Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/leptonica/src/jbclass.h @ 20:eb3dd22fef2c

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FIX: the new "sdist" build target is PHONY also
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 22:04:13 +0200
parents b50eed0cc0ef
children
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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26
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27 #ifndef LEPTONICA_JBCLASS_H
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28 #define LEPTONICA_JBCLASS_H
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29
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30 /*!
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31 * \file jbclass.h
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32 *
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33 * JbClasser
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34 * JbData
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35 */
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36
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37
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38 /*!
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39 * <pre>
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40 * The JbClasser struct holds all the data accumulated during the
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41 * classification process that can be used for a compressed
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42 * jbig2-type representation of a set of images. This is created
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43 * in an initialization process and added to as the selected components
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44 * on each successive page are analyzed.
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45 * </pre>
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46 */
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47 struct JbClasser
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48 {
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49 struct Sarray *safiles; /*!< input page image file names */
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50 l_int32 method; /*!< JB_RANKHAUS, JB_CORRELATION */
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51 l_int32 components; /*!< JB_CONN_COMPS, JB_CHARACTERS or */
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52 /*!< JB_WORDS */
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53 l_int32 maxwidth; /*!< max component width allowed */
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54 l_int32 maxheight; /*!< max component height allowed */
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55 l_int32 npages; /*!< number of pages already processed */
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56 l_int32 baseindex; /*!< number components already processed */
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57 /*!< on fully processed pages */
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58 struct Numa *nacomps; /*!< number of components on each page */
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59 l_int32 sizehaus; /*!< size of square struct elem for haus */
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60 l_float32 rankhaus; /*!< rank val of haus match, each way */
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61 l_float32 thresh; /*!< thresh value for correlation score */
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62 l_float32 weightfactor; /*!< corrects thresh value for heaver */
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63 /*!< components; use 0 for no correction */
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64 struct Numa *naarea; /*!< w * h of each template, without */
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65 /*!< extra border pixels */
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66 l_int32 w; /*!< max width of original src images */
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67 l_int32 h; /*!< max height of original src images */
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68 l_int32 nclass; /*!< current number of classes */
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69 l_int32 keep_pixaa; /*!< If zero, pixaa isn't filled */
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70 struct Pixaa *pixaa; /*!< instances for each class; unbordered */
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71 struct Pixa *pixat; /*!< templates for each class; bordered */
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72 /*!< and not dilated */
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73 struct Pixa *pixatd; /*!< templates for each class; bordered */
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74 /*!< and dilated */
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75 struct L_DnaHash *dahash; /*!< Hash table to find templates by size */
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76 struct Numa *nafgt; /*!< fg areas of undilated templates; */
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77 /*!< only used for rank < 1.0 */
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78 struct Pta *ptac; /*!< centroids of all bordered cc */
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79 struct Pta *ptact; /*!< centroids of all bordered template cc */
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80 struct Numa *naclass; /*!< array of class ids for each component */
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81 struct Numa *napage; /*!< array of page nums for each component */
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82 struct Pta *ptaul; /*!< array of UL corners at which the */
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83 /*!< template is to be placed for each */
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84 /*!< component */
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85 struct Pta *ptall; /*!< similar to ptaul, but for LL corners */
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86 };
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87 typedef struct JbClasser JBCLASSER;
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88
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89
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90 /*!
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91 * <pre>
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92 * The JbData struct holds all the data required for
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93 * the compressed jbig-type representation of a set of images.
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94 * The data can be written to file, read back, and used
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95 * to regenerate an approximate version of the original,
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96 * which differs in two ways from the original:
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97 * (1) It uses a template image for each c.c. instead of the
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98 * original instance, for each occurrence on each page.
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99 * (2) It discards components with either a height or width larger
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100 * than the maximuma, given here by the lattice dimensions
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101 * used for storing the templates.
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102 * </pre>
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103 */
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104 struct JbData
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105 {
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106 struct Pix *pix; /*!< template composite for all classes */
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107 l_int32 npages; /*!< number of pages */
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108 l_int32 w; /*!< max width of original page images */
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109 l_int32 h; /*!< max height of original page images */
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110 l_int32 nclass; /*!< number of classes */
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111 l_int32 latticew; /*!< lattice width for template composite */
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112 l_int32 latticeh; /*!< lattice height for template composite */
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113 struct Numa *naclass; /*!< array of class ids for each component */
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114 struct Numa *napage; /*!< array of page nums for each component */
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115 struct Pta *ptaul; /*!< array of UL corners at which the */
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116 /*!< template is to be placed for each */
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117 /*!< component */
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118 };
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119 typedef struct JbData JBDATA;
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120
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121
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122 /*! JB Classifier */
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123 enum {
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124 JB_RANKHAUS = 0,
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125 JB_CORRELATION = 1
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126 };
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127
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128 /*! For jbGetComponents(): type of component to extract from images */
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129 /*! JB Component */
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130 enum {
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131 JB_CONN_COMPS = 0,
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132 JB_CHARACTERS = 1,
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133 JB_WORDS = 2
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134 };
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135
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136 /*! These parameters are used for naming the two files
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137 * in which the jbig2-like compressed data is stored. */
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138 #define JB_TEMPLATE_EXT ".templates.png"
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139 #define JB_DATA_EXT ".data"
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140
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141
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142 #endif /* LEPTONICA_JBCLASS_H */