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annotate mupdf-source/thirdparty/tesseract/src/training/unicharset/lstmtester.h @ 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
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children
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: lstmtester.h
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3 // Description: Top-level line evaluation class for LSTM-based networks.
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4 // Author: Ray Smith
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5 //
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6 // (C) Copyright 2016, 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 #ifndef TESSERACT_TRAINING_LSTMTESTER_H_
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19 #define TESSERACT_TRAINING_LSTMTESTER_H_
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21 #include "export.h"
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23 #include "lstmtrainer.h"
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25 #include <mutex>
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26 #include <string>
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27 #include <vector>
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29 namespace tesseract {
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31 class TESS_UNICHARSET_TRAINING_API LSTMTester {
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32 public:
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33 LSTMTester(int64_t max_memory);
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34
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35 // Loads a set of lstmf files that were created using the lstm.train config to
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36 // tesseract into memory ready for testing. Returns false if nothing was
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37 // loaded. The arg is a filename of a file that lists the filenames, with one
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38 // name per line. Conveniently, tesstrain.py generates such a file, along
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39 // with the files themselves.
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40 bool LoadAllEvalData(const char *filenames_file);
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41 // Loads a set of lstmf files that were created using the lstm.train config to
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42 // tesseract into memory ready for testing. Returns false if nothing was
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43 // loaded.
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44 bool LoadAllEvalData(const std::vector<std::string> &filenames);
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45
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46 // Runs an evaluation asynchronously on the stored eval data and returns a
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47 // string describing the results of the previous test. Args match TestCallback
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48 // declared in lstmtrainer.h:
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49 // iteration: Current learning iteration number.
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50 // training_errors: If not null, is an array of size ET_COUNT, indexed by
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51 // the ErrorTypes enum and indicates the current errors measured by the
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52 // trainer, and this is a serious request to run an evaluation. If null,
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53 // then the caller is just polling for the results of the previous eval.
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54 // model_data: is the model to evaluate, which should be a serialized
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55 // LSTMTrainer.
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56 // training_stage: an arbitrary number on the progress of training.
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57 std::string RunEvalAsync(int iteration, const double *training_errors,
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58 const TessdataManager &model_mgr, int training_stage);
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59 // Runs an evaluation synchronously on the stored eval data and returns a
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60 // string describing the results. Args as RunEvalAsync, except verbosity,
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61 // which outputs errors, if 1, or all results if 2.
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62 std::string RunEvalSync(int iteration, const double *training_errors, const TessdataManager &model_mgr,
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63 int training_stage, int verbosity);
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64
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65 private:
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66 // Helper thread function for RunEvalAsync.
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67 // LockIfNotRunning must have returned true before calling ThreadFunc, and
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68 // it will call UnlockRunning to release the lock after RunEvalSync completes.
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69 void ThreadFunc();
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70 // Returns true if there is currently nothing running, and takes the lock
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71 // if there is nothing running.
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72 bool LockIfNotRunning();
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73 // Releases the running lock.
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74 void UnlockRunning();
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75
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76 // The data to test with.
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77 DocumentCache test_data_;
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78 int total_pages_ = 0;
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79 // Flag that indicates an asynchronous test is currently running.
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80 // Protected by running_mutex_.
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81 bool async_running_ = false;
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82 std::mutex running_mutex_;
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83 // Stored copies of the args for use while running asynchronously.
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84 int test_iteration_ = 0;
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85 const double *test_training_errors_ = nullptr;
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86 TessdataManager test_model_mgr_;
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87 int test_training_stage_ = 0;
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88 std::string test_result_;
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89 };
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90
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91 } // namespace tesseract
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92
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93 #endif // TESSERACT_TRAINING_LSTMTESTER_H_