Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/linefind.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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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: linefind.h
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3 // Description: Class to find vertical lines in an image and create
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4 // a corresponding list of empty blobs.
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5 // Author: Ray Smith
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6 //
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7 // (C) Copyright 2008, 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_LINEFIND_H_
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21 #define TESSERACT_TEXTORD_LINEFIND_H_
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23 namespace tesseract {
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25 class TabVector_LIST;
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27 /**
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28 * The LineFinder class is a simple static function wrapper class that mainly
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29 * exposes the FindVerticalLines function.
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30 */
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31 class LineFinder {
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32 public:
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33 /**
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34 * Finds vertical and horizontal line objects in the given pix and removes
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35 * them.
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36 *
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37 * Uses the given resolution to determine size thresholds instead of any
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38 * that may be present in the pix.
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39 *
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40 * The output vertical_x and vertical_y contain a sum of the output vectors,
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41 * thereby giving the mean vertical direction.
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42 *
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43 * If pix_music_mask != nullptr, and music is detected, a mask of the staves
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44 * and anything that is connected (bars, notes etc.) will be returned in
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45 * pix_music_mask, the mask subtracted from pix, and the lines will not
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46 * appear in v_lines or h_lines.
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47 *
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48 * The output vectors are owned by the list and Frozen (cannot refit) by
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49 * having no boxes, as there is no need to refit or merge separator lines.
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50 *
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51 * The detected lines are removed from the pix.
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52 */
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53 static void FindAndRemoveLines(int resolution, bool debug, Image pix, int *vertical_x,
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54 int *vertical_y, Image *pix_music_mask, TabVector_LIST *v_lines,
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55 TabVector_LIST *h_lines);
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56 };
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58 } // namespace tesseract.
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59
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60 #endif // TESSERACT_TEXTORD_LINEFIND_H_