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annotate mupdf-source/thirdparty/tesseract/src/textord/equationdetectbase.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: equationdetectbase.h
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3 // Description: The base class equation detection class.
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4 // Author: Zongyi (Joe) Liu (joeliu@google.com)
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5 // Created: Fri Aug 31 11:13:01 PST 2011
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6 //
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7 // (C) Copyright 2011, Google Inc.
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8 // Licensed under the Apache License, Version 2.0 (the "License");
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9 // you may not use this file except in compliance with the License.
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10 // You may obtain a copy of the License at
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11 // http://www.apache.org/licenses/LICENSE-2.0
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12 // Unless required by applicable law or agreed to in writing, software
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13 // distributed under the License is distributed on an "AS IS" BASIS,
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14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 // See the License for the specific language governing permissions and
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16 // limitations under the License.
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17 //
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18 ///////////////////////////////////////////////////////////////////////
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20 #ifndef TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
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21 #define TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
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23 #include "image.h"
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25 class BLOBNBOX_LIST;
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26 class TO_BLOCK;
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27 struct Pix;
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29 namespace tesseract {
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31 class ColPartitionGrid;
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32 class ColPartitionSet;
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33 class BLOBNBOX;
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35 class TESS_API EquationDetectBase {
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36 public:
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37 EquationDetectBase() = default;
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38 virtual ~EquationDetectBase();
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40 // Iterate over the blobs inside to_block, and set the blobs that we want to
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41 // process to BSTT_NONE. (By default, they should be BSTT_SKIP). The function
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42 // returns 0 upon success.
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43 virtual int LabelSpecialText(TO_BLOCK *to_block) = 0;
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45 // Interface to find possible equation partition grid from part_grid. This
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46 // should be called after IdentifySpecialText function.
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47 virtual int FindEquationParts(ColPartitionGrid *part_grid, ColPartitionSet **best_columns) = 0;
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49 // Debug function: Render a bounding box on pix based on the value of its
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50 // special_text_type, specifically:
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51 // BSTT_MATH: red box
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52 // BSTT_DIGIT: cyan box
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53 // BSTT_ITALIC: green box
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54 // BSTT_UNCLEAR: blue box
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55 // All others: yellow box
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56 static void RenderSpecialText(Image pix, BLOBNBOX *blob);
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57 };
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59 } // namespace tesseract
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61 #endif // TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_