Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/ocrblock.h @ 46:7ee69f120f19 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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1 /**********************************************************************
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2 * File: ocrblock.h (Formerly block.h)
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3 * Description: Page block class definition.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 1991, 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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19 #ifndef OCRBLOCK_H
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20 #define OCRBLOCK_H
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22 #include "ocrpara.h"
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23 #include "ocrrow.h"
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24 #include "pdblock.h"
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26 namespace tesseract {
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28 class BLOCK; // forward decl
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30 ELISTIZEH(BLOCK)
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32 class TESS_API BLOCK : public ELIST_LINK
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33 // page block
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34 {
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35 friend class BLOCK_RECT_IT; // block iterator
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36 public:
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37 BLOCK() : re_rotation_(1.0f, 0.0f), classify_rotation_(1.0f, 0.0f), skew_(1.0f, 0.0f) {}
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38 BLOCK(const char *name, ///< filename
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39 bool prop, ///< proportional
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40 int16_t kern, ///< kerning
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41 int16_t space, ///< spacing
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42 TDimension xmin, ///< bottom left
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43 TDimension ymin,
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44 TDimension xmax, ///< top right
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45 TDimension ymax);
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46
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47 ~BLOCK() = default;
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48
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49 /**
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50 * set space size etc.
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51 * @param prop proportional
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52 * @param kern inter char size
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53 * @param space inter word size
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54 * @param ch_pitch pitch if fixed
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55 */
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56 void set_stats(bool prop, int16_t kern, int16_t space, int16_t ch_pitch) {
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57 proportional = prop;
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58 kerning = static_cast<int8_t>(kern);
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59 spacing = space;
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60 pitch = ch_pitch;
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61 }
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62 /// set char size
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63 void set_xheight(int32_t height) {
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64 xheight = height;
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65 }
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66 /// set font class
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67 void set_font_class(int16_t font) {
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68 font_class = font;
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69 }
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70 /// return proportional
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71 bool prop() const {
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72 return proportional;
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73 }
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74 bool right_to_left() const {
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75 return right_to_left_;
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76 }
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77 void set_right_to_left(bool value) {
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78 right_to_left_ = value;
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79 }
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80 /// return pitch
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81 int32_t fixed_pitch() const {
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82 return pitch;
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83 }
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84 /// return kerning
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85 int16_t kern() const {
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86 return kerning;
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87 }
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88 /// return font class
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89 int16_t font() const {
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90 return font_class;
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91 }
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92 /// return spacing
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93 int16_t space() const {
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94 return spacing;
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95 }
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96 /// return filename
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97 const char *name() const {
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98 return filename.c_str();
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99 }
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100 /// return xheight
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101 int32_t x_height() const {
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102 return xheight;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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103 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 float cell_over_xheight() 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
105 return cell_over_xheight_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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106 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 void set_cell_over_xheight(float ratio) {
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
108 cell_over_xheight_ = ratio;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 /// get rows
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
111 ROW_LIST *row_list() {
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
112 return &rows;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
113 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
114 // Compute the margins between the edges of each row and this block's
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 // polyblock, and store the results in the rows.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
116 void compute_row_margins();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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117
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
118 // get paragraphs
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
119 PARA_LIST *para_list() {
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
120 return &paras_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
121 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 /// get blobs
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
123 C_BLOB_LIST *blob_list() {
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
124 return &c_blobs;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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125 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
126 C_BLOB_LIST *reject_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
127 return &rej_blobs;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
128 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
129 FCOORD re_rotation() 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
130 return re_rotation_; // How to transform coords back to image.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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131 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
132 void set_re_rotation(const FCOORD &rotation) {
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
133 re_rotation_ = rotation;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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134 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135 FCOORD classify_rotation() 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
136 return classify_rotation_; // Apply this before classifying.
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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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 void set_classify_rotation(const FCOORD &rotation) {
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
139 classify_rotation_ = rotation;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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140 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
141 FCOORD skew() 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
142 return skew_; // Direction of true horizontal.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
144 void set_skew(const FCOORD &skew) {
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
145 skew_ = skew;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 const ICOORD &median_size() 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
148 return median_size_;
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parents:
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149 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 void set_median_size(int x, int y) {
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
151 median_size_.set_x(x);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 median_size_.set_y(y);
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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
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 Image render_mask(TBOX *mask_box) {
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 pdblk.render_mask(re_rotation_, mask_box);
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 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158
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 // Returns the bounding box including the desired combination of upper and
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 // lower noise/diacritic elements.
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 TBOX restricted_bounding_box(bool upper_dots, bool lower_dots) 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
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 // Reflects the polygon in the y-axis and recomputes the bounding_box.
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 // Does nothing to any contained rows/words/blobs etc.
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 void reflect_polygon_in_y_axis();
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
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 void rotate(const FCOORD &rotation);
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
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 /// decreasing y order
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 void sort_rows();
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
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
172 /// shrink white space
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 void compress();
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
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 /// check proportional
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 check_pitch();
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
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
178 /// shrink white space and move by 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
179 void compress(const ICOORD vec);
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
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 /// dump whole table
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 void print(FILE *fp, bool dump);
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
183
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
184 BLOCK &operator=(const BLOCK &source);
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 PDBLK pdblk; ///< Page Description Block
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186
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 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
188 bool proportional = false; ///< proportional
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 bool right_to_left_ = false; ///< major script is right to left.
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
190 int8_t kerning = 0; ///< inter blob gap
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 int16_t spacing = 0; ///< inter word gap
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 int16_t pitch = 0; ///< pitch of non-props
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 int16_t font_class = 0; ///< correct font class
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 int32_t xheight = 0; ///< height of chars
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 float cell_over_xheight_ = 0.0f; ///< Ratio of cell height to xheight.
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 std::string filename; ///< name of block
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 ROW_LIST rows; ///< rows in block
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 PARA_LIST paras_; ///< paragraphs of block
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 C_BLOB_LIST c_blobs; ///< before textord
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 C_BLOB_LIST rej_blobs; ///< duff stuff
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 FCOORD re_rotation_; ///< How to transform coords back to image.
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 FCOORD classify_rotation_; ///< Apply this before classifying.
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 FCOORD skew_; ///< Direction of true horizontal.
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 ICOORD median_size_; ///< Median size of blobs.
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205 };
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206
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207 // A function to print segmentation stats for the given block list.
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208 void PrintSegmentationStats(BLOCK_LIST *block_list);
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209
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210 // Extracts blobs fromo the given block list and adds them to the output list.
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211 // The block list must have been created by performing a page segmentation.
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212 void ExtractBlobsFromSegmentation(BLOCK_LIST *blocks, C_BLOB_LIST *output_blob_list);
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213
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214 // Refreshes the words in the block_list by using blobs in the
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215 // new_blobs list.
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216 // Block list must have word segmentation in it.
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217 // It consumes the blobs provided in the new_blobs list. The blobs leftover in
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218 // the new_blobs list after the call weren't matched to any blobs of the words
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219 // in block list.
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220 // The output not_found_blobs is a list of blobs from the original segmentation
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221 // in the block_list for which no corresponding new blobs were found.
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222 void RefreshWordBlobsFromNewBlobs(BLOCK_LIST *block_list, C_BLOB_LIST *new_blobs,
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223 C_BLOB_LIST *not_found_blobs);
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224
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225 } // namespace tesseract
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226
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227 #endif