Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/werd.h @ 33:c4daa0c83d64

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 17:55:13 +0200
parents b50eed0cc0ef
children
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1 /**********************************************************************
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2 * File: werd.h
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3 * Description: Code for the WERD class.
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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 WERD_H
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20 #define WERD_H
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22 #include "elst2.h"
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23 #include "params.h"
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24 #include "stepblob.h"
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26 #include <bitset>
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28 namespace tesseract {
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30 enum WERD_FLAGS {
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31 W_SEGMENTED, ///< correctly segmented
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32 W_ITALIC, ///< italic text
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33 W_BOLD, ///< bold text
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34 W_BOL, ///< start of line
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35 W_EOL, ///< end of line
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36 W_NORMALIZED, ///< flags
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37 W_SCRIPT_HAS_XHEIGHT, ///< x-height concept makes sense.
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38 W_SCRIPT_IS_LATIN, ///< Special case latin for y. splitting.
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39 W_DONT_CHOP, ///< fixed pitch chopped
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40 W_REP_CHAR, ///< repeated character
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41 W_FUZZY_SP, ///< fuzzy space
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42 W_FUZZY_NON, ///< fuzzy nonspace
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43 W_INVERSE ///< white on black
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44 };
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46 enum DISPLAY_FLAGS {
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47 /* Display flags bit number allocations */
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48 DF_BOX, ///< Bounding box
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49 DF_TEXT, ///< Correct ascii
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50 DF_POLYGONAL, ///< Polyg approx
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51 DF_EDGE_STEP, ///< Edge steps
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52 DF_BN_POLYGONAL, ///< BL normalisd polyapx
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53 DF_BLAMER ///< Blamer information
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54 };
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56 class ROW; // forward decl
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58 class TESS_API WERD : public ELIST2_LINK {
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59 public:
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60 WERD() = default;
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61 // WERD constructed with:
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62 // blob_list - blobs of the word (we take this list's contents)
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63 // blanks - number of blanks before the word
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64 // text - correct text (outlives WERD)
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65 WERD(C_BLOB_LIST *blob_list, uint8_t blanks, const char *text);
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66
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67 // WERD constructed from:
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68 // blob_list - blobs in the word
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69 // clone - werd to clone flags, etc from.
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70 WERD(C_BLOB_LIST *blob_list, WERD *clone);
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72 // Construct a WERD from a single_blob and clone the flags from this.
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73 // W_BOL and W_EOL flags are set according to the given values.
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74 WERD *ConstructFromSingleBlob(bool bol, bool eol, C_BLOB *blob);
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76 ~WERD() = default;
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78 // assignment
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79 WERD &operator=(const WERD &source);
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81 // This method returns a new werd constructed using the blobs in the input
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82 // all_blobs list, which correspond to the blobs in this werd object. The
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83 // blobs used to construct the new word are consumed and removed from the
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84 // input all_blobs list.
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85 // Returns nullptr if the word couldn't be constructed.
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86 // Returns original blobs for which no matches were found in the output list
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87 // orphan_blobs (appends).
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88 WERD *ConstructWerdWithNewBlobs(C_BLOB_LIST *all_blobs, C_BLOB_LIST *orphan_blobs);
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90 // Accessors for reject / DUFF blobs in various formats
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91 C_BLOB_LIST *rej_cblob_list() { // compact format
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92 return &rej_cblobs;
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93 }
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95 // Accessors for good blobs in various formats.
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96 C_BLOB_LIST *cblob_list() { // get compact blobs
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97 return &cblobs;
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98 }
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99
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100 uint8_t space() const { // access function
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101 return blanks;
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102 }
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103 void set_blanks(uint8_t new_blanks) {
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104 blanks = new_blanks;
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105 }
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parents:
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106 int script_id() const {
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107 return script_id_;
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108 }
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109 void set_script_id(int id) {
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110 script_id_ = id;
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111 }
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112
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113 // Returns the (default) bounding box including all the dots.
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114 TBOX bounding_box() const; // compute bounding box
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115 // Returns the bounding box including the desired combination of upper and
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116 // lower noise/diacritic elements.
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117 TBOX restricted_bounding_box(bool upper_dots, bool lower_dots) const;
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118 // Returns the bounding box of only the good blobs.
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119 TBOX true_bounding_box() const;
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120
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121 const char *text() const {
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122 return correct.c_str();
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123 }
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124 void set_text(const char *new_text) {
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125 correct = new_text;
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126 }
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127
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128 bool flag(WERD_FLAGS mask) const {
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129 return flags[mask];
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130 }
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131 void set_flag(WERD_FLAGS mask, bool value) {
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132 flags.set(mask, value);
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133 }
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134
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135 bool display_flag(uint8_t flag) const {
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136 return disp_flags[flag];
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137 }
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138 void set_display_flag(uint8_t flag, bool value) {
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139 disp_flags.set(flag, value);
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140 }
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141
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142 WERD *shallow_copy(); // shallow copy word
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143
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144 // reposition word by vector
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145 void move(const ICOORD vec);
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146
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147 // join other's blobs onto this werd, emptying out other.
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148 void join_on(WERD *other);
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149
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150 // copy other's blobs onto this word, leaving other intact.
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parents:
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151 void copy_on(WERD *other);
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152
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153 // tprintf word metadata (but not blob innards)
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154 void print() const;
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155
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156 #ifndef GRAPHICS_DISABLED
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157 // plot word on window in a uniform colour
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158 void plot(ScrollView *window, ScrollView::Color colour);
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159
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160 // Get the next color in the (looping) rainbow.
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diff changeset
161 static ScrollView::Color NextColor(ScrollView::Color colour);
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162
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163 // plot word on window in a rainbow of colours
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parents:
diff changeset
164 void plot(ScrollView *window);
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165
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166 // plot rejected blobs in a rainbow of colours
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parents:
diff changeset
167 void plot_rej_blobs(ScrollView *window);
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diff changeset
168 #endif // !GRAPHICS_DISABLED
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169
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170 // Removes noise from the word by moving small outlines to the rej_cblobs
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parents:
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171 // list, based on the size_threshold.
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parents:
diff changeset
172 void CleanNoise(float size_threshold);
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173
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174 // Extracts all the noise outlines and stuffs the pointers into the given
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parents:
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175 // vector of outlines. Afterwards, the outlines vector owns the pointers.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 void GetNoiseOutlines(std::vector<C_OUTLINE *> *outlines);
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177 // Adds the selected outlines to the indcated real blobs, and puts the rest
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178 // back in rej_cblobs where they came from. Where the target_blobs entry is
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179 // nullptr, a run of wanted outlines is put into a single new blob.
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180 // Ownership of the outlines is transferred back to the word. (Hence
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parents:
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181 // vector and not PointerVector.)
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182 // Returns true if any new blob was added to the start of the word, which
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 // suggests that it might need joining to the word before it, and likewise
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parents:
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184 // sets make_next_word_fuzzy true if any new blob was added to the end.
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parents:
diff changeset
185 bool AddSelectedOutlines(const std::vector<bool> &wanted,
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diff changeset
186 const std::vector<C_BLOB *> &target_blobs,
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diff changeset
187 const std::vector<C_OUTLINE *> &outlines, bool *make_next_word_fuzzy);
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188
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189 private:
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parents:
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190 uint8_t blanks = 0; // no of blanks
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parents:
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191 std::bitset<16> flags; // flags about word
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parents:
diff changeset
192 std::bitset<16> disp_flags; // display flags
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parents:
diff changeset
193 int16_t script_id_ = 0; // From unicharset.
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parents:
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194 std::string correct; // correct text
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parents:
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195 C_BLOB_LIST cblobs; // compacted blobs
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196 C_BLOB_LIST rej_cblobs; // DUFF blobs
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197 };
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198
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199 ELIST2IZEH(WERD)
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200
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201 } // namespace tesseract
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202
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203 #include "ocrrow.h" // placed here due to
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204
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205 namespace tesseract {
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206
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207 // compare words by increasing order of left edge, suitable for qsort(3)
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208 int word_comparator(const void *word1p, const void *word2p);
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209
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210 } // namespace tesseract
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211
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212 #endif