Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/training/mftraining.cpp @ 17:dd9cdb856310

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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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /******************************************************************************
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2 ** Filename: mftraining.c
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3 ** Purpose: Separates training pages into files for each character.
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4 ** Strips from files only the features and there parameters of
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5 ** the feature type mf.
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6 ** Author: Dan Johnson
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7 ** Revisment: Christy Russon
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8 **
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9 ** (c) Copyright Hewlett-Packard Company, 1988.
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10 ** Licensed under the Apache License, Version 2.0 (the "License");
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11 ** you may not use this file except in compliance with the License.
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12 ** You may obtain a copy of the License at
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13 ** http://www.apache.org/licenses/LICENSE-2.0
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14 ** Unless required by applicable law or agreed to in writing, software
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15 ** distributed under the License is distributed on an "AS IS" BASIS,
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16 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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17 ** See the License for the specific language governing permissions and
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18 ** limitations under the License.
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19 ******************************************************************************/
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20 /*----------------------------------------------------------------------------
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21 Include Files and Type Defines
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22 ----------------------------------------------------------------------------*/
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23
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24 #define _USE_MATH_DEFINES // for M_PI
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25 #ifdef HAVE_CONFIG_H
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26 # include "config_auto.h"
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27 #endif
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29 #include <cmath> // for M_PI
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30 #include <cstdio>
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31 #include <cstring>
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32
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33 #include "classify.h"
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34 #include "cluster.h"
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35 #include "clusttool.h"
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36 #include "commontraining.h"
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37 #include "featdefs.h"
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38 #include "fontinfo.h"
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39 #include "indexmapbidi.h"
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40 #include "intproto.h"
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41 #include "mastertrainer.h"
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42 #include "mergenf.h"
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43 #include "mf.h"
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44 #include "ocrfeatures.h"
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45 #include "oldlist.h"
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46 #include "protos.h"
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47 #include "shapetable.h"
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48 #include "tprintf.h"
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49 #include "unicity_table.h"
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50
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51 using namespace tesseract;
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52
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53 /*----------------------------------------------------------------------------
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54 Public Code
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55 -----------------------------------------------------------------------------*/
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56 #ifndef GRAPHICS_DISABLED
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57 static void DisplayProtoList(const char *ch, LIST protolist) {
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58 auto window = std::make_unique<ScrollView>("Char samples", 50, 200, 520, 520, 260, 260, true);
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59 LIST proto = protolist;
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60 iterate(proto) {
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61 auto *prototype = reinterpret_cast<PROTOTYPE *>(proto->first_node());
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62 if (prototype->Significant) {
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63 window->Pen(ScrollView::GREEN);
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64 } else if (prototype->NumSamples == 0) {
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65 window->Pen(ScrollView::BLUE);
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66 } else if (prototype->Merged) {
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67 window->Pen(ScrollView::MAGENTA);
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68 } else {
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69 window->Pen(ScrollView::RED);
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70 }
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71 float x = CenterX(prototype->Mean);
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72 float y = CenterY(prototype->Mean);
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73 double angle = OrientationOf(prototype->Mean) * 2 * M_PI;
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74 auto dx = static_cast<float>(LengthOf(prototype->Mean) * cos(angle) / 2);
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75 auto dy = static_cast<float>(LengthOf(prototype->Mean) * sin(angle) / 2);
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76 window->SetCursor((x - dx) * 256, (y - dy) * 256);
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77 window->DrawTo((x + dx) * 256, (y + dy) * 256);
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78 auto prototypeNumSamples = prototype->NumSamples;
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79 if (prototype->Significant) {
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80 tprintf("Green proto at (%g,%g)+(%g,%g) %d samples\n", x, y, dx, dy, prototypeNumSamples);
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81 } else if (prototype->NumSamples > 0 && !prototype->Merged) {
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82 tprintf("Red proto at (%g,%g)+(%g,%g) %d samples\n", x, y, dx, dy, prototypeNumSamples);
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83 }
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84 }
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85 window->Update();
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86 }
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87 #endif // !GRAPHICS_DISABLED
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88
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89 // Helper to run clustering on a single config.
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90 // Mostly copied from the old mftraining, but with renamed variables.
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91 static LIST ClusterOneConfig(int shape_id, const char *class_label, LIST mf_classes,
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92 const ShapeTable &shape_table, MasterTrainer *trainer) {
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93 int num_samples;
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94 CLUSTERER *clusterer =
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95 trainer->SetupForClustering(shape_table, feature_defs, shape_id, &num_samples);
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96 Config.MagicSamples = num_samples;
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97 LIST proto_list = ClusterSamples(clusterer, &Config);
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parents:
diff changeset
98 CleanUpUnusedData(proto_list);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
99
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100 // Merge protos where reasonable to make more of them significant by
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parents:
diff changeset
101 // representing almost all samples of the class/font.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 MergeInsignificantProtos(proto_list, class_label, clusterer, &Config);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
103 #ifndef GRAPHICS_DISABLED
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
104 if (strcmp(FLAGS_test_ch.c_str(), class_label) == 0) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 DisplayProtoList(FLAGS_test_ch.c_str(), proto_list);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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106 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 #endif // !GRAPHICS_DISABLED
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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108 // Delete the protos that will not be used in the inttemp output file.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 proto_list = RemoveInsignificantProtos(proto_list, true, false, clusterer->SampleSize);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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110 FreeClusterer(clusterer);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 MERGE_CLASS merge_class = FindClass(mf_classes, class_label);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 if (merge_class == nullptr) {
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113 merge_class = new MERGE_CLASS_NODE(class_label);
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Franz Glasner <fzglas.hg@dom66.de>
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114 mf_classes = push(mf_classes, merge_class);
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Franz Glasner <fzglas.hg@dom66.de>
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115 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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116 int config_id = AddConfigToClass(merge_class->Class);
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Franz Glasner <fzglas.hg@dom66.de>
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117 merge_class->Class->font_set.push_back(shape_id);
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Franz Glasner <fzglas.hg@dom66.de>
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118 LIST proto_it = proto_list;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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119 iterate(proto_it) {
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120 auto *prototype = reinterpret_cast<PROTOTYPE *>(proto_it->first_node());
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121 // See if proto can be approximated by existing proto.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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122 int p_id = FindClosestExistingProto(merge_class->Class, merge_class->NumMerged, prototype);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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123 if (p_id == NO_PROTO) {
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parents:
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124 // Need to make a new proto, as it doesn't match anything.
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parents:
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125 p_id = AddProtoToClass(merge_class->Class);
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parents:
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126 MakeNewFromOld(ProtoIn(merge_class->Class, p_id), prototype);
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127 merge_class->NumMerged[p_id] = 1;
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parents:
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128 } else {
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129 PROTO_STRUCT dummy_proto;
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parents:
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130 MakeNewFromOld(&dummy_proto, prototype);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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131 // Merge with the similar proto.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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132 ComputeMergedProto(ProtoIn(merge_class->Class, p_id), &dummy_proto,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
133 static_cast<float>(merge_class->NumMerged[p_id]), 1.0,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
134 ProtoIn(merge_class->Class, p_id));
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135 merge_class->NumMerged[p_id]++;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 AddProtoToConfig(p_id, merge_class->Class->Configurations[config_id]);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
139 FreeProtoList(&proto_list);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
140 return mf_classes;
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parents:
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141 }
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parents:
diff changeset
142
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parents:
diff changeset
143 // Helper to setup the config map.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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144 // Setup an index mapping from the shapes in the shape table to the classes
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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145 // that will be trained. In keeping with the original design, each shape
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 // with the same list of unichars becomes a different class and the configs
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 // represent the different combinations of fonts.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 static void SetupConfigMap(ShapeTable *shape_table, IndexMapBiDi *config_map) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149 int num_configs = shape_table->NumShapes();
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parents:
diff changeset
150 config_map->Init(num_configs, true);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
151 config_map->Setup();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 for (int c1 = 0; c1 < num_configs; ++c1) {
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
153 // Only process ids that are not already merged.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154 if (config_map->SparseToCompact(c1) == c1) {
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
155 Shape *shape1 = shape_table->MutableShape(c1);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 // Find all the subsequent shapes that are equal.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 for (int c2 = c1 + 1; c2 < num_configs; ++c2) {
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
158 if (shape_table->MutableShape(c2)->IsEqualUnichars(shape1)) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 config_map->Merge(c1, c2);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 config_map->CompleteMerges();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 }
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parents:
diff changeset
166
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 /**
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parents:
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168 * This program reads in a text file consisting of feature
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 * samples from a training page in the following format:
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 * @verbatim
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 FontName UTF8-char-str xmin ymin xmax ymax page-number
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 NumberOfFeatureTypes(N)
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parents:
diff changeset
173 FeatureTypeName1 NumberOfFeatures(M)
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parents:
diff changeset
174 Feature1
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parents:
diff changeset
175 ...
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parents:
diff changeset
176 FeatureM
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parents:
diff changeset
177 FeatureTypeName2 NumberOfFeatures(M)
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parents:
diff changeset
178 Feature1
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parents:
diff changeset
179 ...
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 FeatureM
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parents:
diff changeset
181 ...
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
182 FeatureTypeNameN NumberOfFeatures(M)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 Feature1
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parents:
diff changeset
184 ...
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:
diff changeset
185 FeatureM
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 FontName CharName ...
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 @endverbatim
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 * The result of this program is a binary inttemp file used by
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 * the OCR engine.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 * @param argc number of command line arguments
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 * @param argv array of command line arguments
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 * @return 0 if no error occurred
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 int main(int argc, char **argv) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 tesseract::CheckSharedLibraryVersion();
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parents:
diff changeset
196
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197 ParseArguments(&argc, &argv);
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198
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199 ShapeTable *shape_table = nullptr;
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200 std::string file_prefix;
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201 // Load the training data.
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202 auto trainer = tesseract::LoadTrainingData(argv + 1, false, &shape_table, file_prefix);
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203 if (trainer == nullptr) {
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204 return EXIT_FAILURE; // Failed.
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205 }
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206
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207 // Setup an index mapping from the shapes in the shape table to the classes
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208 // that will be trained. In keeping with the original design, each shape
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209 // with the same list of unichars becomes a different class and the configs
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210 // represent the different combinations of fonts.
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Franz Glasner <fzglas.hg@dom66.de>
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211 IndexMapBiDi config_map;
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Franz Glasner <fzglas.hg@dom66.de>
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212 SetupConfigMap(shape_table, &config_map);
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213
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214 WriteShapeTable(file_prefix, *shape_table);
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215 // If the shape_table is flat, then either we didn't run shape clustering, or
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216 // it did nothing, so we just output the trainer's unicharset.
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217 // Otherwise shape_set will hold a fake unicharset with an entry for each
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218 // shape in the shape table, and we will output that instead.
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219 UNICHARSET shape_set;
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220 const UNICHARSET *unicharset = &trainer->unicharset();
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221 // If we ran shapeclustering (and it worked) then at least one shape will
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222 // have multiple unichars, so we have to build a fake unicharset.
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223 if (shape_table->AnyMultipleUnichars()) {
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224 unicharset = &shape_set;
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225 // Now build a fake unicharset for the compact shape space to keep the
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226 // output modules happy that we are doing things correctly.
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227 int num_shapes = config_map.CompactSize();
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228 for (int s = 0; s < num_shapes; ++s) {
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229 char shape_label[14];
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230 snprintf(shape_label, sizeof(shape_label), "sh%04d", s);
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231 shape_set.unichar_insert(shape_label);
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232 }
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233 }
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234
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235 // Now train each config separately.
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Franz Glasner <fzglas.hg@dom66.de>
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236 int num_configs = shape_table->NumShapes();
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237 LIST mf_classes = NIL_LIST;
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238 for (int s = 0; s < num_configs; ++s) {
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239 int unichar_id, font_id;
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240 if (unicharset == &shape_set) {
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parents:
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241 // Using fake unichar_ids from the config_map/shape_set.
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242 unichar_id = config_map.SparseToCompact(s);
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243 } else {
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244 // Get the real unichar_id from the shape table/unicharset.
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Franz Glasner <fzglas.hg@dom66.de>
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245 shape_table->GetFirstUnicharAndFont(s, &unichar_id, &font_id);
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246 }
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247 const char *class_label = unicharset->id_to_unichar(unichar_id);
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Franz Glasner <fzglas.hg@dom66.de>
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248 mf_classes = ClusterOneConfig(s, class_label, mf_classes, *shape_table, trainer.get());
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249 }
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diff changeset
250 std::string inttemp_file = file_prefix;
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parents:
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251 inttemp_file += "inttemp";
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252 std::string pffmtable_file = std::move(file_prefix);
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253 pffmtable_file += "pffmtable";
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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254 CLASS_STRUCT *float_classes = SetUpForFloat2Int(*unicharset, mf_classes);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 // Now write the inttemp and pffmtable.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
256 trainer->WriteInttempAndPFFMTable(trainer->unicharset(), *unicharset, *shape_table, float_classes,
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parents:
diff changeset
257 inttemp_file.c_str(), pffmtable_file.c_str());
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
258 for (size_t c = 0; c < unicharset->size(); ++c) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
259 FreeClassFields(&float_classes[c]);
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260 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 delete[] float_classes;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
262 FreeLabeledClassList(mf_classes);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
263 delete shape_table;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264 printf("Done!\n");
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265 if (!FLAGS_test_ch.empty()) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 // If we are displaying debug window(s), wait for the user to look at them.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
267 printf("Hit return to exit...\n");
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parents:
diff changeset
268 while (getchar() != '\n') {
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parents:
diff changeset
269 ;
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parents:
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270 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
271 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
272 return EXIT_SUCCESS;
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parents:
diff changeset
273 } /* main */