Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/training/combine_lang_model.cpp @ 41:71bcc18e306f

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MERGE: New upstream PyMuPDF v1.26.5 including MuPDF v1.26.10 BUGS: Needs some additional changes yet. Not yet tested.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 15:24:40 +0200
parents b50eed0cc0ef
children
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1 // Copyright 2017 Google Inc. All Rights Reserved.
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2 // Author: rays@google.com (Ray Smith)
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3 // Purpose: Program to generate a traineddata file that can be used to train an
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4 // LSTM-based neural network model from a unicharset and an optional
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5 // set of wordlists. Eliminates the need to run
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6 // set_unicharset_properties, wordlist2dawg, some non-existent binary
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7 // to generate the recoder, and finally combine_tessdata.
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9 // Licensed under the Apache License, Version 2.0 (the "License");
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10 // you may not use this file except in compliance with the License.
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11 // You may obtain a copy of the License at
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12 // http://www.apache.org/licenses/LICENSE-2.0
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13 // Unless required by applicable law or agreed to in writing, software
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14 // distributed under the License is distributed on an "AS IS" BASIS,
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15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 // See the License for the specific language governing permissions and
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17 // limitations under the License.
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19 #include "commandlineflags.h"
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20 #include "commontraining.h" // CheckSharedLibraryVersion
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21 #include "lang_model_helpers.h"
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22 #include "tesserrstream.h" // for tesserr
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23 #include "tprintf.h"
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24 #include "unicharset_training_utils.h"
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26 using namespace tesseract;
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28 static STRING_PARAM_FLAG(input_unicharset, "",
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29 "Filename with unicharset to complete and use in encoding");
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30 static STRING_PARAM_FLAG(script_dir, "", "Directory name for input script unicharsets");
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31 static STRING_PARAM_FLAG(words, "", "File listing words to use for the system dictionary");
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32 static STRING_PARAM_FLAG(puncs, "", "File listing punctuation patterns");
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33 static STRING_PARAM_FLAG(numbers, "", "File listing number patterns");
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34 static STRING_PARAM_FLAG(output_dir, "", "Root directory for output files");
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35 static STRING_PARAM_FLAG(version_str, "", "Version string to add to traineddata file");
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36 static STRING_PARAM_FLAG(lang, "", "Name of language being processed");
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37 static BOOL_PARAM_FLAG(lang_is_rtl, false, "True if lang being processed is written right-to-left");
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38 static BOOL_PARAM_FLAG(pass_through_recoder, false,
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39 "If true, the recoder is a simple pass-through of the "
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40 "unicharset. Otherwise, potentially a compression of it");
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42 int main(int argc, char **argv) {
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43 // Sets properties on the input unicharset file, and writes:
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44 // rootdir/lang/lang.charset_size=ddd.txt
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45 // rootdir/lang/lang.traineddata
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46 // rootdir/lang/lang.unicharset
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47 // If the 3 word lists are provided, the dawgs are also added
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48 // to the traineddata file.
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49 // The output unicharset and charset_size files are just for
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50 // human readability.
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51 tesseract::CheckSharedLibraryVersion();
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52 tesseract::ParseCommandLineFlags(argv[0], &argc, &argv, true);
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54 // If these reads fail, we get a warning message and an empty list of words.
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55 std::vector<std::string> words = split(tesseract::ReadFile(FLAGS_words.c_str()), '\n');
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56 std::vector<std::string> puncs = split(tesseract::ReadFile(FLAGS_puncs.c_str()), '\n');
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57 std::vector<std::string> numbers = split(tesseract::ReadFile(FLAGS_numbers.c_str()), '\n');
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58 // Load the input unicharset
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59 UNICHARSET unicharset;
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60 if (!unicharset.load_from_file(FLAGS_input_unicharset.c_str(), false)) {
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61 tprintf("Failed to load unicharset from %s\n", FLAGS_input_unicharset.c_str());
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62 return EXIT_FAILURE;
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63 }
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64 tesserr << "Loaded unicharset of size " << unicharset.size()
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65 << " from file " << FLAGS_input_unicharset.c_str() << '\n';
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67 // Set unichar properties
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68 tprintf("Setting unichar properties\n");
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69 tesseract::SetupBasicProperties(/*report_errors*/ true,
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70 /*decompose (NFD)*/ false, &unicharset);
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71 tprintf("Setting script properties\n");
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72 tesseract::SetScriptProperties(FLAGS_script_dir.c_str(), &unicharset);
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73 // Combine everything into a traineddata file.
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74 return tesseract::CombineLangModel(unicharset, FLAGS_script_dir.c_str(),
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75 FLAGS_version_str.c_str(), FLAGS_output_dir.c_str(),
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76 FLAGS_lang.c_str(), FLAGS_pass_through_recoder, words, puncs,
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77 numbers, FLAGS_lang_is_rtl, /*reader*/ nullptr,
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78 /*writer*/ nullptr);
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79 }