Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/topitch.h @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 /**********************************************************************
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2 * File: topitch.h (Formerly to_pitch.h)
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3 * Description: Code to determine fixed pitchness and the pitch if fixed.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 1993, 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 TOPITCH_H
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20 #define TOPITCH_H
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21
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22 #include "blobbox.h"
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24 namespace tesseract {
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26 class Tesseract;
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28 extern BOOL_VAR_H(textord_debug_pitch_test);
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29 extern BOOL_VAR_H(textord_debug_pitch_metric);
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30 extern BOOL_VAR_H(textord_show_row_cuts);
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31 extern BOOL_VAR_H(textord_show_page_cuts);
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32 extern BOOL_VAR_H(textord_blockndoc_fixed);
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33 extern BOOL_VAR_H(textord_fast_pitch_test);
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34 extern double_VAR_H(textord_projection_scale);
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35 extern double_VAR_H(textord_balance_factor);
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37 void compute_fixed_pitch(ICOORD page_tr, // top right
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38 TO_BLOCK_LIST *port_blocks, // input list
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39 float gradient, // page skew
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40 FCOORD rotation, // for drawing
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41 bool testing_on); // correct orientation
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42 void fix_row_pitch( // get some value
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43 TO_ROW *bad_row, // row to fix
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44 TO_BLOCK *bad_block, // block of bad_row
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45 TO_BLOCK_LIST *blocks, // blocks to scan
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46 int32_t row_target, // number of row
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47 int32_t block_target // number of block
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48 );
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49 void compute_block_pitch(TO_BLOCK *block, // input list
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50 FCOORD rotation, // for drawing
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51 int32_t block_index, // block number
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52 bool testing_on); // correct orientation
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53 bool compute_rows_pitch( // find line stats
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54 TO_BLOCK *block, // block to do
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55 int32_t block_index, // block number
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56 bool testing_on // correct orientation
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57 );
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58 bool try_doc_fixed( // determine pitch
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59 ICOORD page_tr, // top right
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60 TO_BLOCK_LIST *port_blocks, // input list
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61 float gradient // page skew
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62 );
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63 bool try_block_fixed( // find line stats
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64 TO_BLOCK *block, // block to do
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65 int32_t block_index // block number
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66 );
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67 bool try_rows_fixed( // find line stats
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68 TO_BLOCK *block, // block to do
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69 int32_t block_index, // block number
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70 bool testing_on // correct orientation
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71 );
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72 void print_block_counts( // find line stats
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73 TO_BLOCK *block, // block to do
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74 int32_t block_index // block number
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75 );
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76 void count_block_votes( // find line stats
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77 TO_BLOCK *block, // block to do
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78 int32_t &def_fixed, // add to counts
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79 int32_t &def_prop, int32_t &maybe_fixed, int32_t &maybe_prop, int32_t &corr_fixed,
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80 int32_t &corr_prop, int32_t &dunno);
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81 bool row_pitch_stats( // find line stats
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82 TO_ROW *row, // current row
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83 int32_t maxwidth, // of spaces
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84 bool testing_on // correct orientation
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85 );
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86 bool find_row_pitch( // find lines
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87 TO_ROW *row, // row to do
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88 int32_t maxwidth, // max permitted space
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89 int32_t dm_gap, // ignorable gaps
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90 TO_BLOCK *block, // block of row
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91 int32_t block_index, // block_number
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92 int32_t row_index, // number of row
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93 bool testing_on // correct orientation
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94 );
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95 bool fixed_pitch_row( // find lines
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96 TO_ROW *row, // row to do
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97 BLOCK *block,
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98 int32_t block_index // block_number
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
99 );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 bool count_pitch_stats( // find lines
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 TO_ROW *row, // row to do
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 STATS *gap_stats, // blob gaps
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
103 STATS *pitch_stats, // centre-centre stats
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parents:
diff changeset
104 float initial_pitch, // guess at pitch
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 float min_space, // estimate space 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
106 bool ignore_outsize, // discard big objects
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 bool split_outsize, // split big objects
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parents:
diff changeset
108 int32_t dm_gap // ignorable gaps
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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109 );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 float tune_row_pitch( // find fp cells
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 TO_ROW *row, // row to do
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 STATS *projection, // vertical projection
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
113 int16_t projection_left, // edge of projection
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
114 int16_t projection_right, // edge of projection
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 float space_size, // size of blank
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
116 float &initial_pitch, // guess at pitch
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
117 float &best_sp_sd, // space sd
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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118 int16_t &best_mid_cuts, // no of cheap cuts
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
119 ICOORDELT_LIST *best_cells, // row cells
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parents:
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120 bool testing_on // individual words
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121 );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 float tune_row_pitch2( // find fp cells
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parents:
diff changeset
123 TO_ROW *row, // row to do
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parents:
diff changeset
124 STATS *projection, // vertical projection
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parents:
diff changeset
125 int16_t projection_left, // edge of projection
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parents:
diff changeset
126 int16_t projection_right, // edge of projection
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
127 float space_size, // size of blank
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
128 float &initial_pitch, // guess at 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
129 float &best_sp_sd, // space sd
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parents:
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130 int16_t &best_mid_cuts, // no of cheap cuts
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parents:
diff changeset
131 ICOORDELT_LIST *best_cells, // row cells
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parents:
diff changeset
132 bool testing_on // individual words
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diff changeset
133 );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
134 float compute_pitch_sd( // find fp cells
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parents:
diff changeset
135 TO_ROW *row, // row to do
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 STATS *projection, // vertical projection
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 int16_t projection_left, // edge
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
138 int16_t projection_right, // edge
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 float space_size, // size of blank
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
140 float initial_pitch, // guess at 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
141 float &sp_sd, // space sd
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 int16_t &mid_cuts, // no of free cuts
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 ICOORDELT_LIST *row_cells, // list of chop pts
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 bool testing_on, // individual words
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 int16_t start = 0, // start of good range
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 int16_t end = 0 // end of good range
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diff changeset
147 );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 float compute_pitch_sd2( // find fp cells
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parents:
diff changeset
149 TO_ROW *row, // row to do
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 STATS *projection, // vertical projection
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 int16_t projection_left, // edge
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
152 int16_t projection_right, // edge
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
153 float initial_pitch, // guess at 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
154 int16_t &occupation, // no of occupied cells
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 int16_t &mid_cuts, // no of free cuts
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 ICOORDELT_LIST *row_cells, // list of chop pts
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 bool testing_on, // individual words
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 int16_t start = 0, // start of good range
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 int16_t end = 0 // end of good range
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 );
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 void print_pitch_sd( // find fp cells
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 TO_ROW *row, // row to do
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 STATS *projection, // vertical projection
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 int16_t projection_left, // edges //size of blank
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 int16_t projection_right, float space_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 float initial_pitch // guess at 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
167 );
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 void find_repeated_chars(TO_BLOCK *block, // Block to search.
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 bool testing_on); // Debug mode.
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 plot_fp_word( // draw block of words
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 TO_BLOCK *block, // block to draw
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 float pitch, // pitch to draw 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
173 float nonspace // for space threshold
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
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 } // namespace tesseract
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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177
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parents:
diff changeset
178 #endif