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annotate mupdf-source/thirdparty/tesseract/src/classify/tessclassifier.h @ 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 // Copyright 2011 Google Inc. All Rights Reserved.
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2 // Author: rays@google.com (Ray Smith)
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3 ///////////////////////////////////////////////////////////////////////
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4 // File: tessclassifier.h
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5 // Description: Tesseract implementation of a ShapeClassifier.
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6 // Author: Ray Smith
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7 //
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8 // (C) Copyright 2011, Google Inc.
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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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18 //
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19 ///////////////////////////////////////////////////////////////////////
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21 #ifndef THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_
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22 #define THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_
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24 #include "shapeclassifier.h"
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26 namespace tesseract {
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28 class Classify;
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29 class TrainingSample;
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31 // Tesseract implementation of a ShapeClassifier.
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32 // Due to limitations in the content of TrainingSample, this currently
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33 // only works for the static classifier and only works if the ShapeTable
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34 // in classify is not nullptr.
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35 class TESS_API TessClassifier : public ShapeClassifier {
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36 public:
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37 TessClassifier(bool pruner_only, tesseract::Classify *classify)
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38 : pruner_only_(pruner_only), classify_(classify) {}
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39 ~TessClassifier() override = default;
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41 // Classifies the given [training] sample, writing to results.
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42 // See ShapeClassifier for a full description.
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43 int UnicharClassifySample(const TrainingSample &sample, Image page_pix, int debug,
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44 UNICHAR_ID keep_this, std::vector<UnicharRating> *results) override;
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45 // Provides access to the ShapeTable that this classifier works with.
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46 const ShapeTable *GetShapeTable() const override;
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47 // Provides access to the UNICHARSET that this classifier works with.
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48 // Only needs to be overridden if GetShapeTable() can return nullptr.
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49 const UNICHARSET &GetUnicharset() const override;
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51 // Displays classification as the given shape_id. Creates as many windows
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52 // as it feels fit, using index as a guide for placement. Adds any created
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53 // windows to the windows output and returns a new index that may be used
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54 // by any subsequent classifiers. Caller waits for the user to view and
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55 // then destroys the windows by clearing the vector.
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56 int DisplayClassifyAs(const TrainingSample &sample, Image page_pix, int unichar_id, int index,
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57 std::vector<ScrollView *> &windows) override;
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58
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59 private:
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60 // Indicates that this classifier is to use just the ClassPruner, or the
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61 // full classifier if false.
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62 bool pruner_only_;
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63 // Borrowed pointer to the actual Tesseract classifier.
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64 tesseract::Classify *classify_;
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65 };
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67 } // namespace tesseract
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68
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69 #endif /* THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_ */