Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/tesseract/src/textord/pitsync1.h @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 /**********************************************************************
2 * File: pitsync1.h (Formerly pitsync.h)
3 * Description: Code to find the optimum fixed pitch segmentation of some blobs.
4 * Author: Ray Smith
5 * Created: Thu Nov 19 11:48:05 GMT 1992
6 *
7 * (C) Copyright 1992, Hewlett-Packard Ltd.
8 ** Licensed under the Apache License, Version 2.0 (the "License");
9 ** you may not use this file except in compliance with the License.
10 ** You may obtain a copy of the License at
11 ** http://www.apache.org/licenses/LICENSE-2.0
12 ** Unless required by applicable law or agreed to in writing, software
13 ** distributed under the License is distributed on an "AS IS" BASIS,
14 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 ** See the License for the specific language governing permissions and
16 ** limitations under the License.
17 *
18 **********************************************************************/
19
20 #ifndef PITSYNC1_H
21 #define PITSYNC1_H
22
23 #include "blobbox.h"
24 #include "clst.h"
25 #include "elst.h"
26 #include "params.h"
27 #include "pithsync.h"
28 #include "statistc.h"
29
30 namespace tesseract {
31
32 class FPSEGPT_LIST;
33
34 class FPSEGPT : public ELIST_LINK {
35 public:
36 FPSEGPT() = default;
37 FPSEGPT( // constructor
38 int16_t x); // position
39 FPSEGPT( // constructor
40 int16_t x, // position
41 bool faking, // faking this one
42 int16_t offset, // extra cost dist
43 int16_t region_index, // segment number
44 int16_t pitch, // proposed pitch
45 int16_t pitch_error, // allowed tolerance
46 FPSEGPT_LIST *prev_list); // previous segment
47 FPSEGPT(FPCUTPT *cutpt); // build from new type
48
49 int32_t position() { // access func
50 return xpos;
51 }
52 double cost_function() {
53 return cost;
54 }
55 double squares() {
56 return sq_sum;
57 }
58 double sum() {
59 return mean_sum;
60 }
61 FPSEGPT *previous() {
62 return pred;
63 }
64 int16_t cheap_cuts() const { // no of cheap cuts
65 return mid_cuts;
66 }
67
68 bool faked; // faked split point
69 bool terminal; // successful end
70 int16_t fake_count; // total fakes to here
71
72 private:
73 int16_t mid_cuts; // no of cheap cuts
74 int32_t xpos; // location
75 FPSEGPT *pred; // optimal previous
76 double mean_sum; // mean so far
77 double sq_sum; // summed distsances
78 double cost; // cost function
79 };
80
81 ELISTIZEH(FPSEGPT)
82 CLISTIZEH(FPSEGPT_LIST)
83 extern INT_VAR_H(pitsync_linear_version);
84 extern double_VAR_H(pitsync_joined_edge);
85 extern double_VAR_H(pitsync_offset_freecut_fraction);
86 double check_pitch_sync( // find segmentation
87 BLOBNBOX_IT *blob_it, // blobs to do
88 int16_t blob_count, // no of blobs
89 int16_t pitch, // pitch estimate
90 int16_t pitch_error, // tolerance
91 STATS *projection, // vertical
92 FPSEGPT_LIST *seg_list // output list
93 );
94 void make_illegal_segment( // find segmentation
95 FPSEGPT_LIST *prev_list, // previous segments
96 TBOX blob_box, // bounding box
97 BLOBNBOX_IT blob_it, // iterator
98 int16_t region_index, // number of segment
99 int16_t pitch, // pitch estimate
100 int16_t pitch_error, // tolerance
101 FPSEGPT_LIST *seg_list // output list
102 );
103 int16_t vertical_torow_projection( // project whole row
104 TO_ROW *row, // row to do
105 STATS *projection // output
106 );
107 void vertical_cblob_projection( // project outlines
108 C_BLOB *blob, // blob to project
109 STATS *stats // output
110 );
111 void vertical_coutline_projection( // project outlines
112 C_OUTLINE *outline, // outline to project
113 STATS *stats // output
114 );
115
116 } // namespace tesseract
117
118 #endif