Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/lstm/fullyconnected.cpp @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: fullyconnected.cpp
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3 // Description: Simple feed-forward layer with various non-linearities.
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4 // Author: Ray Smith
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5 //
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6 // (C) Copyright 2014, Google Inc.
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7 // Licensed under the Apache License, Version 2.0 (the "License");
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8 // you may not use this file except in compliance with the License.
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9 // You may obtain a copy of the License at
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10 // http://www.apache.org/licenses/LICENSE-2.0
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11 // Unless required by applicable law or agreed to in writing, software
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12 // distributed under the License is distributed on an "AS IS" BASIS,
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13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 // See the License for the specific language governing permissions and
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15 // limitations under the License.
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16 ///////////////////////////////////////////////////////////////////////
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18 #ifdef HAVE_CONFIG_H
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19 # include "config_auto.h"
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20 #endif
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22 #include "fullyconnected.h"
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24 #ifdef _OPENMP
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25 # include <omp.h>
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26 #endif
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27 #include <cstdio>
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28 #include <cstdlib>
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30 #include "functions.h"
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31 #include "networkscratch.h"
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32
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33 // Number of threads to use for parallel calculation of Forward and Backward.
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34 #ifdef _OPENMP
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35 const int kNumThreads = 4;
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36 #else
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37 const int kNumThreads = 1;
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38 #endif
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40 namespace tesseract {
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41
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42 FullyConnected::FullyConnected(const std::string &name, int ni, int no, NetworkType type)
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43 : Network(type, name, ni, no), external_source_(nullptr), int_mode_(false) {}
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45 // Returns the shape output from the network given an input shape (which may
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46 // be partially unknown ie zero).
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47 StaticShape FullyConnected::OutputShape(const StaticShape &input_shape) const {
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48 LossType loss_type = LT_NONE;
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49 if (type_ == NT_SOFTMAX) {
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50 loss_type = LT_CTC;
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51 } else if (type_ == NT_SOFTMAX_NO_CTC) {
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52 loss_type = LT_SOFTMAX;
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53 } else if (type_ == NT_LOGISTIC) {
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54 loss_type = LT_LOGISTIC;
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55 }
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56 StaticShape result(input_shape);
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57 result.set_depth(no_);
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58 result.set_loss_type(loss_type);
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59 return result;
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60 }
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61
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62 // Suspends/Enables training by setting the training_ flag.
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63 void FullyConnected::SetEnableTraining(TrainingState state) {
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64 if (state == TS_RE_ENABLE) {
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65 // Enable only from temp disabled.
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66 if (training_ == TS_TEMP_DISABLE) {
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67 training_ = TS_ENABLED;
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68 }
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69 } else if (state == TS_TEMP_DISABLE) {
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70 // Temp disable only from enabled.
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71 if (training_ == TS_ENABLED) {
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72 training_ = state;
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73 }
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74 } else {
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75 if (state == TS_ENABLED && training_ != TS_ENABLED) {
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76 weights_.InitBackward();
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77 }
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78 training_ = state;
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79 }
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80 }
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81
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82 // Sets up the network for training. Initializes weights using weights of
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83 // scale `range` picked according to the random number generator `randomizer`.
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84 int FullyConnected::InitWeights(float range, TRand *randomizer) {
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85 Network::SetRandomizer(randomizer);
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86 num_weights_ = weights_.InitWeightsFloat(no_, ni_ + 1, TestFlag(NF_ADAM), range, randomizer);
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87 return num_weights_;
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88 }
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89
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90 // Recursively searches the network for softmaxes with old_no outputs,
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91 // and remaps their outputs according to code_map. See network.h for details.
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92
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93 int FullyConnected::RemapOutputs(int old_no, const std::vector<int> &code_map) {
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94 if (type_ == NT_SOFTMAX && no_ == old_no) {
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95 num_weights_ = weights_.RemapOutputs(code_map);
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96 no_ = code_map.size();
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97 }
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98 return num_weights_;
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99 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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100
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 // Converts a float network to an int network.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 void FullyConnected::ConvertToInt() {
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 weights_.ConvertToInt();
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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104 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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105
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 // Provides debug output on the weights.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 void FullyConnected::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
108 weights_.Debug2D(name_.c_str());
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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109 }
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parents:
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110
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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111 // Writes to the given file. Returns false in case of error.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 bool FullyConnected::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
113 if (!Network::Serialize(fp)) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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114 return false;
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115 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
116 if (!weights_.Serialize(IsTraining(), fp)) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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117 return false;
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118 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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119 return true;
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120 }
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121
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Franz Glasner <fzglas.hg@dom66.de>
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122 // Reads from the given file. Returns false in case of error.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
123 bool FullyConnected::DeSerialize(TFile *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>
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124 return weights_.DeSerialize(IsTraining(), fp);
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125 }
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126
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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127 // Runs forward propagation of activations on the input line.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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128 // See NetworkCpp for a detailed discussion of the arguments.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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129 void FullyConnected::Forward(bool debug, const NetworkIO &input,
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130 const TransposedArray *input_transpose, NetworkScratch *scratch,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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131 NetworkIO *output) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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132 int width = input.Width();
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parents:
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133 if (type_ == NT_SOFTMAX) {
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134 output->ResizeFloat(input, no_);
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parents:
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135 } else {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 output->Resize(input, no_);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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137 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 SetupForward(input, input_transpose);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
139 std::vector<NetworkScratch::FloatVec> temp_lines(kNumThreads);
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
140 std::vector<NetworkScratch::FloatVec> curr_input(kNumThreads);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 int ro = no_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142 if (IntSimdMatrix::intSimdMatrix) {
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
143 ro = IntSimdMatrix::intSimdMatrix->RoundOutputs(ro);
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Franz Glasner <fzglas.hg@dom66.de>
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144 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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145 for (int i = 0; i < kNumThreads; ++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 temp_lines[i].Init(ro, scratch);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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147 curr_input[i].Init(ni_, scratch);
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Franz Glasner <fzglas.hg@dom66.de>
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148 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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149 #ifdef _OPENMP
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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150 # pragma omp parallel for num_threads(kNumThreads)
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parents:
diff changeset
151 for (int t = 0; t < width; ++t) {
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parents:
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152 // Thread-local pointer to temporary storage.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 int thread_id = omp_get_thread_num();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154 #else
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 for (int t = 0; t < width; ++t) {
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
156 // Thread-local pointer to temporary storage.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 int thread_id = 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158 #endif
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 TFloat *temp_line = temp_lines[thread_id];
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 if (input.int_mode()) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 ForwardTimeStep(input.i(t), t, temp_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
162 } else {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 input.ReadTimeStep(t, curr_input[thread_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
164 ForwardTimeStep(curr_input[thread_id], t, temp_line);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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165 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 output->WriteTimeStep(t, temp_line);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 if (IsTraining() && type_ != NT_SOFTMAX) {
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 acts_.CopyTimeStepFrom(t, *output, t);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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169 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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170 }
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 // Zero all the elements that are in the padding around images that allows
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 // multiple different-sized images to exist in a single array.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 // acts_ is only used if this is not a softmax op.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 if (IsTraining() && type_ != NT_SOFTMAX) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 acts_.ZeroInvalidElements();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 output->ZeroInvalidElements();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 #if DEBUG_DETAIL > 0
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179 tprintf("F Output:%s\n", name_.c_str());
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 output->Print(10);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 #endif
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 #ifndef GRAPHICS_DISABLED
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 if (debug) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 DisplayForward(*output);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 #endif
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 // Components of Forward so FullyConnected can be reused inside LSTM.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 void FullyConnected::SetupForward(const NetworkIO &input, const TransposedArray *input_transpose) {
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 // Softmax output is always float, so save the input type.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 int_mode_ = input.int_mode();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 if (IsTraining()) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 acts_.Resize(input, no_);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 // Source_ is a transposed copy of input. It isn't needed if provided.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
196 external_source_ = input_transpose;
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 if (external_source_ == 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
198 source_t_.ResizeNoInit(ni_, input.Width());
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
199 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200 }
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
201 }
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
202
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
203 void FullyConnected::ForwardTimeStep(int t, TFloat *output_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
204 if (type_ == NT_TANH) {
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
205 FuncInplace<GFunc>(no_, output_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
206 } else if (type_ == NT_LOGISTIC) {
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
207 FuncInplace<FFunc>(no_, output_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
208 } else if (type_ == NT_POSCLIP) {
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
209 FuncInplace<ClipFFunc>(no_, output_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
210 } else if (type_ == NT_SYMCLIP) {
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
211 FuncInplace<ClipGFunc>(no_, output_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
212 } else if (type_ == NT_RELU) {
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
213 FuncInplace<Relu>(no_, output_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
214 } else if (type_ == NT_SOFTMAX || type_ == NT_SOFTMAX_NO_CTC) {
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
215 SoftmaxInPlace(no_, output_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
216 } else if (type_ != NT_LINEAR) {
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
217 ASSERT_HOST("Invalid fully-connected type!" == 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
218 }
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
219 }
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
220
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
221 void FullyConnected::ForwardTimeStep(const TFloat *d_input, int t, TFloat *output_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
222 // input is copied to source_ line-by-line for cache coherency.
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
223 if (IsTraining() && external_source_ == 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
224 source_t_.WriteStrided(t, d_input);
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
225 }
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
226 weights_.MatrixDotVector(d_input, output_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
227 ForwardTimeStep(t, output_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
228 }
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
229
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
230 void FullyConnected::ForwardTimeStep(const int8_t *i_input, int t, TFloat *output_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
231 // input is copied to source_ line-by-line for cache coherency.
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
232 weights_.MatrixDotVector(i_input, output_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
233 ForwardTimeStep(t, output_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
234 }
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
235
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
236 // Runs backward propagation of errors on the deltas 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
237 // See NetworkCpp for a detailed discussion of the arguments.
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
238 bool FullyConnected::Backward(bool debug, const NetworkIO &fwd_deltas, NetworkScratch *scratch,
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
239 NetworkIO *back_deltas) {
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
240 #ifndef GRAPHICS_DISABLED
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
241 if (debug) {
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
242 DisplayBackward(fwd_deltas);
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
243 }
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
244 #endif
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
245 back_deltas->Resize(fwd_deltas, ni_);
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
246 std::vector<NetworkScratch::FloatVec> errors(kNumThreads);
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
247 for (int i = 0; i < kNumThreads; ++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
248 errors[i].Init(no_, scratch);
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
249 }
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
250 std::vector<NetworkScratch::FloatVec> temp_backprops;
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
251 if (needs_to_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
252 temp_backprops.resize(kNumThreads);
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
253 for (int i = 0; i < kNumThreads; ++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
254 temp_backprops[i].Init(ni_, scratch);
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
255 }
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
256 }
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
257 int width = fwd_deltas.Width();
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
258 NetworkScratch::GradientStore errors_t;
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
259 errors_t.Init(no_, width, scratch);
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
260 #ifdef _OPENMP
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
261 # pragma omp parallel for num_threads(kNumThreads)
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
262 for (int t = 0; t < width; ++t) {
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
263 int thread_id = omp_get_thread_num();
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
264 #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
265 for (int t = 0; t < width; ++t) {
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
266 int thread_id = 0;
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
267 #endif
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
268 TFloat *backprop = 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
269 if (needs_to_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
270 backprop = temp_backprops[thread_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
271 }
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
272 TFloat *curr_errors = errors[thread_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
273 BackwardTimeStep(fwd_deltas, t, curr_errors, errors_t.get(), 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
274 if (backprop != 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
275 back_deltas->WriteTimeStep(t, 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
276 }
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
277 }
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
278 FinishBackward(*errors_t.get());
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
279 if (needs_to_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
280 back_deltas->ZeroInvalidElements();
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
281 #if DEBUG_DETAIL > 0
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
282 tprintf("F Backprop:%s\n", name_.c_str());
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
283 back_deltas->Print(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
284 #endif
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
285 return 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:
diff changeset
286 }
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
287 return false; // No point going further back.
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
288 }
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
289
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
290 void FullyConnected::BackwardTimeStep(const NetworkIO &fwd_deltas, int t, TFloat *curr_errors,
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
291 TransposedArray *errors_t, TFloat *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
292 if (type_ == NT_TANH) {
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
293 acts_.FuncMultiply<GPrime>(fwd_deltas, t, curr_errors);
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
294 } else if (type_ == NT_LOGISTIC) {
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
295 acts_.FuncMultiply<FPrime>(fwd_deltas, t, curr_errors);
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
296 } else if (type_ == NT_POSCLIP) {
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
297 acts_.FuncMultiply<ClipFPrime>(fwd_deltas, t, curr_errors);
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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298 } else if (type_ == NT_SYMCLIP) {
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299 acts_.FuncMultiply<ClipGPrime>(fwd_deltas, t, curr_errors);
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300 } else if (type_ == NT_RELU) {
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301 acts_.FuncMultiply<ReluPrime>(fwd_deltas, t, curr_errors);
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302 } else if (type_ == NT_SOFTMAX || type_ == NT_SOFTMAX_NO_CTC || type_ == NT_LINEAR) {
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303 fwd_deltas.ReadTimeStep(t, curr_errors); // fwd_deltas are the errors.
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304 } else {
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305 ASSERT_HOST("Invalid fully-connected type!" == nullptr);
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306 }
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307 // Generate backprop only if needed by the lower layer.
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308 if (backprop != nullptr) {
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309 weights_.VectorDotMatrix(curr_errors, backprop);
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310 }
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311 errors_t->WriteStrided(t, curr_errors);
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312 }
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313
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314 void FullyConnected::FinishBackward(const TransposedArray &errors_t) {
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315 if (external_source_ == nullptr) {
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316 weights_.SumOuterTransposed(errors_t, source_t_, true);
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317 } else {
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318 weights_.SumOuterTransposed(errors_t, *external_source_, true);
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319 }
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320 }
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321
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322 // Updates the weights using the given learning rate, momentum and adam_beta.
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323 // num_samples is used in the adam computation iff use_adam_ is true.
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324 void FullyConnected::Update(float learning_rate, float momentum, float adam_beta, int num_samples) {
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325 weights_.Update(learning_rate, momentum, adam_beta, num_samples);
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326 }
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327
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328 // Sums the products of weight updates in *this and other, splitting into
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329 // positive (same direction) in *same and negative (different direction) in
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330 // *changed.
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331 void FullyConnected::CountAlternators(const Network &other, TFloat *same, TFloat *changed) const {
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332 ASSERT_HOST(other.type() == type_);
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333 const auto *fc = static_cast<const FullyConnected *>(&other);
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334 weights_.CountAlternators(fc->weights_, same, changed);
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335 }
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336
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337 } // namespace tesseract.