Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/pitsync1.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: pitsync1.h (Formerly pitsync.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 * Created: Thu Nov 19 11:48:05 GMT 1992
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6 *
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7 * (C) Copyright 1992, Hewlett-Packard Ltd.
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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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19
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20 #ifndef PITSYNC1_H
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21 #define PITSYNC1_H
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22
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23 #include "blobbox.h"
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24 #include "clst.h"
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25 #include "elst.h"
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26 #include "params.h"
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27 #include "pithsync.h"
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28 #include "statistc.h"
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30 namespace tesseract {
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32 class FPSEGPT_LIST;
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33
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34 class FPSEGPT : public ELIST_LINK {
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35 public:
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36 FPSEGPT() = default;
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37 FPSEGPT( // constructor
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38 int16_t x); // position
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39 FPSEGPT( // constructor
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40 int16_t x, // position
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41 bool faking, // faking this one
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42 int16_t offset, // extra cost dist
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43 int16_t region_index, // segment number
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44 int16_t pitch, // proposed pitch
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45 int16_t pitch_error, // allowed tolerance
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46 FPSEGPT_LIST *prev_list); // previous segment
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47 FPSEGPT(FPCUTPT *cutpt); // build from new type
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48
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49 int32_t position() { // access func
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50 return xpos;
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51 }
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52 double cost_function() {
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53 return cost;
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54 }
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55 double squares() {
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56 return sq_sum;
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57 }
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58 double sum() {
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59 return mean_sum;
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60 }
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61 FPSEGPT *previous() {
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62 return pred;
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63 }
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64 int16_t cheap_cuts() const { // no of cheap cuts
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65 return mid_cuts;
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66 }
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67
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68 bool faked; // faked split point
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69 bool terminal; // successful end
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70 int16_t fake_count; // total fakes to here
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71
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72 private:
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73 int16_t mid_cuts; // no of cheap cuts
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74 int32_t xpos; // location
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75 FPSEGPT *pred; // optimal previous
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76 double mean_sum; // mean so far
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77 double sq_sum; // summed distsances
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78 double cost; // cost function
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79 };
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80
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81 ELISTIZEH(FPSEGPT)
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82 CLISTIZEH(FPSEGPT_LIST)
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83 extern INT_VAR_H(pitsync_linear_version);
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84 extern double_VAR_H(pitsync_joined_edge);
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85 extern double_VAR_H(pitsync_offset_freecut_fraction);
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86 double check_pitch_sync( // find segmentation
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87 BLOBNBOX_IT *blob_it, // blobs to do
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88 int16_t blob_count, // no of blobs
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89 int16_t pitch, // pitch estimate
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90 int16_t pitch_error, // tolerance
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91 STATS *projection, // vertical
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92 FPSEGPT_LIST *seg_list // output list
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93 );
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94 void make_illegal_segment( // find segmentation
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95 FPSEGPT_LIST *prev_list, // previous segments
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96 TBOX blob_box, // bounding box
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97 BLOBNBOX_IT blob_it, // iterator
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98 int16_t region_index, // number of segment
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99 int16_t pitch, // pitch estimate
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100 int16_t pitch_error, // tolerance
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101 FPSEGPT_LIST *seg_list // output list
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102 );
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103 int16_t vertical_torow_projection( // project whole row
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104 TO_ROW *row, // row to do
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105 STATS *projection // output
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106 );
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107 void vertical_cblob_projection( // project outlines
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108 C_BLOB *blob, // blob to project
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109 STATS *stats // output
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110 );
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111 void vertical_coutline_projection( // project outlines
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112 C_OUTLINE *outline, // outline to project
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113 STATS *stats // output
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114 );
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115
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116 } // namespace tesseract
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117
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118 #endif