tesseract 4.1.1
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tesseract::UnicharAmbigs Class Reference

#include <ambigs.h>

Public Member Functions

 UnicharAmbigs ()=default
 
 ~UnicharAmbigs ()
 
const UnicharAmbigsVectordang_ambigs () const
 
const UnicharAmbigsVectorreplace_ambigs () const
 
void InitUnicharAmbigs (const UNICHARSET &unicharset, bool use_ambigs_for_adaption)
 
void LoadUniversal (const UNICHARSET &encoder_set, UNICHARSET *unicharset)
 
void LoadUnicharAmbigs (const UNICHARSET &encoder_set, TFile *ambigs_file, int debug_level, bool use_ambigs_for_adaption, UNICHARSET *unicharset)
 
const UnicharIdVectorOneToOneDefiniteAmbigs (UNICHAR_ID unichar_id) const
 
const UnicharIdVectorAmbigsForAdaption (UNICHAR_ID unichar_id) const
 
const UnicharIdVectorReverseAmbigsForAdaption (UNICHAR_ID unichar_id) const
 

Detailed Description

Definition at line 136 of file ambigs.h.

Constructor & Destructor Documentation

◆ UnicharAmbigs()

tesseract::UnicharAmbigs::UnicharAmbigs ( )
default

◆ ~UnicharAmbigs()

tesseract::UnicharAmbigs::~UnicharAmbigs ( )
inline

Definition at line 139 of file ambigs.h.

139 {
140 replace_ambigs_.delete_data_pointers();
141 dang_ambigs_.delete_data_pointers();
142 one_to_one_definite_ambigs_.delete_data_pointers();
143 }
void delete_data_pointers()

Member Function Documentation

◆ AmbigsForAdaption()

const UnicharIdVector * tesseract::UnicharAmbigs::AmbigsForAdaption ( UNICHAR_ID  unichar_id) const
inline

Definition at line 183 of file ambigs.h.

184 {
185 if (ambigs_for_adaption_.empty()) return nullptr;
186 return ambigs_for_adaption_[unichar_id];
187 }

◆ dang_ambigs()

const UnicharAmbigsVector & tesseract::UnicharAmbigs::dang_ambigs ( ) const
inline

Definition at line 145 of file ambigs.h.

145{ return dang_ambigs_; }

◆ InitUnicharAmbigs()

void tesseract::UnicharAmbigs::InitUnicharAmbigs ( const UNICHARSET unicharset,
bool  use_ambigs_for_adaption 
)

Definition at line 54 of file ambigs.cpp.

55 {
56 for (int i = 0; i < unicharset.size(); ++i) {
57 replace_ambigs_.push_back(nullptr);
58 dang_ambigs_.push_back(nullptr);
59 one_to_one_definite_ambigs_.push_back(nullptr);
60 if (use_ambigs_for_adaption) {
61 ambigs_for_adaption_.push_back(nullptr);
62 reverse_ambigs_for_adaption_.push_back(nullptr);
63 }
64 }
65}
int push_back(T object)
int size() const
Definition: unicharset.h:341

◆ LoadUnicharAmbigs()

void tesseract::UnicharAmbigs::LoadUnicharAmbigs ( const UNICHARSET encoder_set,
TFile ambigs_file,
int  debug_level,
bool  use_ambigs_for_adaption,
UNICHARSET unicharset 
)

Definition at line 75 of file ambigs.cpp.

79 {
80 int i, j;
81 UnicharIdVector *adaption_ambigs_entry;
82 if (debug_level) tprintf("Reading ambiguities\n");
83
84 int test_ambig_part_size;
85 int replacement_ambig_part_size;
86 // The space for buffer is allocated on the heap to avoid
87 // GCC frame size warning.
88 const int kBufferSize = 10 + 2 * kMaxAmbigStringSize;
89 char *buffer = new char[kBufferSize];
90 char replacement_string[kMaxAmbigStringSize];
91 UNICHAR_ID test_unichar_ids[MAX_AMBIG_SIZE + 1];
92 int line_num = 0;
93 int type = NOT_AMBIG;
94
95 // Determine the version of the ambigs file.
96 int version = 0;
97 ASSERT_HOST(ambig_file->FGets(buffer, kBufferSize) != nullptr &&
98 strlen(buffer) > 0);
99 if (*buffer == 'v') {
100 version = static_cast<int>(strtol(buffer+1, nullptr, 10));
101 ++line_num;
102 } else {
103 ambig_file->Rewind();
104 }
105 while (ambig_file->FGets(buffer, kBufferSize) != nullptr) {
106 chomp_string(buffer);
107 if (debug_level > 2) tprintf("read line %s\n", buffer);
108 ++line_num;
109 if (!ParseAmbiguityLine(line_num, version, debug_level, encoder_set,
110 buffer, &test_ambig_part_size, test_unichar_ids,
111 &replacement_ambig_part_size,
112 replacement_string, &type)) continue;
113 // Construct AmbigSpec and add it to the appropriate AmbigSpec_LIST.
114 auto *ambig_spec = new AmbigSpec();
115 if (!InsertIntoTable((type == REPLACE_AMBIG) ? replace_ambigs_
116 : dang_ambigs_,
117 test_ambig_part_size, test_unichar_ids,
118 replacement_ambig_part_size, replacement_string, type,
119 ambig_spec, unicharset))
120 continue;
121
122 // Update one_to_one_definite_ambigs_.
123 if (test_ambig_part_size == 1 &&
124 replacement_ambig_part_size == 1 && type == DEFINITE_AMBIG) {
125 if (one_to_one_definite_ambigs_[test_unichar_ids[0]] == nullptr) {
126 one_to_one_definite_ambigs_[test_unichar_ids[0]] = new UnicharIdVector();
127 }
128 one_to_one_definite_ambigs_[test_unichar_ids[0]]->push_back(
129 ambig_spec->correct_ngram_id);
130 }
131 // Update ambigs_for_adaption_.
132 if (use_ambigs_for_adaption) {
134 // Silently ignore invalid strings, as before, so it is safe to use a
135 // universal ambigs file.
136 if (unicharset->encode_string(replacement_string, true, &encoding,
137 nullptr, nullptr)) {
138 for (i = 0; i < test_ambig_part_size; ++i) {
139 if (ambigs_for_adaption_[test_unichar_ids[i]] == nullptr) {
140 ambigs_for_adaption_[test_unichar_ids[i]] = new UnicharIdVector();
141 }
142 adaption_ambigs_entry = ambigs_for_adaption_[test_unichar_ids[i]];
143 for (int r = 0; r < encoding.size(); ++r) {
144 UNICHAR_ID id_to_insert = encoding[r];
145 ASSERT_HOST(id_to_insert != INVALID_UNICHAR_ID);
146 // Add the new unichar id to adaption_ambigs_entry (only if the
147 // vector does not already contain it) keeping it in sorted order.
148 for (j = 0; j < adaption_ambigs_entry->size() &&
149 (*adaption_ambigs_entry)[j] > id_to_insert; ++j);
150 if (j < adaption_ambigs_entry->size()) {
151 if ((*adaption_ambigs_entry)[j] != id_to_insert) {
152 adaption_ambigs_entry->insert(id_to_insert, j);
153 }
154 } else {
155 adaption_ambigs_entry->push_back(id_to_insert);
156 }
157 }
158 }
159 }
160 }
161 }
162 delete[] buffer;
163
164 // Fill in reverse_ambigs_for_adaption from ambigs_for_adaption vector.
165 if (use_ambigs_for_adaption) {
166 for (i = 0; i < ambigs_for_adaption_.size(); ++i) {
167 adaption_ambigs_entry = ambigs_for_adaption_[i];
168 if (adaption_ambigs_entry == nullptr) continue;
169 for (j = 0; j < adaption_ambigs_entry->size(); ++j) {
170 UNICHAR_ID ambig_id = (*adaption_ambigs_entry)[j];
171 if (reverse_ambigs_for_adaption_[ambig_id] == nullptr) {
172 reverse_ambigs_for_adaption_[ambig_id] = new UnicharIdVector();
173 }
174 reverse_ambigs_for_adaption_[ambig_id]->push_back(i);
175 }
176 }
177 }
178
179 // Print what was read from the input file.
180 if (debug_level > 1) {
181 for (int tbl = 0; tbl < 2; ++tbl) {
182 const UnicharAmbigsVector &print_table =
183 (tbl == 0) ? replace_ambigs_ : dang_ambigs_;
184 for (i = 0; i < print_table.size(); ++i) {
185 AmbigSpec_LIST *lst = print_table[i];
186 if (lst == nullptr) continue;
187 if (!lst->empty()) {
188 tprintf("%s Ambiguities for %s:\n",
189 (tbl == 0) ? "Replaceable" : "Dangerous",
190 unicharset->debug_str(i).string());
191 }
192 AmbigSpec_IT lst_it(lst);
193 for (lst_it.mark_cycle_pt(); !lst_it.cycled_list(); lst_it.forward()) {
194 AmbigSpec *ambig_spec = lst_it.data();
195 tprintf("wrong_ngram:");
196 UnicharIdArrayUtils::print(ambig_spec->wrong_ngram, *unicharset);
197 tprintf("correct_fragments:");
198 UnicharIdArrayUtils::print(ambig_spec->correct_fragments, *unicharset);
199 }
200 }
201 }
202 if (use_ambigs_for_adaption) {
203 for (int vec_id = 0; vec_id < 2; ++vec_id) {
204 const GenericVector<UnicharIdVector *> &vec = (vec_id == 0) ?
205 ambigs_for_adaption_ : reverse_ambigs_for_adaption_;
206 for (i = 0; i < vec.size(); ++i) {
207 adaption_ambigs_entry = vec[i];
208 if (adaption_ambigs_entry != nullptr) {
209 tprintf("%sAmbigs for adaption for %s:\n",
210 (vec_id == 0) ? "" : "Reverse ",
211 unicharset->debug_str(i).string());
212 for (j = 0; j < adaption_ambigs_entry->size(); ++j) {
213 tprintf("%s ", unicharset->debug_str(
214 (*adaption_ambigs_entry)[j]).string());
215 }
216 tprintf("\n");
217 }
218 }
219 }
220 }
221 }
222}
#define MAX_AMBIG_SIZE
Definition: ambigs.h:31
#define ASSERT_HOST(x)
Definition: errcode.h:88
void chomp_string(char *str)
Definition: helpers.h:77
DLLSYM void tprintf(const char *format,...)
Definition: tprintf.cpp:35
int UNICHAR_ID
Definition: unichar.h:34
GenericVector< UNICHAR_ID > UnicharIdVector
Definition: ambigs.h:35
GenericVector< AmbigSpec_LIST * > UnicharAmbigsVector
Definition: ambigs.h:134
@ DEFINITE_AMBIG
Definition: ambigs.h:40
@ REPLACE_AMBIG
Definition: ambigs.h:39
@ NOT_AMBIG
Definition: ambigs.h:38
const int kMaxAmbigStringSize
Definition: ambigs.cpp:41
int size() const
Definition: genericvector.h:72
static void print(const UNICHAR_ID array[], const UNICHARSET &unicharset)
Definition: ambigs.h:91
const char * string() const
Definition: strngs.cpp:194
bool encode_string(const char *str, bool give_up_on_failure, GenericVector< UNICHAR_ID > *encoding, GenericVector< char > *lengths, int *encoded_length) const
Definition: unicharset.cpp:259
STRING debug_str(UNICHAR_ID id) const
Definition: unicharset.cpp:343

◆ LoadUniversal()

void tesseract::UnicharAmbigs::LoadUniversal ( const UNICHARSET encoder_set,
UNICHARSET unicharset 
)

Definition at line 68 of file ambigs.cpp.

69 {
70 TFile file;
71 if (!file.Open(kUniversalAmbigsFile, ksizeofUniversalAmbigsFile)) return;
72 LoadUnicharAmbigs(encoder_set, &file, 0, false, unicharset);
73}
const char kUniversalAmbigsFile[]
const int ksizeofUniversalAmbigsFile
void LoadUnicharAmbigs(const UNICHARSET &encoder_set, TFile *ambigs_file, int debug_level, bool use_ambigs_for_adaption, UNICHARSET *unicharset)
Definition: ambigs.cpp:75

◆ OneToOneDefiniteAmbigs()

const UnicharIdVector * tesseract::UnicharAmbigs::OneToOneDefiniteAmbigs ( UNICHAR_ID  unichar_id) const
inline

Definition at line 172 of file ambigs.h.

173 {
174 if (one_to_one_definite_ambigs_.empty()) return nullptr;
175 return one_to_one_definite_ambigs_[unichar_id];
176 }

◆ replace_ambigs()

const UnicharAmbigsVector & tesseract::UnicharAmbigs::replace_ambigs ( ) const
inline

Definition at line 146 of file ambigs.h.

146{ return replace_ambigs_; }

◆ ReverseAmbigsForAdaption()

const UnicharIdVector * tesseract::UnicharAmbigs::ReverseAmbigsForAdaption ( UNICHAR_ID  unichar_id) const
inline

Definition at line 192 of file ambigs.h.

193 {
194 if (reverse_ambigs_for_adaption_.empty()) return nullptr;
195 return reverse_ambigs_for_adaption_[unichar_id];
196 }

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