Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/lstm/plumbing.cpp @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: plumbing.cpp
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3 // Description: Base class for networks that organize other networks
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4 // eg series or parallel.
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5 // Author: Ray Smith
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6 //
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7 // (C) Copyright 2014, Google Inc.
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8 // Licensed under the Apache License, Version 2.0 (the "License");
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9 // you may not use this file except in compliance with the License.
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10 // You may obtain a copy of the License at
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11 // http://www.apache.org/licenses/LICENSE-2.0
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12 // Unless required by applicable law or agreed to in writing, software
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13 // distributed under the License is distributed on an "AS IS" BASIS,
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14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 // See the License for the specific language governing permissions and
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16 // limitations under the License.
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17 ///////////////////////////////////////////////////////////////////////
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19 #include "plumbing.h"
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21 namespace tesseract {
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23 // ni_ and no_ will be set by AddToStack.
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24 Plumbing::Plumbing(const std::string &name) : Network(NT_PARALLEL, name, 0, 0) {}
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26 // Suspends/Enables training by setting the training_ flag. Serialize and
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27 // DeSerialize only operate on the run-time data if state is false.
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28 void Plumbing::SetEnableTraining(TrainingState state) {
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29 Network::SetEnableTraining(state);
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30 for (auto &i : stack_) {
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31 i->SetEnableTraining(state);
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32 }
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33 }
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35 // Sets flags that control the action of the network. See NetworkFlags enum
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36 // for bit values.
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37 void Plumbing::SetNetworkFlags(uint32_t flags) {
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38 Network::SetNetworkFlags(flags);
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39 for (auto &i : stack_) {
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40 i->SetNetworkFlags(flags);
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41 }
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42 }
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44 // Sets up the network for training. Initializes weights using weights of
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45 // scale `range` picked according to the random number generator `randomizer`.
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46 // Note that randomizer is a borrowed pointer that should outlive the network
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47 // and should not be deleted by any of the networks.
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48 // Returns the number of weights initialized.
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49 int Plumbing::InitWeights(float range, TRand *randomizer) {
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50 num_weights_ = 0;
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51 for (auto &i : stack_) {
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52 num_weights_ += i->InitWeights(range, randomizer);
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53 }
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54 return num_weights_;
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55 }
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56
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57 // Recursively searches the network for softmaxes with old_no outputs,
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58 // and remaps their outputs according to code_map. See network.h for details.
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59 int Plumbing::RemapOutputs(int old_no, const std::vector<int> &code_map) {
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60 num_weights_ = 0;
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61 for (auto &i : stack_) {
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62 num_weights_ += i->RemapOutputs(old_no, code_map);
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63 }
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64 return num_weights_;
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65 }
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66
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67 // Converts a float network to an int network.
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68 void Plumbing::ConvertToInt() {
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69 for (auto &i : stack_) {
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70 i->ConvertToInt();
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71 }
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72 }
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73
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74 // Provides a pointer to a TRand for any networks that care to use it.
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75 // Note that randomizer is a borrowed pointer that should outlive the network
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76 // and should not be deleted by any of the networks.
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77 void Plumbing::SetRandomizer(TRand *randomizer) {
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78 for (auto &i : stack_) {
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79 i->SetRandomizer(randomizer);
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80 }
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81 }
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82
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83 // Adds the given network to the stack.
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84 void Plumbing::AddToStack(Network *network) {
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85 if (stack_.empty()) {
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86 ni_ = network->NumInputs();
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87 no_ = network->NumOutputs();
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88 } else if (type_ == NT_SERIES) {
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89 // ni is input of first, no output of last, others match output to input.
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90 ASSERT_HOST(no_ == network->NumInputs());
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91 no_ = network->NumOutputs();
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92 } else {
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93 // All parallel types. Output is sum of outputs, inputs all match.
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94 ASSERT_HOST(ni_ == network->NumInputs());
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95 no_ += network->NumOutputs();
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96 }
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97 stack_.push_back(network);
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98 }
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99
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 // Sets needs_to_backprop_ to needs_backprop and calls on sub-network
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 // according to needs_backprop || any weights in this network.
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
102 bool Plumbing::SetupNeedsBackprop(bool needs_backprop) {
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
103 if (IsTraining()) {
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 needs_to_backprop_ = needs_backprop;
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
105 bool retval = needs_backprop;
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
106 for (auto &i : stack_) {
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 if (i->SetupNeedsBackprop(needs_backprop)) {
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 retval = true;
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 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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110 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 return retval;
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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112 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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113 // Frozen networks don't do backprop.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
114 needs_to_backprop_ = false;
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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115 return false;
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 }
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parents:
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117
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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118 // Returns an integer reduction factor that the network applies to 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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119 // time sequence. Assumes that any 2-d is already eliminated. Used for
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 // scaling bounding boxes of truth data.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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121 // WARNING: if GlobalMinimax is used to vary the scale, this will return
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 // the last used scale factor. Call it before any forward, and it will return
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
123 // the minimum scale factor of the paths through the GlobalMinimax.
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
124 int Plumbing::XScaleFactor() 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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125 return stack_[0]->XScaleFactor();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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126 }
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parents:
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127
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parents:
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128 // Provides the (minimum) x scale factor to the network (of interest only to
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
129 // input units) so they can determine how to scale bounding boxes.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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130 void Plumbing::CacheXScaleFactor(int factor) {
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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131 for (auto &i : stack_) {
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 i->CacheXScaleFactor(factor);
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parents:
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133 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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134 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 // Provides debug output on the weights.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 void Plumbing::DebugWeights() {
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
138 for (auto &i : stack_) {
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
139 i->DebugWeights();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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140 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 // Returns a set of strings representing the layer-ids of all layers below.
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
144 void Plumbing::EnumerateLayers(const std::string *prefix, std::vector<std::string> &layers) 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:
diff changeset
145 for (size_t i = 0; i < stack_.size(); ++i) {
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
146 std::string layer_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:
diff changeset
147 if (prefix) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 layer_name = *prefix;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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149 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 layer_name += ":" + std::to_string(i);
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
151 if (stack_[i]->IsPlumbingType()) {
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
152 auto *plumbing = static_cast<Plumbing *>(stack_[i]);
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 plumbing->EnumerateLayers(&layer_name, layers);
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
154 } else {
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 layers.push_back(layer_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:
diff changeset
156 }
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
157 }
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 }
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
159
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
160 // Returns a pointer to the network layer corresponding to the given 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
161 Network *Plumbing::GetLayer(const char *id) 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:
diff changeset
162 char *next_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
163 int index = strtol(id, &next_id, 10);
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
164 if (index < 0 || static_cast<unsigned>(index) >= stack_.size()) {
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
165 return nullptr;
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 }
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 if (stack_[index]->IsPlumbingType()) {
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 auto *plumbing = static_cast<Plumbing *>(stack_[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:
diff changeset
169 ASSERT_HOST(*next_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
170 return plumbing->GetLayer(next_id + 1);
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 }
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 return stack_[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:
diff changeset
173 }
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
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 // Returns a pointer to the learning rate for the given layer 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
176 float *Plumbing::LayerLearningRatePtr(const char *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
177 char *next_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
178 int index = strtol(id, &next_id, 10);
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
179 if (index < 0 || static_cast<unsigned>(index) >= stack_.size()) {
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
180 return nullptr;
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
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 if (stack_[index]->IsPlumbingType()) {
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
183 auto *plumbing = static_cast<Plumbing *>(stack_[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:
diff changeset
184 ASSERT_HOST(*next_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
185 return plumbing->LayerLearningRatePtr(next_id + 1);
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
186 }
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
187 if (static_cast<unsigned>(index) >= learning_rates_.size()) {
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
188 return nullptr;
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
189 }
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
190 return &learning_rates_[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:
diff changeset
191 }
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
192
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
193 // Writes to the given file. Returns false in case of error.
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
194 bool Plumbing::Serialize(TFile *fp) 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:
diff changeset
195 if (!Network::Serialize(fp)) {
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
196 return false;
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
197 }
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
198 uint32_t size = stack_.size();
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
199 // Can't use PointerVector::Serialize here as we need a special 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
200 if (!fp->Serialize(&size)) {
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201 return false;
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202 }
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203 for (uint32_t i = 0; i < size; ++i) {
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204 if (!stack_[i]->Serialize(fp)) {
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205 return false;
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206 }
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207 }
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208 if ((network_flags_ & NF_LAYER_SPECIFIC_LR) && !fp->Serialize(learning_rates_)) {
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209 return false;
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210 }
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211 return true;
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212 }
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213
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214 // Reads from the given file. Returns false in case of error.
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215 bool Plumbing::DeSerialize(TFile *fp) {
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216 for (auto data : stack_) {
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217 delete data;
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218 }
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219 stack_.clear();
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220 no_ = 0; // We will be modifying this as we AddToStack.
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221 uint32_t size;
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222 if (!fp->DeSerialize(&size)) {
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223 return false;
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224 }
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225 for (uint32_t i = 0; i < size; ++i) {
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226 Network *network = CreateFromFile(fp);
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227 if (network == nullptr) {
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228 return false;
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229 }
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230 AddToStack(network);
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231 }
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232 if ((network_flags_ & NF_LAYER_SPECIFIC_LR) && !fp->DeSerialize(learning_rates_)) {
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233 return false;
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234 }
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235 return true;
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236 }
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237
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238 // Updates the weights using the given learning rate, momentum and adam_beta.
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239 // num_samples is used in the adam computation iff use_adam_ is true.
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240 void Plumbing::Update(float learning_rate, float momentum, float adam_beta, int num_samples) {
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241 for (size_t i = 0; i < stack_.size(); ++i) {
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242 if (network_flags_ & NF_LAYER_SPECIFIC_LR) {
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243 if (i < learning_rates_.size()) {
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244 learning_rate = learning_rates_[i];
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245 } else {
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246 learning_rates_.push_back(learning_rate);
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247 }
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248 }
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249 if (stack_[i]->IsTraining()) {
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250 stack_[i]->Update(learning_rate, momentum, adam_beta, num_samples);
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251 }
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252 }
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253 }
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254
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255 // Sums the products of weight updates in *this and other, splitting into
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256 // positive (same direction) in *same and negative (different direction) in
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257 // *changed.
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diff changeset
258 void Plumbing::CountAlternators(const Network &other, TFloat *same, TFloat *changed) const {
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259 ASSERT_HOST(other.type() == type_);
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260 const auto *plumbing = static_cast<const Plumbing *>(&other);
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diff changeset
261 ASSERT_HOST(plumbing->stack_.size() == stack_.size());
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diff changeset
262 for (size_t i = 0; i < stack_.size(); ++i) {
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parents:
diff changeset
263 stack_[i]->CountAlternators(*plumbing->stack_[i], same, changed);
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264 }
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265 }
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266
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267 } // namespace tesseract.