Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/tesseract/src/textord/equationdetectbase.h @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 ///////////////////////////////////////////////////////////////////////
2 // File: equationdetectbase.h
3 // Description: The base class equation detection class.
4 // Author: Zongyi (Joe) Liu (joeliu@google.com)
5 // Created: Fri Aug 31 11:13:01 PST 2011
6 //
7 // (C) Copyright 2011, Google Inc.
8 // Licensed under the Apache License, Version 2.0 (the "License");
9 // you may not use this file except in compliance with the License.
10 // You may obtain a copy of the License at
11 // http://www.apache.org/licenses/LICENSE-2.0
12 // Unless required by applicable law or agreed to in writing, software
13 // distributed under the License is distributed on an "AS IS" BASIS,
14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 // See the License for the specific language governing permissions and
16 // limitations under the License.
17 //
18 ///////////////////////////////////////////////////////////////////////
19
20 #ifndef TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
21 #define TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
22
23 #include "image.h"
24
25 class BLOBNBOX_LIST;
26 class TO_BLOCK;
27 struct Pix;
28
29 namespace tesseract {
30
31 class ColPartitionGrid;
32 class ColPartitionSet;
33 class BLOBNBOX;
34
35 class TESS_API EquationDetectBase {
36 public:
37 EquationDetectBase() = default;
38 virtual ~EquationDetectBase();
39
40 // Iterate over the blobs inside to_block, and set the blobs that we want to
41 // process to BSTT_NONE. (By default, they should be BSTT_SKIP). The function
42 // returns 0 upon success.
43 virtual int LabelSpecialText(TO_BLOCK *to_block) = 0;
44
45 // Interface to find possible equation partition grid from part_grid. This
46 // should be called after IdentifySpecialText function.
47 virtual int FindEquationParts(ColPartitionGrid *part_grid, ColPartitionSet **best_columns) = 0;
48
49 // Debug function: Render a bounding box on pix based on the value of its
50 // special_text_type, specifically:
51 // BSTT_MATH: red box
52 // BSTT_DIGIT: cyan box
53 // BSTT_ITALIC: green box
54 // BSTT_UNCLEAR: blue box
55 // All others: yellow box
56 static void RenderSpecialText(Image pix, BLOBNBOX *blob);
57 };
58
59 } // namespace tesseract
60
61 #endif // TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_