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comparison 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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1:1d09e1dec1d9 2:b50eed0cc0ef
1 // Copyright 2011 Google Inc. All Rights Reserved.
2 // Author: rays@google.com (Ray Smith)
3 ///////////////////////////////////////////////////////////////////////
4 // File: tessclassifier.h
5 // Description: Tesseract implementation of a ShapeClassifier.
6 // Author: Ray Smith
7 //
8 // (C) Copyright 2011, Google Inc.
9 // Licensed under the Apache License, Version 2.0 (the "License");
10 // you may not use this file except in compliance with the License.
11 // You may obtain a copy of the License at
12 // http://www.apache.org/licenses/LICENSE-2.0
13 // Unless required by applicable law or agreed to in writing, software
14 // distributed under the License is distributed on an "AS IS" BASIS,
15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 // See the License for the specific language governing permissions and
17 // limitations under the License.
18 //
19 ///////////////////////////////////////////////////////////////////////
20
21 #ifndef THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_
22 #define THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_
23
24 #include "shapeclassifier.h"
25
26 namespace tesseract {
27
28 class Classify;
29 class TrainingSample;
30
31 // Tesseract implementation of a ShapeClassifier.
32 // Due to limitations in the content of TrainingSample, this currently
33 // only works for the static classifier and only works if the ShapeTable
34 // in classify is not nullptr.
35 class TESS_API TessClassifier : public ShapeClassifier {
36 public:
37 TessClassifier(bool pruner_only, tesseract::Classify *classify)
38 : pruner_only_(pruner_only), classify_(classify) {}
39 ~TessClassifier() override = default;
40
41 // Classifies the given [training] sample, writing to results.
42 // See ShapeClassifier for a full description.
43 int UnicharClassifySample(const TrainingSample &sample, Image page_pix, int debug,
44 UNICHAR_ID keep_this, std::vector<UnicharRating> *results) override;
45 // Provides access to the ShapeTable that this classifier works with.
46 const ShapeTable *GetShapeTable() const override;
47 // Provides access to the UNICHARSET that this classifier works with.
48 // Only needs to be overridden if GetShapeTable() can return nullptr.
49 const UNICHARSET &GetUnicharset() const override;
50
51 // Displays classification as the given shape_id. Creates as many windows
52 // as it feels fit, using index as a guide for placement. Adds any created
53 // windows to the windows output and returns a new index that may be used
54 // by any subsequent classifiers. Caller waits for the user to view and
55 // then destroys the windows by clearing the vector.
56 int DisplayClassifyAs(const TrainingSample &sample, Image page_pix, int unichar_id, int index,
57 std::vector<ScrollView *> &windows) override;
58
59 private:
60 // Indicates that this classifier is to use just the ClassPruner, or the
61 // full classifier if false.
62 bool pruner_only_;
63 // Borrowed pointer to the actual Tesseract classifier.
64 tesseract::Classify *classify_;
65 };
66
67 } // namespace tesseract
68
69 #endif /* THIRD_PARTY_TESSERACT_CLASSIFY_TESSCLASSIFIER_H_ */