Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/pithsync.h @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 /**********************************************************************
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2 * File: pithsync.h (Formerly pitsync2.h)
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3 * Description: Code to find the optimum fixed pitch segmentation of some blobs.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 1992, Hewlett-Packard Ltd.
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7 ** Licensed under the Apache License, Version 2.0 (the "License");
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8 ** you may not use this file except in compliance with the License.
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9 ** You may obtain a copy of the License at
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10 ** http://www.apache.org/licenses/LICENSE-2.0
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11 ** Unless required by applicable law or agreed to in writing, software
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12 ** distributed under the License is distributed on an "AS IS" BASIS,
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13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 ** See the License for the specific language governing permissions and
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15 ** limitations under the License.
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16 *
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17 **********************************************************************/
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18
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19 #ifndef PITHSYNC_H
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20 #define PITHSYNC_H
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21
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22 #include "blobbox.h"
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23 #include "params.h"
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24 #include "statistc.h"
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26 namespace tesseract {
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28 class FPSEGPT_LIST;
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30 class FPCUTPT {
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31 public:
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32 FPCUTPT() = default;
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33 void setup( // start of cut
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34 FPCUTPT cutpts[], // predecessors
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35 int16_t array_origin, // start coord
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36 STATS *projection, // occupation
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37 int16_t zero_count, // official zero
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38 int16_t pitch, // proposed pitch
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39 int16_t x, // position
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40 int16_t offset); // dist to gap
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41
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42 void assign( // evaluate cut
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43 FPCUTPT cutpts[], // predecessors
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44 int16_t array_origin, // start coord
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45 int16_t x, // position
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46 bool faking, // faking this one
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47 bool mid_cut, // doing free cut
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48 int16_t offset, // extra cost dist
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49 STATS *projection, // occupation
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50 float projection_scale, // scaling
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51 int16_t zero_count, // official zero
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52 int16_t pitch, // proposed pitch
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53 int16_t pitch_error); // allowed tolerance
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54
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55 void assign_cheap( // evaluate cut
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56 FPCUTPT cutpts[], // predecessors
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57 int16_t array_origin, // start coord
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58 int16_t x, // position
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59 bool faking, // faking this one
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60 bool mid_cut, // doing free cut
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61 int16_t offset, // extra cost dist
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62 STATS *projection, // occupation
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63 float projection_scale, // scaling
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64 int16_t zero_count, // official zero
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65 int16_t pitch, // proposed pitch
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66 int16_t pitch_error); // allowed tolerance
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67
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68 int32_t position() { // access func
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69 return xpos;
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70 }
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71 double cost_function() {
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72 return cost;
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73 }
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74 double squares() {
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75 return sq_sum;
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76 }
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77 double sum() {
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78 return mean_sum;
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79 }
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80 FPCUTPT *previous() {
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81 return pred;
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82 }
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83 int16_t cheap_cuts() const { // no of mi cuts
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84 return mid_cuts;
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85 }
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86 int16_t index() const {
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87 return region_index;
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88 }
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89
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90 bool faked; // faked split point
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91 bool terminal; // successful end
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92 int16_t fake_count; // total fakes to here
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93
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94 private:
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95 int16_t region_index; // cut serial number
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96 int16_t mid_cuts; // no of cheap cuts
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97 int32_t xpos; // location
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98 uint32_t back_balance; // proj backwards
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99 uint32_t fwd_balance; // proj forwards
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100 FPCUTPT *pred; // optimal previous
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101 double mean_sum; // mean so far
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102 double sq_sum; // summed distsances
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103 double cost; // cost function
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104 };
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105 double check_pitch_sync2( // find segmentation
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106 BLOBNBOX_IT *blob_it, // blobs to do
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107 int16_t blob_count, // no of blobs
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108 int16_t pitch, // pitch estimate
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109 int16_t pitch_error, // tolerance
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110 STATS *projection, // vertical
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111 int16_t projection_left, // edges //scale factor
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112 int16_t projection_right, float projection_scale,
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113 int16_t &occupation_count, // no of occupied cells
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114 FPSEGPT_LIST *seg_list, // output list
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115 int16_t start, // start of good range
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116 int16_t end // end of good range
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117 );
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118 double check_pitch_sync3( // find segmentation
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119 int16_t projection_left, // edges //to be considered 0
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120 int16_t projection_right, int16_t zero_count,
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121 int16_t pitch, // pitch estimate
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122 int16_t pitch_error, // tolerance
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123 STATS *projection, // vertical
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124 float projection_scale, // scale factor
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125 int16_t &occupation_count, // no of occupied cells
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126 FPSEGPT_LIST *seg_list, // output list
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127 int16_t start, // start of good range
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128 int16_t end // end of good range
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129 );
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130
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131 } // namespace tesseract
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132
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133 #endif