Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/classify/tessclassifier.cpp @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: tessclassifier.cpp
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3 // Description: Tesseract implementation of a ShapeClassifier.
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4 // Author: Ray Smith
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5 //
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6 // (C) Copyright 2011, 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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17 ///////////////////////////////////////////////////////////////////////
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19 #include "tessclassifier.h"
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21 #include "classify.h"
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22 #include "trainingsample.h"
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24 namespace tesseract {
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26 // Classifies the given [training] sample, writing to results.
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27 // See ShapeClassifier for a full description.
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28 int TessClassifier::UnicharClassifySample(const TrainingSample &sample, Image page_pix, int debug,
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29 UNICHAR_ID keep_this,
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30 std::vector<UnicharRating> *results) {
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31 const int old_matcher_level = classify_->matcher_debug_level;
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32 const int old_matcher_flags = classify_->matcher_debug_flags;
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33 const int old_classify_level = classify_->classify_debug_level;
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34 if (debug) {
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35 // Explicitly set values of various control parameters to generate debug
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36 // output if required, restoring the old values after classifying.
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37 classify_->matcher_debug_level.set_value(2);
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38 classify_->matcher_debug_flags.set_value(25);
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39 classify_->classify_debug_level.set_value(3);
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40 }
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41 classify_->CharNormTrainingSample(pruner_only_, keep_this, sample, results);
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42 if (debug) {
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43 classify_->matcher_debug_level.set_value(old_matcher_level);
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44 classify_->matcher_debug_flags.set_value(old_matcher_flags);
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45 classify_->classify_debug_level.set_value(old_classify_level);
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46 }
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47 return results->size();
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48 }
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49
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50 // Provides access to the ShapeTable that this classifier works with.
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51 const ShapeTable *TessClassifier::GetShapeTable() const {
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52 return classify_->shape_table();
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53 }
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54 // Provides access to the UNICHARSET that this classifier works with.
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55 // Only needs to be overridden if GetShapeTable() can return nullptr.
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56 const UNICHARSET &TessClassifier::GetUnicharset() const {
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57 return classify_->unicharset;
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58 }
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59
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60 // Displays classification as the given shape_id. Creates as many windows
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61 // as it feels fit, using index as a guide for placement. Adds any created
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62 // windows to the windows output and returns a new index that may be used
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63 // by any subsequent classifiers. Caller waits for the user to view and
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64 // then destroys the windows by clearing the vector.
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65 int TessClassifier::DisplayClassifyAs(const TrainingSample &sample, Image page_pix, int unichar_id,
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66 int index, std::vector<ScrollView *> &windows) {
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67 int shape_id = unichar_id;
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68 // TODO(rays) Fix this so it works with both flat and real shapetables.
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69 // if (GetShapeTable() != nullptr)
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70 // shape_id = BestShapeForUnichar(sample, page_pix, unichar_id, nullptr);
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71 if (shape_id < 0) {
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72 return index;
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73 }
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74 if (UnusedClassIdIn(classify_->PreTrainedTemplates, shape_id)) {
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75 tprintf("No built-in templates for class/shape %d\n", shape_id);
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76 return index;
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77 }
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78 #ifndef GRAPHICS_DISABLED
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79 classify_->ShowBestMatchFor(shape_id, sample.features(), sample.num_features());
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80 #endif
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81 return index;
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82 }
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83
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84 } // namespace tesseract