annotate mupdf-source/thirdparty/tesseract/src/training/common/mastertrainer.h @ 17:dd9cdb856310

Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 // Copyright 2010 Google Inc. All Rights Reserved.
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2 // Author: rays@google.com (Ray Smith)
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3 ///////////////////////////////////////////////////////////////////////
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4 // File: mastertrainer.h
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5 // Description: Trainer to build the MasterClassifier.
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6 // Author: Ray Smith
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7 //
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8 // (C) Copyright 2010, Google Inc.
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9 // Licensed under the Apache License, Version 2.0 (the "License");
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10 // you may not use this file except in compliance with the License.
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11 // You may obtain a copy of the License at
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12 // http://www.apache.org/licenses/LICENSE-2.0
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13 // Unless required by applicable law or agreed to in writing, software
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14 // distributed under the License is distributed on an "AS IS" BASIS,
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15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 // See the License for the specific language governing permissions and
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17 // limitations under the License.
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18 //
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19 ///////////////////////////////////////////////////////////////////////
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21 #ifndef TESSERACT_TRAINING_MASTERTRAINER_H_
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22 #define TESSERACT_TRAINING_MASTERTRAINER_H_
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24 #include "export.h"
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26 #include "classify.h"
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27 #include "cluster.h"
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28 #include "elst.h"
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29 #include "errorcounter.h"
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30 #include "featdefs.h"
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31 #include "fontinfo.h"
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32 #include "indexmapbidi.h"
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33 #include "intfeaturemap.h"
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34 #include "intfeaturespace.h"
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35 #include "intfx.h"
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36 #include "intmatcher.h"
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37 #include "params.h"
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38 #include "shapetable.h"
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39 #include "trainingsample.h"
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40 #include "trainingsampleset.h"
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41 #include "unicharset.h"
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42
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43 namespace tesseract {
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45 class ShapeClassifier;
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46
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47 // Simple struct to hold the distance between two shapes during clustering.
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48 struct ShapeDist {
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49 ShapeDist() : shape1(0), shape2(0), distance(0.0f) {}
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50 ShapeDist(int s1, int s2, float dist) : shape1(s1), shape2(s2), distance(dist) {}
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51
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52 // Sort operator to sort in ascending order of distance.
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53 bool operator<(const ShapeDist &other) const {
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54 return distance < other.distance;
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55 }
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56
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57 int shape1;
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58 int shape2;
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59 float distance;
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60 };
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61
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62 // Class to encapsulate training processes that use the TrainingSampleSet.
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63 // Initially supports shape clustering and mftrainining.
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64 // Other important features of the MasterTrainer are conditioning the data
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65 // by outlier elimination, replication with perturbation, and serialization.
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66 class TESS_COMMON_TRAINING_API MasterTrainer {
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67 public:
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68 MasterTrainer(NormalizationMode norm_mode, bool shape_analysis, bool replicate_samples,
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69 int debug_level);
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70 ~MasterTrainer();
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71
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72 // Writes to the given file. Returns false in case of error.
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73 bool Serialize(FILE *fp) const;
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74
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75 // Loads an initial unicharset, or sets one up if the file cannot be read.
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76 void LoadUnicharset(const char *filename);
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77
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78 // Sets the feature space definition.
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79 void SetFeatureSpace(const IntFeatureSpace &fs) {
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80 feature_space_ = fs;
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81 feature_map_.Init(fs);
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82 }
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83
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84 // Reads the samples and their features from the given file,
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85 // adding them to the trainer with the font_id from the content of the file.
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86 // If verification, then these are verification samples, not training.
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87 void ReadTrainingSamples(const char *page_name, const FEATURE_DEFS_STRUCT &feature_defs,
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88 bool verification);
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89
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90 // Adds the given single sample to the trainer, setting the classid
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91 // appropriately from the given unichar_str.
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92 void AddSample(bool verification, const char *unichar_str, TrainingSample *sample);
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93
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94 // Loads all pages from the given tif filename and append to page_images_.
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95 // Must be called after ReadTrainingSamples, as the current number of images
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96 // is used as an offset for page numbers in the samples.
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97 void LoadPageImages(const char *filename);
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98
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99 // Cleans up the samples after initial load from the tr files, and prior to
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 // saving the MasterTrainer:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 // Remaps fragmented chars if running shape analysis.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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102 // Sets up the samples appropriately for class/fontwise access.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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103 // Deletes outlier samples.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 void PostLoadCleanup();
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parents:
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105
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parents:
diff changeset
106 // Gets the samples ready for training. Use after both
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 // ReadTrainingSamples+PostLoadCleanup or DeSerialize.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 // Re-indexes the features and computes canonical and cloud features.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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109 void PreTrainingSetup();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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110
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parents:
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111 // Sets up the master_shapes_ table, which tells which fonts should stay
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 // together until they get to a leaf node classifier.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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113 void SetupMasterShapes();
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114
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115 // Adds the junk_samples_ to the main samples_ set. Junk samples are initially
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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116 // fragments and n-grams (all incorrectly segmented characters).
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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117 // Various training functions may result in incorrectly segmented characters
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parents:
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118 // being added to the unicharset of the main samples, perhaps because they
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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119 // form a "radical" decomposition of some (Indic) grapheme, or because they
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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120 // just look the same as a real character (like rn/m)
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parents:
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121 // This function moves all the junk samples, to the main samples_ set, but
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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122 // desirable junk, being any sample for which the unichar already exists in
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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123 // the samples_ unicharset gets the unichar-ids re-indexed to match, but
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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124 // anything else gets re-marked as unichar_id 0 (space character) to identify
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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125 // it as junk to the error counter.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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126 void IncludeJunk();
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parents:
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127
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parents:
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128 // Replicates the samples and perturbs them if the enable_replication_ flag
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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129 // is set. MUST be used after the last call to OrganizeByFontAndClass on
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parents:
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130 // the training samples, ie after IncludeJunk if it is going to be used, as
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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131 // OrganizeByFontAndClass will eat the replicated samples into the regular
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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132 // samples.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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133 void ReplicateAndRandomizeSamplesIfRequired();
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parents:
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134
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parents:
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135 // Loads the basic font properties file into fontinfo_table_.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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136 // Returns false on failure.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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137 bool LoadFontInfo(const char *filename);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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138
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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139 // Loads the xheight font properties file into xheights_.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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140 // Returns false on failure.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 bool LoadXHeights(const char *filename);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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142
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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143 // Reads spacing stats from filename and adds them to fontinfo_table.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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144 // Returns false on failure.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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145 bool AddSpacingInfo(const char *filename);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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146
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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147 // Returns the font id corresponding to the given font name.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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148 // Returns -1 if the font cannot be found.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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149 int GetFontInfoId(const char *font_name);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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150 // Returns the font_id of the closest matching font name to the given
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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151 // filename. It is assumed that a substring of the filename will match
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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152 // one of the fonts. If more than one is matched, the longest is returned.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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153 int GetBestMatchingFontInfoId(const char *filename);
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parents:
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154
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parents:
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155 // Returns the filename of the tr file corresponding to the command-line
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 // argument with the given index.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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157 const std::string &GetTRFileName(int index) const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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158 return tr_filenames_[index];
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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159 }
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parents:
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160
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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161 // Sets up a flat shapetable with one shape per class/font combination.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 void SetupFlatShapeTable(ShapeTable *shape_table);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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163
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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164 // Sets up a Clusterer for mftraining on a single shape_id.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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165 // Call FreeClusterer on the return value after use.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 CLUSTERER *SetupForClustering(const ShapeTable &shape_table,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 const FEATURE_DEFS_STRUCT &feature_defs, int shape_id,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 int *num_samples);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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169
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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170 // Writes the given float_classes (produced by SetupForFloat2Int) as inttemp
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 // to the given inttemp_file, and the corresponding pffmtable.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 // The unicharset is the original encoding of graphemes, and shape_set should
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 // match the size of the shape_table, and may possibly be totally fake.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 void WriteInttempAndPFFMTable(const UNICHARSET &unicharset, const UNICHARSET &shape_set,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 const ShapeTable &shape_table, CLASS_STRUCT *float_classes,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 const char *inttemp_file, const char *pffmtable_file);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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177
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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178 const UNICHARSET &unicharset() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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179 return samples_.unicharset();
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parents:
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180 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 TrainingSampleSet *GetSamples() {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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182 return &samples_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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183 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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184 const ShapeTable &master_shapes() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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185 return master_shapes_;
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parents:
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186 }
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parents:
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187
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parents:
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188 // Generates debug output relating to the canonical distance between the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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189 // two given UTF8 grapheme strings.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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190 void DebugCanonical(const char *unichar_str1, const char *unichar_str2);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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191 #ifndef GRAPHICS_DISABLED
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parents:
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192 // Debugging for cloud/canonical features.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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193 // Displays a Features window containing:
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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194 // If unichar_str2 is in the unicharset, and canonical_font is non-negative,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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195 // displays the canonical features of the char/font combination in red.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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196 // If unichar_str1 is in the unicharset, and cloud_font is non-negative,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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197 // displays the cloud feature of the char/font combination in green.
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198 // The canonical features are drawn first to show which ones have no
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199 // matches in the cloud features.
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200 // Until the features window is destroyed, each click in the features window
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201 // will display the samples that have that feature in a separate window.
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202 void DisplaySamples(const char *unichar_str1, int cloud_font, const char *unichar_str2,
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203 int canonical_font);
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204 #endif // !GRAPHICS_DISABLED
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205
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206 void TestClassifierVOld(bool replicate_samples, ShapeClassifier *test_classifier,
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207 ShapeClassifier *old_classifier);
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208
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209 // Tests the given test_classifier on the internal samples.
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210 // See TestClassifier for details.
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211 void TestClassifierOnSamples(CountTypes error_mode, int report_level, bool replicate_samples,
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212 ShapeClassifier *test_classifier, std::string *report_string);
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213 // Tests the given test_classifier on the given samples
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214 // error_mode indicates what counts as an error.
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215 // report_levels:
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216 // 0 = no output.
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217 // 1 = bottom-line error rate.
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218 // 2 = bottom-line error rate + time.
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219 // 3 = font-level error rate + time.
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220 // 4 = list of all errors + short classifier debug output on 16 errors.
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221 // 5 = list of all errors + short classifier debug output on 25 errors.
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222 // If replicate_samples is true, then the test is run on an extended test
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223 // sample including replicated and systematically perturbed samples.
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224 // If report_string is non-nullptr, a summary of the results for each font
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225 // is appended to the report_string.
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226 double TestClassifier(CountTypes error_mode, int report_level, bool replicate_samples,
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227 TrainingSampleSet *samples, ShapeClassifier *test_classifier,
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228 std::string *report_string);
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229
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230 // Returns the average (in some sense) distance between the two given
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231 // shapes, which may contain multiple fonts and/or unichars.
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232 // This function is public to facilitate testing.
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233 float ShapeDistance(const ShapeTable &shapes, int s1, int s2);
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234
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235 private:
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236 // Replaces samples that are always fragmented with the corresponding
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237 // fragment samples.
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238 void ReplaceFragmentedSamples();
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239
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240 // Runs a hierarchical agglomerative clustering to merge shapes in the given
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241 // shape_table, while satisfying the given constraints:
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242 // * End with at least min_shapes left in shape_table,
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243 // * No shape shall have more than max_shape_unichars in it,
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244 // * Don't merge shapes where the distance between them exceeds max_dist.
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245 void ClusterShapes(int min_shapes, int max_shape_unichars, float max_dist,
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246 ShapeTable *shape_table);
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247
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248 private:
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249 NormalizationMode norm_mode_;
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250 // Character set we are training for.
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251 UNICHARSET unicharset_;
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252 // Original feature space. Subspace mapping is contained in feature_map_.
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253 IntFeatureSpace feature_space_;
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254 TrainingSampleSet samples_;
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255 TrainingSampleSet junk_samples_;
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256 TrainingSampleSet verify_samples_;
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257 // Master shape table defines what fonts stay together until the leaves.
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258 ShapeTable master_shapes_;
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259 // Flat shape table has each unichar/font id pair in a separate shape.
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260 ShapeTable flat_shapes_;
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261 // Font metrics gathered from multiple files.
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262 FontInfoTable fontinfo_table_;
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263 // Array of xheights indexed by font ids in fontinfo_table_;
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264 std::vector<int32_t> xheights_;
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265
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266 // Non-serialized data initialized by other means or used temporarily
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267 // during loading of training samples.
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268 // Number of different class labels in unicharset_.
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269 int charsetsize_;
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270 // Flag to indicate that we are running shape analysis and need fragments
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271 // fixing.
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272 bool enable_shape_analysis_;
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273 // Flag to indicate that sample replication is required.
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274 bool enable_replication_;
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275 // Array of classids of fragments that replace the correctly segmented chars.
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276 int *fragments_;
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277 // Classid of previous correctly segmented sample that was added.
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278 int prev_unichar_id_;
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279 // Debug output control.
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280 int debug_level_;
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281 // Feature map used to construct reduced feature spaces for compact
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282 // classifiers.
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283 IntFeatureMap feature_map_;
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284 // Vector of Pix pointers used for classifiers that need the image.
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285 // Indexed by page_num_ in the samples.
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286 // These images are owned by the trainer and need to be pixDestroyed.
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287 std::vector<Image > page_images_;
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288 // Vector of filenames of loaded tr files.
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289 std::vector<std::string> tr_filenames_;
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290 };
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291
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292 } // namespace tesseract.
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293
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294 #endif // TESSERACT_TRAINING_MASTERTRAINER_H_