar_ids(index, 1);
}

void WERD_CHOICE::remove_unichar_ids | ( | int | start,
|  | int | num
| ) |  |

remove_unichar_ids

Removes num unichar ids starting from index start from unichar_ids_ and updates length_ and fragment_lengths_ to reflect this change. Note: this function does not modify rating_ and certainty_.

Definition at line 213 of file ratngs.cpp.

{
ASSERT_HOST(start >= 0 && start + num <= length_);
for (int i = start; i+num < length_; ++i) {
unichar_ids_[i] = unichar_ids_[i+num];
fragment_lengths_[i] = fragment_lengths_[i+num];
}
length_ -= num;
}

void WERD_CHOICE::reverse_and_mirror_unichar_ids | ( |  | ) |

reverse_and_mirror_unichar_ids

Reverses and mirrors unichars in unichar_ids.

Definition at line 227 of file ratngs.cpp.

{
for (int i = 0; i < length_/2; ++i) {
UNICHAR_ID tmp_id = unichar_ids_[i];
unichar_ids_[i] = unicharset_->get_mirror(unichar_ids_[length_-1-i]);
unichar_ids_[length_-1-i] = unicharset_->get_mirror(tmp_id);
}
if (length_ % 2 != 0) {
unichar_ids_[length_/2] = unicharset_->get_mirror(unichar_ids_[length_/2]);
}
}

void WERD_CHOICE::set_blob_choices | ( | BLOB_CHOICE_LIST_CLIST * | blob_choices | ) |

WERD_CHOICE::set_blob_choices

Delete current blob_choices. Set the blob_choices to the given new list.

Definition at line 184 of file ratngs.cpp.

{
if (blob_choices_ != blob_choices) {
delete_blob_choices();
blob_choices_ = blob_choices;
}
}

void WERD_CHOICE::set_certainty | ( | float | new_val | ) |

inline

Definition at line 258 of file ratngs.h.

{
certainty_ = new_val;
}

void WERD_CHOICE::set_fragment_length | ( | char | flen,
|  | int | index
| ) |  |

inline

Definition at line 251 of file ratngs.h.

{
assert(index < length_);
fragment_lengths_[index] = flen;
}

void WERD_CHOICE::set_fragment_mark | ( | bool | new_fragment_mark | ) |

inline

Definition at line 264 of file ratngs.h.

{
fragment_mark_ = new_fragment_mark;
}

void WERD_CHOICE::set_length | ( | int | len | ) |

inline

Definition at line 270 of file ratngs.h.

{
ASSERT_HOST(reserved_ >= len);
length_ = len;
}

void WERD_CHOICE::set_permuter | ( | uinT8 | perm | ) |

inline

Definition at line 261 of file ratngs.h.

{
permuter_ = perm;
}

void WERD_CHOICE::set_rating | ( | float | new_val | ) |

inline

Definition at line 255 of file ratngs.h.

{
rating_ = new_val;
}

void WERD_CHOICE::set_unichar_id | ( | UNICHAR_ID | unichar_id,
|  | int | index
| ) |  |

inline

Definition at line 247 of file ratngs.h.

{
assert(index < length_);
unichar_ids_[index] = unichar_id;
}

void WERD_CHOICE::set_unichar_id | ( | UNICHAR_ID | unichar_id,
|  | char | fragment_length,
|  | float | rating,
|  | float | certainty,
|  | int | index
| ) |  |

inline

Definition at line 343 of file ratngs.h.

{
assert(index < length_);
unichar_ids_[index] = unichar_id;
fragment_lengths_[index] = fragment_length;
rating_ += rating;
if (certainty < certainty_) {
certainty_ = certainty;
}
}

bool WERD_CHOICE::set_unichars_in_script_order | ( | bool | in_script_order | ) |

inline

Definition at line 385 of file ratngs.h.

{
return unichars_in_script_order_ = in_script_order;
}

WERD_CHOICE WERD_CHOICE::shallow_copy | ( | int | start,
|  | int | end
| ) |  | const

Definition at line 259 of file ratngs.cpp.

{
ASSERT_HOST(start >= 0 && start <= length_);
ASSERT_HOST(end >= 0 && end <= length_);
if (end < start) { end = start; }
WERD_CHOICE retval(unicharset_, end - start);
for (int i = start; i < end; i++) {
retval.append_unichar_id_space_allocated(
unichar_ids_[i], fragment_lengths_[i], 0.0f, 0.0f);
}
return retval;
}

void WERD_CHOICE::string_and_lengths | ( | STRING * | word_str,
|  | STRING * | word_lengths_str
| ) |  | const

string_and_lengths

Populates the given word_str with unichars from unichar_ids and and word_lengths_str with the corresponding unichar lengths.

Definition at line 294 of file ratngs.cpp.

{
*word_str = "";
if (word_lengths_str != NULL) *word_lengths_str = "";
for (int i = 0; i < length_; ++i) {
const char *ch = unicharset_->id_to_unichar_ext(unichar_ids_[i]);
*word_str += ch;
if (word_lengths_str != NULL) {
*word_lengths_str += strlen(ch);
}
}
}

const UNICHAR_ID WERD_CHOICE::unichar_id | ( | int | index | ) | const

inline

Definition at line 220 of file ratngs.h.

{
assert(index < length_);
return unichar_ids_[index];
}

const UNICHAR_ID* WERD_CHOICE::unichar_ids | ( |  | ) | const

inline

Definition at line 217 of file ratngs.h.

{
return unichar_ids_;
}

const STRING& WERD_CHOICE::unichar_lengths | ( |  | ) | const

inline

Definition at line 402 of file ratngs.h.

{
this->string_and_lengths(&unichar_string_, &unichar_lengths_);
return unichar_lengths_;
}

const STRING& WERD_CHOICE::unichar_string | ( |  | ) | const

inline

Definition at line 395 of file ratngs.h.

{
this->string_and_lengths(&unichar_string_, &unichar_lengths_);
return unichar_string_;
}

bool WERD_CHOICE::unichars_in_script_order | ( |  | ) | const

inline

Definition at line 389 of file ratngs.h.

{
return unichars_in_script_order_;
}

const UNICHARSET* WERD_CHOICE::unicharset | ( |  | ) | const

inline

Definition at line 211 of file ratngs.h.

{
return unicharset_;
}

## Member Data Documentation

const float WERD_CHOICE::kBadRating = 100000.0

static

Definition at line 188 of file ratngs.h.

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

- /mnt/data/src/tesseract-ocr/ccstruct/ratngs.h
- /mnt/data/src/tesseract-ocr/ccstruct/ratngs.cpp