tesseract 4.1.1
Loading...
Searching...
No Matches
mftraining.cpp File Reference
#include <cmath>
#include <cstring>
#include <cstdio>
#include "classify.h"
#include "cluster.h"
#include "clusttool.h"
#include "commontraining.h"
#include "featdefs.h"
#include "fontinfo.h"
#include "genericvector.h"
#include "indexmapbidi.h"
#include "intproto.h"
#include "mastertrainer.h"
#include "mergenf.h"
#include "mf.h"
#include "ocrfeatures.h"
#include "oldlist.h"
#include "protos.h"
#include "shapetable.h"
#include "tessopt.h"
#include "tprintf.h"
#include "unicity_table.h"

Go to the source code of this file.

Macros

#define _USE_MATH_DEFINES
 

Functions

int main (int argc, char **argv)
 

Variables

const int kMaxShapeLabelLength = 10
 

Macro Definition Documentation

◆ _USE_MATH_DEFINES

#define _USE_MATH_DEFINES

Definition at line 24 of file mftraining.cpp.

Function Documentation

◆ main()

int main ( int  argc,
char **  argv 
)

This program reads in a text file consisting of feature samples from a training page in the following format:

   FontName UTF8-char-str xmin ymin xmax ymax page-number
    NumberOfFeatureTypes(N)
      FeatureTypeName1 NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
      FeatureTypeName2 NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
      ...
      FeatureTypeNameN NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
   FontName CharName ...

The result of this program is a binary inttemp file used by the OCR engine.

Parameters
argcnumber of command line arguments
argvarray of command line arguments
Returns
0 if no error occurred

Definition at line 209 of file mftraining.cpp.

209 {
210 tesseract::CheckSharedLibraryVersion();
211
212 ParseArguments(&argc, &argv);
213
214 ShapeTable* shape_table = nullptr;
215 STRING file_prefix;
216 // Load the training data.
217 MasterTrainer* trainer = tesseract::LoadTrainingData(argc, argv,
218 false,
219 &shape_table,
220 &file_prefix);
221 if (trainer == nullptr) return 1; // Failed.
222
223 // Setup an index mapping from the shapes in the shape table to the classes
224 // that will be trained. In keeping with the original design, each shape
225 // with the same list of unichars becomes a different class and the configs
226 // represent the different combinations of fonts.
227 IndexMapBiDi config_map;
228 SetupConfigMap(shape_table, &config_map);
229
230 WriteShapeTable(file_prefix, *shape_table);
231 // If the shape_table is flat, then either we didn't run shape clustering, or
232 // it did nothing, so we just output the trainer's unicharset.
233 // Otherwise shape_set will hold a fake unicharset with an entry for each
234 // shape in the shape table, and we will output that instead.
235 UNICHARSET shape_set;
236 const UNICHARSET* unicharset = &trainer->unicharset();
237 // If we ran shapeclustering (and it worked) then at least one shape will
238 // have multiple unichars, so we have to build a fake unicharset.
239 if (shape_table->AnyMultipleUnichars()) {
240 unicharset = &shape_set;
241 // Now build a fake unicharset for the compact shape space to keep the
242 // output modules happy that we are doing things correctly.
243 int num_shapes = config_map.CompactSize();
244 for (int s = 0; s < num_shapes; ++s) {
245 char shape_label[kMaxShapeLabelLength + 1];
246 snprintf(shape_label, kMaxShapeLabelLength, "sh%04d", s);
247 shape_set.unichar_insert(shape_label);
248 }
249 }
250
251 // Now train each config separately.
252 int num_configs = shape_table->NumShapes();
253 LIST mf_classes = NIL_LIST;
254 for (int s = 0; s < num_configs; ++s) {
255 int unichar_id, font_id;
256 if (unicharset == &shape_set) {
257 // Using fake unichar_ids from the config_map/shape_set.
258 unichar_id = config_map.SparseToCompact(s);
259 } else {
260 // Get the real unichar_id from the shape table/unicharset.
261 shape_table->GetFirstUnicharAndFont(s, &unichar_id, &font_id);
262 }
263 const char* class_label = unicharset->id_to_unichar(unichar_id);
264 mf_classes = ClusterOneConfig(s, class_label, mf_classes, *shape_table,
265 trainer);
266 }
267 STRING inttemp_file = file_prefix;
268 inttemp_file += "inttemp";
269 STRING pffmtable_file = file_prefix;
270 pffmtable_file += "pffmtable";
271 CLASS_STRUCT* float_classes = SetUpForFloat2Int(*unicharset, mf_classes);
272 // Now write the inttemp and pffmtable.
273 trainer->WriteInttempAndPFFMTable(trainer->unicharset(), *unicharset,
274 *shape_table, float_classes,
275 inttemp_file.string(),
276 pffmtable_file.string());
277 for (int c = 0; c < unicharset->size(); ++c) {
278 FreeClassFields(&float_classes[c]);
279 }
280 delete [] float_classes;
281 FreeLabeledClassList(mf_classes);
282 delete trainer;
283 delete shape_table;
284 printf("Done!\n");
285 if (!FLAGS_test_ch.empty()) {
286 // If we are displaying debug window(s), wait for the user to look at them.
287 printf("Hit return to exit...\n");
288 while (getchar() != '\n');
289 }
290 return 0;
291} /* main */
void FreeClassFields(CLASS_TYPE Class)
Definition: protos.cpp:138
#define NIL_LIST
Definition: oldlist.h:76
void FreeLabeledClassList(LIST ClassList)
CLASS_STRUCT * SetUpForFloat2Int(const UNICHARSET &unicharset, LIST LabeledClassList)
void ParseArguments(int *argc, char ***argv)
const int kMaxShapeLabelLength
Definition: mftraining.cpp:59
MasterTrainer * LoadTrainingData(int argc, const char *const *argv, bool replication, ShapeTable **shape_table, STRING *file_prefix)
void WriteShapeTable(const STRING &file_prefix, const ShapeTable &shape_table)
int CompactSize() const
Definition: indexmapbidi.h:61
int SparseToCompact(int sparse_index) const override
Definition: indexmapbidi.h:138
Definition: strngs.h:45
const char * string() const
Definition: strngs.cpp:194
void unichar_insert(const char *const unichar_repr, OldUncleanUnichars old_style)
Definition: unicharset.cpp:626
const char * id_to_unichar(UNICHAR_ID id) const
Definition: unicharset.cpp:291
int size() const
Definition: unicharset.h:341
bool AnyMultipleUnichars() const
Definition: shapetable.cpp:444
int NumShapes() const
Definition: shapetable.h:274
void GetFirstUnicharAndFont(int shape_id, int *unichar_id, int *font_id) const
Definition: shapetable.cpp:404
void WriteInttempAndPFFMTable(const UNICHARSET &unicharset, const UNICHARSET &shape_set, const ShapeTable &shape_table, CLASS_STRUCT *float_classes, const char *inttemp_file, const char *pffmtable_file)
const UNICHARSET & unicharset() const

Variable Documentation

◆ kMaxShapeLabelLength

const int kMaxShapeLabelLength = 10

Definition at line 59 of file mftraining.cpp.