Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/wordrec/findseam.cpp @ 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 *
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3 * File: findseam.cpp (Formerly findseam.c)
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4 * Author: Mark Seaman, OCR Technology
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5 *
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6 * (c) Copyright 1987, Hewlett-Packard Company.
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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 I n c l u d e s
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20 ----------------------------------------------------------------------*/
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21 #include "findseam.h"
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22 #include "outlines.h"
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23 #include "plotedges.h"
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24 #include "seam.h"
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25 #include "wordrec.h"
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26
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27 // Include automatically generated configuration file if running autoconf.
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28 #ifdef HAVE_CONFIG_H
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29 # include "config_auto.h"
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30 #endif
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31
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32 /**********************************************************************
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33 * partial_split_priority
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34 *
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35 * Assign a priority to this split based on the features that it has.
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36 * Grade it according to the different rating schemes and return the
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37 * value of its goodness.
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38 **********************************************************************/
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39
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40 #define partial_split_priority(split) (grade_split_length(split) + grade_sharpness(split))
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41
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42 /*----------------------------------------------------------------------
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43 T y p e s
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44 ----------------------------------------------------------------------*/
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45 #define SPLIT_CLOSENESS 20 /* Difference in x value */
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46 /* How many to keep */
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47 #define MAX_NUM_SEAMS 150
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48 /* How many to keep */
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49 #define NO_FULL_PRIORITY (-1) // Special marker for pri.
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50 /* Evaluate right away */
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51 #define BAD_PRIORITY 9999.0
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52
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53 /*----------------------------------------------------------------------
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54 F u n c t i o n s
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55 ----------------------------------------------------------------------*/
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56 namespace tesseract {
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57
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58 /**********************************************************************
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59 * add_seam_to_queue
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60 *
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61 * Adds the given new_seam to the seams priority queue, unless it is full
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62 * and the new seam is worse than the worst.
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63 **********************************************************************/
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64 void Wordrec::add_seam_to_queue(float new_priority, SEAM *new_seam, SeamQueue *seams) {
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65 if (new_seam == nullptr) {
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66 return;
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67 }
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68 if (chop_debug) {
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69 tprintf("Pushing new seam with priority %g :", new_priority);
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70 new_seam->Print("seam: ");
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71 }
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72 if (seams->size() >= MAX_NUM_SEAMS) {
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73 SeamPair old_pair(0, nullptr);
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74 if (seams->PopWorst(&old_pair) && old_pair.key() <= new_priority) {
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75 if (chop_debug) {
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76 tprintf("Old seam staying with priority %g\n", old_pair.key());
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77 }
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78 delete new_seam;
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79 seams->Push(&old_pair);
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80 return;
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81 } else if (chop_debug) {
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82 tprintf("New seam with priority %g beats old worst seam with %g\n", new_priority,
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83 old_pair.key());
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84 }
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85 }
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86 SeamPair new_pair(new_priority, new_seam);
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87 seams->Push(&new_pair);
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88 }
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89
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90 /**********************************************************************
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91 * choose_best_seam
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92 *
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93 * Choose the best seam that can be created by assembling this a
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94 * collection of splits. A queue of all the possible seams is
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95 * maintained. Each new split received is placed in that queue with
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96 * its partial priority value. These values in the seam queue are
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97 * evaluated and combined until a good enough seam is found. If no
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98 * further good seams are being found then this function returns to the
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99 * caller, who will send more splits. If this function is called with
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 * a split of nullptr, then no further splits can be supplied by the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 * caller.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 **********************************************************************/
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
103 void Wordrec::choose_best_seam(SeamQueue *seam_queue, const SPLIT *split, PRIORITY priority,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 SEAM **seam_result, TBLOB *blob, SeamPile *seam_pile) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 SEAM *seam;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 float my_priority;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 /* Add seam of split */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 my_priority = priority;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 if (split != nullptr) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 TPOINT split_point = split->point1->pos;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 split_point += split->point2->pos;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 split_point /= 2;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
113 seam = new SEAM(my_priority, split_point, *split);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
114 if (chop_debug > 1) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 seam->Print("Partial priority ");
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
116 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
117 add_seam_to_queue(my_priority, seam, seam_queue);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
118
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parents:
diff changeset
119 if (my_priority > chop_good_split) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
120 return;
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parents:
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121 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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122 }
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parents:
diff changeset
123
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
124 TBOX bbox = blob->bounding_box();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
125 /* Queue loop */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
126 while (!seam_queue->empty()) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
127 SeamPair seam_pair;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
128 seam_queue->Pop(&seam_pair);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
129 seam = seam_pair.extract_data();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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130 /* Set full priority */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
131 my_priority =
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
132 seam->FullPriority(bbox.left(), bbox.right(), chop_overlap_knob, chop_centered_maxwidth,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
133 chop_center_knob, chop_width_change_knob);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
134 if (chop_debug) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135 char str[80];
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 snprintf(str, sizeof(str), "Full my_priority %0.0f, ", my_priority);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 seam->Print(str);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 }
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parents:
diff changeset
139
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
140 if ((*seam_result == nullptr || (*seam_result)->priority() > my_priority) &&
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
141 my_priority < chop_ok_split) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142 /* No crossing */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 if (seam->IsHealthy(*blob, chop_min_outline_points, chop_min_outline_area)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
144 delete *seam_result;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 *seam_result = new SEAM(*seam);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 (*seam_result)->set_priority(my_priority);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 } else {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 delete seam;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149 seam = nullptr;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 my_priority = BAD_PRIORITY;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
151 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154 if (my_priority < chop_good_split) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 delete seam;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 return; /* Made good answer */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 if (seam) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 /* Combine with others */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 if (seam_pile->size() < chop_seam_pile_size) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 combine_seam(*seam_pile, seam, seam_queue);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 SeamDecPair pair(seam_pair.key(), seam);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 seam_pile->Push(&pair);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 } else if (chop_new_seam_pile && seam_pile->size() == chop_seam_pile_size &&
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 seam_pile->PeekTop().key() > seam_pair.key()) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 combine_seam(*seam_pile, seam, seam_queue);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 SeamDecPair pair;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 seam_pile->Pop(&pair); // pop the worst.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 // Replace the seam in pair (deleting the old one) with
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 // the new seam and score, then push back into the heap.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 pair.set_key(seam_pair.key());
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 pair.set_data(seam);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 seam_pile->Push(&pair);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 } else {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 delete seam;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 my_priority = seam_queue->empty() ? NO_FULL_PRIORITY : seam_queue->PeekTop().key();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 if ((my_priority > chop_ok_split) || (my_priority > chop_good_split && split)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 return;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 /**********************************************************************
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 * combine_seam
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 * Find other seams to combine with this one. The new seams that result
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 * from this union should be added to the seam queue. The return value
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 * tells whether or not any additional seams were added to the queue.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 **********************************************************************/
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 void Wordrec::combine_seam(const SeamPile &seam_pile, const SEAM *seam, SeamQueue *seam_queue) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 for (int x = 0; x < seam_pile.size(); ++x) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
196 const SEAM *this_one = seam_pile.get(x).data();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
197 if (seam->CombineableWith(*this_one, SPLIT_CLOSENESS, chop_ok_split)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
198 SEAM *new_one = new SEAM(*seam);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
199 new_one->CombineWith(*this_one);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200 if (chop_debug > 1) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
201 new_one->Print("Combo priority ");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
202 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
203 add_seam_to_queue(new_one->priority(), new_one, seam_queue);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
204 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
205 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
206 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
207
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
208 /**********************************************************************
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
209 * pick_good_seam
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
210 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
211 * Find and return a good seam that will split this blob into two pieces.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
212 * Work from the outlines provided.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
213 **********************************************************************/
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
214 SEAM *Wordrec::pick_good_seam(TBLOB *blob) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
215 SeamPile seam_pile(chop_seam_pile_size);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
216 EDGEPT *points[MAX_NUM_POINTS];
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
217 EDGEPT_CLIST new_points;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
218 SEAM *seam = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
219 TESSLINE *outline;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
220 int16_t num_points = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
221
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
222 #ifndef GRAPHICS_DISABLED
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
223 if (chop_debug > 2) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
224 wordrec_display_splits.set_value(true);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
225 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
226
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
227 draw_blob_edges(blob);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
228 #endif
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
229
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
230 PointHeap point_heap(MAX_NUM_POINTS);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
231 for (outline = blob->outlines; outline; outline = outline->next) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
232 prioritize_points(outline, &point_heap);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
233 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
234
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
235 while (!point_heap.empty() && num_points < MAX_NUM_POINTS) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
236 points[num_points++] = point_heap.PeekTop().data();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
237 point_heap.Pop(nullptr);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
238 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
239
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
240 /* Initialize queue */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
241 SeamQueue seam_queue(MAX_NUM_SEAMS);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
242
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
243 try_point_pairs(points, num_points, &seam_queue, &seam_pile, &seam, blob);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
244 try_vertical_splits(points, num_points, &new_points, &seam_queue, &seam_pile, &seam, blob);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
245
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
246 if (seam == nullptr) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
247 choose_best_seam(&seam_queue, nullptr, BAD_PRIORITY, &seam, blob, &seam_pile);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
248 } else if (seam->priority() > chop_good_split) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
249 choose_best_seam(&seam_queue, nullptr, seam->priority(), &seam, blob, &seam_pile);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
250 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
251
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
252 EDGEPT_C_IT it(&new_points);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
253 for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
254 EDGEPT *inserted_point = it.data();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 if (seam == nullptr || !seam->UsesPoint(inserted_point)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
256 for (outline = blob->outlines; outline; outline = outline->next) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
257 if (outline->loop == inserted_point) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
258 outline->loop = outline->loop->next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
259 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
260 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 remove_edgept(inserted_point);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
262 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
263 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265 if (seam) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 if (seam->priority() > chop_ok_split) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
267 delete seam;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
268 seam = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
269 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
270 #ifndef GRAPHICS_DISABLED
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
271 else if (wordrec_display_splits) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
272 seam->Mark(edge_window);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
273 if (chop_debug > 2) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
274 edge_window->Update();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
275 edge_window->Wait();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
276 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
277 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
278 #endif
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
279 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
280
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 if (chop_debug) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 wordrec_display_splits.set_value(false);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
285 return (seam);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
286 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
287
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
288 /**********************************************************************
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 * try_point_pairs
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
290 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
291 * Try all the splits that are produced by pairing critical points
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292 * together. See if any of them are suitable for use. Use a seam
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
293 * queue and seam pile that have already been initialized and used.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
294 **********************************************************************/
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
295 void Wordrec::try_point_pairs(EDGEPT *points[MAX_NUM_POINTS], int16_t num_points,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
296 SeamQueue *seam_queue, SeamPile *seam_pile, SEAM **seam,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
297 TBLOB *blob) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
298 int16_t x;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
299 int16_t y;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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300 PRIORITY priority;
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301
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302 for (x = 0; x < num_points; x++) {
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303 for (y = x + 1; y < num_points; y++) {
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304 if (points[y] &&
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305 points[x]->WeightedDistance(*points[y], chop_x_y_weight) < chop_split_length &&
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306 points[x] != points[y]->next && points[y] != points[x]->next &&
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307 !is_exterior_point(points[x], points[y]) && !is_exterior_point(points[y], points[x])) {
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308 SPLIT split(points[x], points[y]);
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309 priority = partial_split_priority(&split);
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310
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311 choose_best_seam(seam_queue, &split, priority, seam, blob, seam_pile);
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312 }
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313 }
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314 }
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315 }
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316
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317 /**********************************************************************
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318 * try_vertical_splits
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319 *
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320 * Try all the splits that are produced by vertical projection to see
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321 * if any of them are suitable for use. Use a seam queue and seam pile
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322 * that have already been initialized and used.
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323 * Return in new_points a collection of points that were inserted into
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324 * the blob while examining vertical splits and which may safely be
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325 * removed once a seam is chosen if they are not part of the seam.
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326 **********************************************************************/
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327 void Wordrec::try_vertical_splits(EDGEPT *points[MAX_NUM_POINTS], int16_t num_points,
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328 EDGEPT_CLIST *new_points, SeamQueue *seam_queue,
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329 SeamPile *seam_pile, SEAM **seam, TBLOB *blob) {
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330 EDGEPT *vertical_point = nullptr;
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331 int16_t x;
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332 PRIORITY priority;
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333 TESSLINE *outline;
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334
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335 for (x = 0; x < num_points; x++) {
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336 vertical_point = nullptr;
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337 for (outline = blob->outlines; outline; outline = outline->next) {
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338 vertical_projection_point(points[x], outline->loop, &vertical_point, new_points);
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339 }
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340
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341 if (vertical_point && points[x] != vertical_point->next && vertical_point != points[x]->next &&
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342 points[x]->WeightedDistance(*vertical_point, chop_x_y_weight) < chop_split_length) {
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343 SPLIT split(points[x], vertical_point);
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344 priority = partial_split_priority(&split);
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345 choose_best_seam(seam_queue, &split, priority, seam, blob, seam_pile);
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346 }
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347 }
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348 }
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349
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350 } // namespace tesseract