Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/seam.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 *
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3 * File: seam.h
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4 * Author: Mark Seaman, SW Productivity
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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 #ifndef SEAM_H
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19 #define SEAM_H
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20
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21 // Include automatically generated configuration file if running autoconf.
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22 #ifdef HAVE_CONFIG_H
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23 # include "config_auto.h"
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24 #endif
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26 #include "blobs.h"
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27 #include "split.h"
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29 namespace tesseract {
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31 using PRIORITY = float; /* PRIORITY */
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33 class SEAM {
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34 public:
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35 // A seam with no splits
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36 SEAM(float priority, const TPOINT &location)
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37 : priority_(priority), location_(location), num_splits_(0) {}
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38 // A seam with a single split point.
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39 SEAM(float priority, const TPOINT &location, const SPLIT &split)
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40 : priority_(priority), location_(location), num_splits_(1) {
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41 splits_[0] = split;
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42 }
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43 // Default copy constructor, operator= and destructor are OK!
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44
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45 // Accessors.
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46 float priority() const {
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47 return priority_;
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48 }
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49 void set_priority(float priority) {
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50 priority_ = priority;
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51 }
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52 bool HasAnySplits() const {
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53 return num_splits_ > 0;
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54 }
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55
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56 // Returns the bounding box of all the points in the seam.
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57 TBOX bounding_box() const;
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58
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59 // Returns true if other can be combined into *this.
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60 bool CombineableWith(const SEAM &other, int max_x_dist, float max_total_priority) const {
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61 int dist = location_.x - other.location_.x;
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62 return -max_x_dist < dist && dist < max_x_dist &&
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63 num_splits_ + other.num_splits_ <= kMaxNumSplits &&
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64 priority_ + other.priority_ < max_total_priority && !OverlappingSplits(other) &&
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65 !SharesPosition(other);
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66 }
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67
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68 // Combines other into *this. Only works if CombinableWith returned true.
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69 void CombineWith(const SEAM &other) {
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70 priority_ += other.priority_;
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71 location_ += other.location_;
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72 location_ /= 2;
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73
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74 for (uint8_t s = 0; s < other.num_splits_ && num_splits_ < kMaxNumSplits; ++s) {
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75 splits_[num_splits_++] = other.splits_[s];
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76 }
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77 }
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78
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79 // Returns true if the given blob contains all splits of *this SEAM.
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80 bool ContainedByBlob(const TBLOB &blob) const {
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81 for (int s = 0; s < num_splits_; ++s) {
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82 if (!splits_[s].ContainedByBlob(blob)) {
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83 return false;
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84 }
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85 }
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86 return true;
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87 }
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88
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89 // Returns true if the given EDGEPT is used by this SEAM, checking only
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90 // the EDGEPT pointer, not the coordinates.
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91 bool UsesPoint(const EDGEPT *point) const {
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92 for (int s = 0; s < num_splits_; ++s) {
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93 if (splits_[s].UsesPoint(point)) {
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94 return true;
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95 }
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96 }
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97 return false;
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98 }
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99 // Returns true if *this and other share any common point, by coordinates.
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100 bool SharesPosition(const SEAM &other) const {
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parents:
diff changeset
101 for (int s = 0; s < num_splits_; ++s) {
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parents:
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102 for (int t = 0; t < other.num_splits_; ++t) {
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parents:
diff changeset
103 if (splits_[s].SharesPosition(other.splits_[t])) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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104 return true;
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parents:
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105 }
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106 }
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107 }
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108 return false;
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109 }
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110 // Returns true if *this and other have any vertically overlapping splits.
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parents:
diff changeset
111 bool OverlappingSplits(const SEAM &other) const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
112 for (int s = 0; s < num_splits_; ++s) {
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113 TBOX split1_box = splits_[s].bounding_box();
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parents:
diff changeset
114 for (int t = 0; t < other.num_splits_; ++t) {
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115 TBOX split2_box = other.splits_[t].bounding_box();
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diff changeset
116 if (split1_box.y_overlap(split2_box)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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117 return true;
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118 }
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119 }
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120 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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121 return false;
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122 }
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parents:
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123
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124 // Marks the edgepts used by the seam so the segments made by the cut
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parents:
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125 // never get split further by another seam in the future.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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126 void Finalize() {
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parents:
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127 for (int s = 0; s < num_splits_; ++s) {
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parents:
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128 splits_[s].point1->MarkChop();
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129 splits_[s].point2->MarkChop();
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parents:
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130 }
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131 }
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132
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133 // Returns true if the splits in *this SEAM appear OK in the sense that they
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parents:
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134 // do not cross any outlines and do not chop off any ridiculously small
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parents:
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135 // pieces.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 bool IsHealthy(const TBLOB &blob, int min_points, int min_area) const;
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:
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137
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parents:
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138 // Computes the widthp_/widthn_ range for all existing SEAMs and for *this
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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139 // seam, which is about to be inserted at insert_index. Returns false if
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:
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140 // any of the computations fails, as this indicates an invalid chop.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 // widthn_/widthp_ are only changed if modify is true.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142 bool PrepareToInsertSeam(const std::vector<SEAM *> &seams, const std::vector<TBLOB *> &blobs,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 int insert_index, bool modify);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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144 // Computes the widthp_/widthn_ range. Returns false if not all the splits
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parents:
diff changeset
145 // are accounted for. widthn_/widthp_ are only changed if modify is true.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 bool FindBlobWidth(const std::vector<TBLOB *> &blobs, int index, bool modify);
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parents:
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147
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parents:
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148 // Splits this blob into two blobs by applying the splits included in
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149 // *this SEAM
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 void ApplySeam(bool italic_blob, TBLOB *blob, TBLOB *other_blob) const;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
151 // Undoes ApplySeam by removing the seam between these two blobs.
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:
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152 // Produces one blob as a result, and deletes other_blob.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 void UndoSeam(TBLOB *blob, TBLOB *other_blob) const;
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diff changeset
154
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parents:
diff changeset
155 // Prints everything in *this SEAM.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 void Print(const char *label) const;
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
157 // Prints a collection of 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
158 static void PrintSeams(const char *label, const std::vector<SEAM *> &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
159 #ifndef GRAPHICS_DISABLED
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parents:
diff changeset
160 // Draws the seam in the given window.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 void Mark(ScrollView *window) const;
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 #endif
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diff changeset
163
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 // Break up the blobs in this chain so that they are all independent.
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 // This operation should undo the affect of join_pieces.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 static void BreakPieces(const std::vector<SEAM *> &seams, const std::vector<TBLOB *> &blobs,
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 int first, int last);
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 // Join a group of base level pieces into a single blob that can then
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 // be classified.
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 static void JoinPieces(const std::vector<SEAM *> &seams, const std::vector<TBLOB *> &blobs,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 int first, int last);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
172
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parents:
diff changeset
173 // Hides the seam so the outlines appear not to be cut by it.
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 void Hide() const;
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
175 // Undoes hide, so the outlines are cut by the 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
176 void Reveal() const;
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
177
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parents:
diff changeset
178 // Computes and returns, but does not set, the full priority of *this 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
179 // The arguments here are config parameters defined in Wordrec. Add chop_
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
180 // to the beginning of the name.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 float FullPriority(int xmin, int xmax, double overlap_knob, int centered_maxwidth,
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 double center_knob, double width_change_knob) const;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
183
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 private:
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 // Maximum number of splits that a SEAM can hold.
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 static const uint8_t kMaxNumSplits = 3;
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
187 // Priority of this split. Lower is better.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 float 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
189 // Position of the middle of the seam.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 TPOINT location_;
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 // A range such that all splits in *this SEAM are contained within blobs in
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 // the range [index - widthn_,index + widthp_] where index is the index of
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 // this SEAM in the seams vector.
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 uint8_t widthp_ = 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
195 uint8_t widthn_ = 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
196 // Number of splits_ that are 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
197 uint8_t num_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:
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198 // Set of pairs of points that are the ends of each split in the SEAM.
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199 SPLIT splits_[kMaxNumSplits];
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200 };
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201
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202 void start_seam_list(TWERD *word, std::vector<SEAM *> *seam_array);
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203
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204 } // namespace tesseract
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205
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206 #endif