Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/wordrec/outlines.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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /******************************************************************************
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2 *
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3 * File: outlines.h
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4 * Description: Combinatorial Splitter
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5 * Author: Mark Seaman, OCR Technology
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6 *
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7 * (c) Copyright 1989, Hewlett-Packard Company.
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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 OUTLINES_H
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21 #define OUTLINES_H
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23 #include <cmath> // for abs
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24 #include "blobs.h" // for TPOINT
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25 #include "params.h" // for IntParam
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26 #include "wordrec.h" // for Wordrec
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28 /*----------------------------------------------------------------------
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29 C o n s t a n t s
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30 ----------------------------------------------------------------------*/
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31 #define LARGE_DISTANCE 100000 /* Used for closest dist */
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32 #define MIN_BLOB_SIZE 10 /* Big units */
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33 #define MAX_ASPECT_RATIO 2.5 /* Widest character */
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35 /*----------------------------------------------------------------------
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36 M a c r o s
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37 ----------------------------------------------------------------------*/
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38 /**********************************************************************
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39 * same_point
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40 *
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41 * Return true if the point values are the same. The parameters must
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42 * be of type POINT.
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43 **********************************************************************/
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44 #define same_point(p1, p2) \
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45 ((abs(p1.x - p2.x) < chop_same_distance) && (abs(p1.y - p2.y) < chop_same_distance))
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47 /**********************************************************************
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48 * dist_square
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49 *
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50 * Return the square of the distance between these two points. The
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51 * parameters must be of type POINT.
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52 **********************************************************************/
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54 #define dist_square(p1, p2) ((p2.x - p1.x) * (p2.x - p1.x) + (p2.y - p1.y) * (p2.y - p1.y))
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56 /**********************************************************************
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57 * closest
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58 *
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59 * The expression provides the EDGEPT that is closest to the point in
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60 * question. All three parameters must be of type EDGEPT.
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61 **********************************************************************/
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63 #define closest(test_p, p1, p2) \
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64 (p1 ? (p2 ? ((dist_square(test_p->pos, p1->pos) < dist_square(test_p->pos, p2->pos)) ? p1 : p2) \
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65 : p1) \
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66 : p2)
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68 /**********************************************************************
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69 * edgept_dist
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70 *
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71 * Return the distance (squared) between the two edge points.
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72 **********************************************************************/
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74 #define edgept_dist(p1, p2) (dist_square((p1)->pos, (p2)->pos))
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75
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76 /**********************************************************************
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77 * is_exterior_point
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78 *
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79 * Return true if the point supplied is an exterior projection from the
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80 * outline.
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81 **********************************************************************/
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83 #define is_exterior_point(edge, point) \
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84 (same_point(edge->prev->pos, point->pos) || same_point(edge->next->pos, point->pos) || \
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85 (angle_change(edge->prev, edge, edge->next) - angle_change(edge->prev, edge, point) > 20))
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87 /**********************************************************************
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88 * is_equal
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89 *
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90 * Return true if the POINTs are equal.
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91 **********************************************************************/
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93 #define is_equal(p1, p2) (((p1).x == (p2).x) && ((p1).y == (p2).y))
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95 /**********************************************************************
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96 * is_on_line
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97 *
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98 * Return true if the point is on the line segment between the two end
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99 * points. The two end points are included as part of the line. The
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100 * parameters must be of type POINT.
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101 **********************************************************************/
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102
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103 #define is_on_line(p, p0, p1) \
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104 (within_range((p).x, (p0).x, (p1).x) && within_range((p).y, (p0).y, (p1).y))
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105
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106 /**********************************************************************
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107 * within_range
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108 *
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109 * Return true if the first number is in between the second two numbers.
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110 * Return false otherwise.
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111 **********************************************************************/
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112
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113 #define within_range(x, x0, x1) (((x0 <= x) && (x <= x1)) || ((x1 <= x) && (x <= x0)))
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114
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115 #endif