mirror/tesseract
1
0
Fork 0
mirror of https://github.com/tesseract-ocr/tesseract.git synced 2024-12-03 00:49:01 +08:00
Code Issues Actions 9 Packages Projects Releases Wiki Activity
3964660093
tesseract/training/mftraining.cpp
theraysmith 5b79487a8e Changes to training for 3.00 
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@302 d0cd1f9f-072b-0410-8dd7-cf729c803f20
2009-07-11 02:44:07 +00:00

641 lines
20 KiB
C++
Raw Blame History

/******************************************************************************
** Filename: mftraining.c
** Purpose: Separates training pages into files for each character.
** Strips from files only the features and there parameters of
the feature type mf.
** Author: Dan Johnson
** Revisment: Christy Russon
** Environment: HPUX 6.5
** Library: HPUX 6.5
** History: Fri Aug 18 08:53:50 1989, DSJ, Created.
** 5/25/90, DSJ, Adapted to multiple feature types.
** Tuesday, May 17, 1998 Changes made to make feature specific and
** simplify structures. First step in simplifying training process.
**
** (c) Copyright Hewlett-Packard Company, 1988.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
******************************************************************************/
/**----------------------------------------------------------------------------
Include Files and Type Defines
----------------------------------------------------------------------------**/
#include "oldlist.h"
#include "efio.h"
#include "emalloc.h"
#include "featdefs.h"
#include "tessopt.h"
#include "ocrfeatures.h"
#include "mf.h"
#include "general.h"
#include "clusttool.h"
#include "cluster.h"
#include "protos.h"
#include "ndminx.h"
#include "tprintf.h"
#include "const.h"
#include "mergenf.h"
#include "name2char.h"
#include "intproto.h"
#include "freelist.h"
#include "efio.h"
#include "danerror.h"
#include "globals.h"
#include "commontraining.h"
#include "unicity_table.h"
#include "genericvector.h"
#include "classify.h"
#include <string.h>
#include <stdio.h>
#define _USE_MATH_DEFINES
#include <math.h>
#ifdef WIN32
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#endif
#define PROGRAM_FEATURE_TYPE "mf"
#define MINSD (1.0f / 128.0f)
static const char* kInputUnicharsetFile = "unicharset";
static const char* kOutputUnicharsetFile = "mfunicharset";
/**----------------------------------------------------------------------------
Public Function Prototypes
----------------------------------------------------------------------------**/
int main (
int argc,
char **argv);
/**----------------------------------------------------------------------------
Private Function Prototypes
----------------------------------------------------------------------------**/
LIST ReadTrainingSamples (
FILE *File);
void WriteClusteredTrainingSamples (
char *Directory,
LIST ProtoList,
CLUSTERER *Clusterer,
LABELEDLIST CharSample);
/**/
void WriteMergedTrainingSamples(
char *Directory,
LIST ClassList);
void WriteMicrofeat(
char *Directory,
LIST ClassList);
void WriteProtos(
FILE* File,
MERGE_CLASS MergeClass);
void WriteConfigs(
FILE* File,
CLASS_TYPE Class);
/*
PARAMDESC *ConvertToPARAMDESC(
PARAM_DESC* Param_Desc,
int N);
*/
void WritePFFMTable(INT_TEMPLATES Templates, const char* filename);
// global variable to hold configuration parameters to control clustering
// -M 0.40 -B 0.05 -I 1.0 -C 1e-6.
CLUSTERCONFIG Config =
{ elliptical, 0.625, 0.05, 1.0, 1e-6, 0 };
/*----------------------------------------------------------------------------
Public Code
-----------------------------------------------------------------------------*/
void DisplayProtoList(const char* ch, LIST protolist) {
void* window = c_create_window("Char samples", 50, 200,
520, 520, -130.0, 130.0, -130.0, 130.0);
LIST proto = protolist;
iterate(proto) {
PROTOTYPE* prototype = reinterpret_cast<PROTOTYPE *>(first_node(proto));
if (prototype->Significant)
c_line_color_index(window, Green);
else if (prototype->NumSamples == 0)
c_line_color_index(window, Blue);
else if (prototype->Merged)
c_line_color_index(window, Magenta);
else
c_line_color_index(window, Red);
float x = CenterX(prototype->Mean);
float y = CenterY(prototype->Mean);
double angle = OrientationOf(prototype->Mean) * 2 * M_PI;
float dx = static_cast<float>(LengthOf(prototype->Mean) * cos(angle) / 2);
float dy = static_cast<float>(LengthOf(prototype->Mean) * sin(angle) / 2);
c_move(window, (x - dx) * 256, (y - dy) * 256);
c_draw(window, (x + dx) * 256, (y + dy) * 256);
if (prototype->Significant)
tprintf("Green proto at (%g,%g)+(%g,%g) %d samples\n",
x, y, dx, dy, prototype->NumSamples);
else if (prototype->NumSamples > 0 && !prototype->Merged)
tprintf("Red proto at (%g,%g)+(%g,%g) %d samples\n",
x, y, dx, dy, prototype->NumSamples);
}
c_make_current(window);
}
char* new_dup(const char* str) {
int len = strlen(str);
char* new_str = new char[len + 1];
strcpy(new_str, str);
return new_str;
}
/*---------------------------------------------------------------------------*/
int main (int argc, char **argv) {
/*
** Parameters:
** argc number of command line arguments
** argv array of command line arguments
** Globals: none
** Operation:
** This program reads in a text file consisting of feature
** samples from a training page in the following format:
**
** FontName CharName 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.
** Return: none
** Exceptions: none
** History: Fri Aug 18 08:56:17 1989, DSJ, Created.
** Mon May 18 1998, Christy Russson, Revistion started.
*/
char *PageName;
FILE *TrainingPage;
FILE *OutFile;
LIST CharList;
CLUSTERER *Clusterer = NULL;
LIST ProtoList = NIL;
LABELEDLIST CharSample;
PROTOTYPE *Prototype;
LIST ClassList = NIL;
int Cid, Pid;
PROTO Proto;
PROTO_STRUCT DummyProto;
BIT_VECTOR Config2;
MERGE_CLASS MergeClass;
INT_TEMPLATES IntTemplates;
LIST pCharList, pProtoList;
char Filename[MAXNAMESIZE];
tesseract::Classify classify;
ParseArguments (argc, argv);
if (InputUnicharsetFile == NULL) {
InputUnicharsetFile = kInputUnicharsetFile;
}
if (OutputUnicharsetFile == NULL) {
OutputUnicharsetFile = kOutputUnicharsetFile;
}
if (!unicharset_training.load_from_file(InputUnicharsetFile)) {
fprintf(stderr, "Failed to load unicharset from file %s\n"
"Building unicharset for mftraining from scratch...\n",
InputUnicharsetFile);
unicharset_training.clear();
// Space character needed to represent NIL classification.
unicharset_training.unichar_insert(" ");
}
if (InputFontInfoFile != NULL) {
FILE* f = fopen(InputFontInfoFile, "r");
if (f == NULL) {
fprintf(stderr, "Failed to load font_properties\n");
} else {
int italic, bold, fixed, serif, fraktur;
while (!feof(f)) {
FontInfo fontinfo;
fontinfo.name = new char[1024];
fontinfo.properties = 0;
if (fscanf(f, "%1024s %i %i %i %i %i\n", fontinfo.name,
&italic, &bold, &fixed, &serif, &fraktur) != 6)
continue;
fontinfo.properties =
(italic << 0) +
(bold << 1) +
(fixed << 2) +
(serif << 3) +
(fraktur << 4);
if (!classify.get_fontinfo_table().contains(fontinfo)) {
classify.get_fontinfo_table().push_back(fontinfo);
} else {
fprintf(stderr, "Font %s already defined\n", fontinfo.name);
return 1;
}
}
fclose(f);
}
}
while ((PageName = GetNextFilename(argc, argv)) != NULL) {
printf ("Reading %s ...\n", PageName);
char *short_name = strrchr(PageName, '/');
if (short_name == NULL)
short_name = PageName;
else
++short_name;
// filename is expected to be of the form [lang].[fontname].exp[num].tr
// If it is, then set short_name to be the [fontname]. Otherwise it is just
// the file basename with the .tr extension removed.
char *font_dot = strchr(short_name, '.');
char *exp_dot = (font_dot != NULL) ? strstr(font_dot, ".exp") : NULL;
if (font_dot != NULL && exp_dot != NULL && font_dot != exp_dot) {
short_name = new_dup(font_dot + 1);
short_name[exp_dot - font_dot - 1] = '\0';
} else {
short_name = new_dup(short_name);
int len = strlen(short_name);
if (!strcmp(short_name + len - 3, ".tr"))
short_name[len - 3] = '\0';
}
int fontinfo_id;
FontInfo fontinfo;
fontinfo.name = short_name;
fontinfo.properties = 0; // Not used to lookup in the table
if (!classify.get_fontinfo_table().contains(fontinfo)) {
fontinfo_id = classify.get_fontinfo_table().push_back(fontinfo);
printf("%s has no defined properties.\n", short_name);
} else {
fontinfo_id = classify.get_fontinfo_table().get_id(fontinfo);
// Update the properties field
fontinfo = classify.get_fontinfo_table().get(fontinfo_id);
delete[] short_name;
}
TrainingPage = Efopen (PageName, "r");
CharList = ReadTrainingSamples (TrainingPage);
fclose (TrainingPage);
//WriteTrainingSamples (Directory, CharList);
pCharList = CharList;
iterate(pCharList) {
//Cluster
CharSample = (LABELEDLIST) first_node (pCharList);
// printf ("\nClustering %s ...", CharSample->Label);
Clusterer = SetUpForClustering(CharSample, PROGRAM_FEATURE_TYPE);
Config.MagicSamples = CharSample->SampleCount;
ProtoList = ClusterSamples(Clusterer, &Config);
CleanUpUnusedData(ProtoList);
//Merge
MergeInsignificantProtos(ProtoList, CharSample->Label,
Clusterer, &Config);
if (strcmp(test_ch, CharSample->Label) == 0)
DisplayProtoList(test_ch, ProtoList);
ProtoList = RemoveInsignificantProtos(ProtoList, ShowSignificantProtos,
ShowInsignificantProtos,
Clusterer->SampleSize);
FreeClusterer(Clusterer);
MergeClass = FindClass (ClassList, CharSample->Label);
if (MergeClass == NULL) {
MergeClass = NewLabeledClass (CharSample->Label);
ClassList = push (ClassList, MergeClass);
}
Cid = AddConfigToClass(MergeClass->Class);
MergeClass->Class->font_set.push_back(fontinfo_id);
pProtoList = ProtoList;
iterate (pProtoList) {
Prototype = (PROTOTYPE *) first_node (pProtoList);
// see if proto can be approximated by existing proto
Pid = FindClosestExistingProto(MergeClass->Class,
MergeClass->NumMerged, Prototype);
if (Pid == NO_PROTO) {
Pid = AddProtoToClass (MergeClass->Class);
Proto = ProtoIn (MergeClass->Class, Pid);
MakeNewFromOld (Proto, Prototype);
MergeClass->NumMerged[Pid] = 1;
}
else {
MakeNewFromOld (&DummyProto, Prototype);
ComputeMergedProto (ProtoIn (MergeClass->Class, Pid), &DummyProto,
(FLOAT32) MergeClass->NumMerged[Pid], 1.0,
ProtoIn (MergeClass->Class, Pid));
MergeClass->NumMerged[Pid] ++;
}
Config2 = MergeClass->Class->Configurations[Cid];
AddProtoToConfig (Pid, Config2);
}
FreeProtoList (&ProtoList);
}
FreeTrainingSamples (CharList);
}
//WriteMergedTrainingSamples(Directory,ClassList);
WriteMicrofeat(Directory, ClassList);
SetUpForFloat2Int(ClassList);
IntTemplates = classify.CreateIntTemplates(TrainingData,
unicharset_training);
strcpy (Filename, "");
if (Directory != NULL) {
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, "inttemp");
#ifdef __UNIX__
OutFile = Efopen (Filename, "w");
#else
OutFile = Efopen (Filename, "wb");
#endif
classify.WriteIntTemplates(OutFile, IntTemplates, unicharset_training);
fclose (OutFile);
strcpy (Filename, "");
if (Directory != NULL) {
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, "pffmtable");
// Now create pffmtable.
WritePFFMTable(IntTemplates, Filename);
// Write updated unicharset to a file.
if (!unicharset_training.save_to_file(OutputUnicharsetFile)) {
fprintf(stderr, "Failed to save unicharset to file %s\n",
OutputUnicharsetFile);
exit(1);
}
printf ("Done!\n"); /**/
FreeLabeledClassList (ClassList);
return 0;
} /* main */
/**----------------------------------------------------------------------------
Private Code
----------------------------------------------------------------------------**/
/*---------------------------------------------------------------------------*/
LIST ReadTrainingSamples (
FILE *File)
/*
** Parameters:
** File open text file to read samples from
** Globals: none
** Operation:
** This routine reads training samples from a file and
** places them into a data structure which organizes the
** samples by FontName and CharName. It then returns this
** data structure.
** Return: none
** Exceptions: none
** History: Fri Aug 18 13:11:39 1989, DSJ, Created.
** Tue May 17 1998 simplifications to structure, illiminated
** font, and feature specification levels of structure.
*/
{
char unichar[UNICHAR_LEN + 1];
LABELEDLIST CharSample;
FEATURE_SET FeatureSamples;
LIST TrainingSamples = NIL;
CHAR_DESC CharDesc;
int Type, i;
while (fscanf (File, "%s %s", CTFontName, unichar) == 2) {
if (!unicharset_training.contains_unichar(unichar)) {
unicharset_training.unichar_insert(unichar);
if (unicharset_training.size() > MAX_NUM_CLASSES) {
cprintf("Error: Size of unicharset of mftraining is "
"greater than MAX_NUM_CLASSES\n");
exit(1);
}
}
CharSample = FindList (TrainingSamples, unichar);
if (CharSample == NULL) {
CharSample = NewLabeledList (unichar);
TrainingSamples = push (TrainingSamples, CharSample);
}
CharDesc = ReadCharDescription (File);
Type = ShortNameToFeatureType(PROGRAM_FEATURE_TYPE);
FeatureSamples = CharDesc->FeatureSets[Type];
for (int feature = 0; feature < FeatureSamples->NumFeatures; ++feature) {
FEATURE f = FeatureSamples->Features[feature];
for (int dim =0; dim < f->Type->NumParams; ++dim)
f->Params[dim] += dim == MFDirection ?
UniformRandomNumber(-MINSD_ANGLE, MINSD_ANGLE) :
UniformRandomNumber(-MINSD, MINSD);
}
CharSample->List = push (CharSample->List, FeatureSamples);
CharSample->SampleCount++;
for (i = 0; i < CharDesc->NumFeatureSets; i++)
if (Type != i)
FreeFeatureSet(CharDesc->FeatureSets[i]);
free (CharDesc);
}
return (TrainingSamples);
} /* ReadTrainingSamples */
/*----------------------------------------------------------------------------*/
void WriteClusteredTrainingSamples (
char *Directory,
LIST ProtoList,
CLUSTERER *Clusterer,
LABELEDLIST CharSample)
/*
** Parameters:
** Directory directory to place sample files into
** Operation:
** This routine writes the specified samples into files which
** are organized according to the font name and character name
** of the samples.
** Return: none
** Exceptions: none
** History: Fri Aug 18 16:17:06 1989, DSJ, Created.
*/
{
FILE *File;
char Filename[MAXNAMESIZE];
strcpy (Filename, "");
if (Directory != NULL)
{
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, CTFontName);
strcat (Filename, "/");
strcat (Filename, CharSample->Label);
strcat (Filename, ".");
strcat (Filename, PROGRAM_FEATURE_TYPE);
strcat (Filename, ".p");
printf ("\nWriting %s ...", Filename);
File = Efopen (Filename, "w");
WriteProtoList(File, Clusterer->SampleSize, Clusterer->ParamDesc,
ProtoList, ShowSignificantProtos, ShowInsignificantProtos);
fclose (File);
} /* WriteClusteredTrainingSamples */
/*---------------------------------------------------------------------------*/
void WriteMergedTrainingSamples(
char *Directory,
LIST ClassList)
{
FILE *File;
char Filename[MAXNAMESIZE];
MERGE_CLASS MergeClass;
iterate (ClassList)
{
MergeClass = (MERGE_CLASS) first_node (ClassList);
strcpy (Filename, "");
if (Directory != NULL)
{
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, "Merged/");
strcat (Filename, MergeClass->Label);
strcat (Filename, PROTO_SUFFIX);
printf ("\nWriting Merged %s ...", Filename);
File = Efopen (Filename, "w");
WriteOldProtoFile (File, MergeClass->Class);
fclose (File);
strcpy (Filename, "");
if (Directory != NULL)
{
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, "Merged/");
strcat (Filename, MergeClass->Label);
strcat (Filename, CONFIG_SUFFIX);
printf ("\nWriting Merged %s ...", Filename);
File = Efopen (Filename, "w");
WriteOldConfigFile (File, MergeClass->Class);
fclose (File);
}
} // WriteMergedTrainingSamples
/*--------------------------------------------------------------------------*/
void WriteMicrofeat(
char *Directory,
LIST ClassList)
{
FILE *File;
char Filename[MAXNAMESIZE];
MERGE_CLASS MergeClass;
strcpy (Filename, "");
if (Directory != NULL)
{
strcat (Filename, Directory);
strcat (Filename, "/");
}
strcat (Filename, "Microfeat");
File = Efopen (Filename, "w");
printf ("\nWriting Merged %s ...", Filename);
iterate(ClassList)
{
MergeClass = (MERGE_CLASS) first_node (ClassList);
WriteProtos(File, MergeClass);
WriteConfigs(File, MergeClass->Class);
}
fclose (File);
} // WriteMicrofeat
/*---------------------------------------------------------------------------*/
void WriteProtos(
FILE* File,
MERGE_CLASS MergeClass)
{
float Values[3];
int i;
PROTO Proto;
fprintf(File, "%s\n", MergeClass->Label);
fprintf(File, "%d\n", MergeClass->Class->NumProtos);
for(i=0; i < MergeClass->Class->NumProtos; i++)
{
Proto = ProtoIn(MergeClass->Class,i);
fprintf(File, "\t%8.4f %8.4f %8.4f %8.4f ", Proto->X, Proto->Y,
Proto->Length, Proto->Angle);
Values[0] = Proto->X;
Values[1] = Proto->Y;
Values[2] = Proto->Angle;
Normalize(Values);
fprintf(File, "%8.4f %8.4f %8.4f\n", Values[0], Values[1], Values[2]);
}
} // WriteProtos
/*----------------------------------------------------------------------------*/
void WriteConfigs(
FILE* File,
CLASS_TYPE Class)
{
BIT_VECTOR Config;
int i, j, WordsPerConfig;
WordsPerConfig = WordsInVectorOfSize(Class->NumProtos);
fprintf(File, "%d %d\n", Class->NumConfigs,WordsPerConfig);
for(i=0; i < Class->NumConfigs; i++)
{
Config = Class->Configurations[i];
for(j=0; j < WordsPerConfig; j++)
fprintf(File, "%08x ", Config[j]);
fprintf(File, "\n");
}
fprintf(File, "\n");
} // WriteConfigs
/*--------------------------------------------------------------------------*/
void WritePFFMTable(INT_TEMPLATES Templates, const char* filename) {
FILE* fp = Efopen(filename, "wb");
/* then write out each class */
for (int i = 0; i < Templates->NumClasses; i++) {
INT_CLASS Class = ClassForClassId (Templates, i);
// Todo: Test with min instead of max
// int MaxLength = LengthForConfigId(Class, 0);
int MaxLength = 0;
const char *unichar = unicharset_training.id_to_unichar(i);
if (strcmp(unichar, " ") == 0) {
unichar = "NULL";
} else if (Class->NumConfigs == 0) {
cprintf("Error: no configs for class %s in mftraining\n", unichar);
}
for (int ConfigId = 0; ConfigId < Class->NumConfigs; ConfigId++) {
// Todo: Test with min instead of max
// if (LengthForConfigId (Class, ConfigId) < MaxLength)
if (Class->ConfigLengths[ConfigId] > MaxLength)
MaxLength = Class->ConfigLengths[ConfigId];
}
fprintf(fp, "%s %d\n", unichar, MaxLength);
}
fclose(fp);
} // WritePFFMTable
Reference in New Issue View Git Blame Copy Permalink