Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccutil/params.h @ 31:baeb8bdeff3a

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 13:11:30 +0200
parents b50eed0cc0ef
children
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1 /**********************************************************************
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2 * File: params.h
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3 * Description: Class definitions of the *_VAR classes for tunable constants.
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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 PARAMS_H
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20 #define PARAMS_H
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22 #include <tesseract/export.h> // for TESS_API
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24 #include <cstdint>
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25 #include <cstdio>
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26 #include <cstring>
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27 #include <string>
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28 #include <vector>
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30 namespace tesseract {
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32 class IntParam;
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33 class BoolParam;
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34 class StringParam;
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35 class DoubleParam;
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36 class TFile;
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38 // Enum for constraints on what kind of params should be set by SetParam().
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39 enum SetParamConstraint {
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40 SET_PARAM_CONSTRAINT_NONE,
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41 SET_PARAM_CONSTRAINT_DEBUG_ONLY,
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42 SET_PARAM_CONSTRAINT_NON_DEBUG_ONLY,
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43 SET_PARAM_CONSTRAINT_NON_INIT_ONLY,
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44 };
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46 struct ParamsVectors {
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47 std::vector<IntParam *> int_params;
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48 std::vector<BoolParam *> bool_params;
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49 std::vector<StringParam *> string_params;
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50 std::vector<DoubleParam *> double_params;
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51 };
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53 // Utility functions for working with Tesseract parameters.
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54 class TESS_API ParamUtils {
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55 public:
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56 // Reads a file of parameter definitions and set/modify the values therein.
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57 // If the filename begins with a + or -, the BoolVariables will be
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58 // ORed or ANDed with any current values.
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59 // Blank lines and lines beginning # are ignored.
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60 // Values may have any whitespace after the name and are the rest of line.
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61 static bool ReadParamsFile(const char *file, // filename to read
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62 SetParamConstraint constraint, ParamsVectors *member_params);
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64 // Read parameters from the given file pointer.
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65 static bool ReadParamsFromFp(SetParamConstraint constraint, TFile *fp,
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66 ParamsVectors *member_params);
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68 // Set a parameters to have the given value.
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69 static bool SetParam(const char *name, const char *value, SetParamConstraint constraint,
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70 ParamsVectors *member_params);
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72 // Returns the pointer to the parameter with the given name (of the
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73 // appropriate type) if it was found in the vector obtained from
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74 // GlobalParams() or in the given member_params.
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75 template <class T>
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76 static T *FindParam(const char *name, const std::vector<T *> &global_vec,
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77 const std::vector<T *> &member_vec) {
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78 for (auto *param : global_vec) {
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79 if (strcmp(param->name_str(), name) == 0) {
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80 return param;
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81 }
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82 }
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83 for (auto *param : member_vec) {
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84 if (strcmp(param->name_str(), name) == 0) {
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85 return param;
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86 }
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87 }
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88 return nullptr;
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89 }
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90 // Removes the given pointer to the param from the given vector.
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91 template <class T>
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92 static void RemoveParam(T *param_ptr, std::vector<T *> *vec) {
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93 for (auto it = vec->begin(); it != vec->end(); ++it) {
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94 if (*it == param_ptr) {
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95 vec->erase(it);
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96 break;
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97 }
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98 }
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99 }
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100 // Fetches the value of the named param as a string. Returns false if not
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101 // found.
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102 static bool GetParamAsString(const char *name, const ParamsVectors *member_params,
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103 std::string *value);
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104
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105 // Print parameters to the given file.
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106 static void PrintParams(FILE *fp, const ParamsVectors *member_params);
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107
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108 // Resets all parameters back to default values;
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109 static void ResetToDefaults(ParamsVectors *member_params);
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110 };
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111
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112 // Definition of various parameter types.
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113 class Param {
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114 public:
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115 ~Param() = default;
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116
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117 const char *name_str() const {
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118 return name_;
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119 }
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120 const char *info_str() const {
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121 return info_;
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122 }
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123 bool is_init() const {
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124 return init_;
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125 }
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126 bool is_debug() const {
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127 return debug_;
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128 }
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129 bool constraint_ok(SetParamConstraint constraint) const {
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130 return (constraint == SET_PARAM_CONSTRAINT_NONE ||
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131 (constraint == SET_PARAM_CONSTRAINT_DEBUG_ONLY && this->is_debug()) ||
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132 (constraint == SET_PARAM_CONSTRAINT_NON_DEBUG_ONLY && !this->is_debug()) ||
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133 (constraint == SET_PARAM_CONSTRAINT_NON_INIT_ONLY && !this->is_init()));
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134 }
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135
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136 protected:
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137 Param(const char *name, const char *comment, bool init)
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138 : name_(name), info_(comment), init_(init) {
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139 debug_ = (strstr(name, "debug") != nullptr) || (strstr(name, "display"));
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140 }
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141
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142 const char *name_; // name of this parameter
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143 const char *info_; // for menus
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144 bool init_; // needs to be set before init
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145 bool debug_;
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146 };
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147
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148 class IntParam : public Param {
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149 public:
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150 IntParam(int32_t value, const char *name, const char *comment, bool init, ParamsVectors *vec)
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151 : Param(name, comment, init) {
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152 value_ = value;
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153 default_ = value;
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154 params_vec_ = &(vec->int_params);
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155 vec->int_params.push_back(this);
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156 }
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157 ~IntParam() {
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158 ParamUtils::RemoveParam<IntParam>(this, params_vec_);
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159 }
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160 operator int32_t() const {
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161 return value_;
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162 }
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163 void operator=(int32_t value) {
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164 value_ = value;
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165 }
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166 void set_value(int32_t value) {
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167 value_ = value;
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168 }
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169 void ResetToDefault() {
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170 value_ = default_;
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171 }
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172 void ResetFrom(const ParamsVectors *vec) {
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173 for (auto *param : vec->int_params) {
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174 if (strcmp(param->name_str(), name_) == 0) {
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175 // printf("overriding param %s=%d by =%d\n", name_, value_,
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176 // param);
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177 value_ = *param;
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178 break;
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179 }
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180 }
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181 }
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182
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183 private:
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184 int32_t value_;
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185 int32_t default_;
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186 // Pointer to the vector that contains this param (not owned by this class).
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187 std::vector<IntParam *> *params_vec_;
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188 };
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189
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190 class BoolParam : public Param {
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191 public:
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192 BoolParam(bool value, const char *name, const char *comment, bool init, ParamsVectors *vec)
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193 : Param(name, comment, init) {
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194 value_ = value;
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195 default_ = value;
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196 params_vec_ = &(vec->bool_params);
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197 vec->bool_params.push_back(this);
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198 }
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199 ~BoolParam() {
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200 ParamUtils::RemoveParam<BoolParam>(this, params_vec_);
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201 }
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202 operator bool() const {
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203 return value_;
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204 }
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205 void operator=(bool value) {
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206 value_ = value;
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207 }
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208 void set_value(bool value) {
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209 value_ = value;
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210 }
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211 void ResetToDefault() {
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212 value_ = default_;
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213 }
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214 void ResetFrom(const ParamsVectors *vec) {
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215 for (auto *param : vec->bool_params) {
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216 if (strcmp(param->name_str(), name_) == 0) {
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217 // printf("overriding param %s=%s by =%s\n", name_, value_ ? "true" :
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218 // "false", *param ? "true" : "false");
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219 value_ = *param;
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220 break;
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221 }
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222 }
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223 }
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224
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225 private:
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226 bool value_;
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227 bool default_;
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228 // Pointer to the vector that contains this param (not owned by this class).
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229 std::vector<BoolParam *> *params_vec_;
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230 };
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231
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232 class StringParam : public Param {
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233 public:
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234 StringParam(const char *value, const char *name, const char *comment, bool init,
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235 ParamsVectors *vec)
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236 : Param(name, comment, init) {
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237 value_ = value;
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238 default_ = value;
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239 params_vec_ = &(vec->string_params);
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240 vec->string_params.push_back(this);
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241 }
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242 ~StringParam() {
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243 ParamUtils::RemoveParam<StringParam>(this, params_vec_);
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244 }
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245 operator std::string &() {
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246 return value_;
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247 }
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248 const char *c_str() const {
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249 return value_.c_str();
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250 }
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251 bool contains(char c) const {
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252 return value_.find(c) != std::string::npos;
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253 }
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254 bool empty() const {
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255 return value_.empty();
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256 }
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257 bool operator==(const std::string &other) const {
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258 return value_ == other;
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259 }
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260 void operator=(const std::string &value) {
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diff changeset
261 value_ = value;
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262 }
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diff changeset
263 void set_value(const std::string &value) {
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264 value_ = value;
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265 }
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266 void ResetToDefault() {
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267 value_ = default_;
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268 }
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diff changeset
269 void ResetFrom(const ParamsVectors *vec) {
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270 for (auto *param : vec->string_params) {
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diff changeset
271 if (strcmp(param->name_str(), name_) == 0) {
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272 // printf("overriding param %s=%s by =%s\n", name_, value_,
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diff changeset
273 // param->c_str());
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diff changeset
274 value_ = *param;
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275 break;
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276 }
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277 }
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278 }
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279
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diff changeset
280 private:
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diff changeset
281 std::string value_;
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diff changeset
282 std::string default_;
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diff changeset
283 // Pointer to the vector that contains this param (not owned by this class).
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diff changeset
284 std::vector<StringParam *> *params_vec_;
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diff changeset
285 };
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diff changeset
286
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diff changeset
287 class DoubleParam : public Param {
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288 public:
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diff changeset
289 DoubleParam(double value, const char *name, const char *comment, bool init, ParamsVectors *vec)
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diff changeset
290 : Param(name, comment, init) {
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diff changeset
291 value_ = value;
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diff changeset
292 default_ = value;
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diff changeset
293 params_vec_ = &(vec->double_params);
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diff changeset
294 vec->double_params.push_back(this);
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295 }
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diff changeset
296 ~DoubleParam() {
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diff changeset
297 ParamUtils::RemoveParam<DoubleParam>(this, params_vec_);
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diff changeset
298 }
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diff changeset
299 operator double() const {
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diff changeset
300 return value_;
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diff changeset
301 }
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diff changeset
302 void operator=(double value) {
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diff changeset
303 value_ = value;
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diff changeset
304 }
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parents:
diff changeset
305 void set_value(double value) {
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306 value_ = value;
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307 }
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308 void ResetToDefault() {
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309 value_ = default_;
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310 }
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311 void ResetFrom(const ParamsVectors *vec) {
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312 for (auto *param : vec->double_params) {
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313 if (strcmp(param->name_str(), name_) == 0) {
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314 // printf("overriding param %s=%f by =%f\n", name_, value_,
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315 // *param);
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316 value_ = *param;
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317 break;
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318 }
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319 }
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320 }
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321
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322 private:
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323 double value_;
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324 double default_;
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325 // Pointer to the vector that contains this param (not owned by this class).
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326 std::vector<DoubleParam *> *params_vec_;
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327 };
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328
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329 // Global parameter lists.
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330 //
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331 // To avoid the problem of undetermined order of static initialization
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332 // global_params are accessed through the GlobalParams function that
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333 // initializes the static pointer to global_params only on the first time
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334 // GlobalParams() is called.
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335 //
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336 // TODO(daria): remove GlobalParams() when all global Tesseract
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337 // parameters are converted to members.
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338 TESS_API
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339 ParamsVectors *GlobalParams();
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340
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341 /*************************************************************************
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342 * Note on defining parameters.
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343 *
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344 * The values of the parameters defined with *_INIT_* macros are guaranteed
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345 * to be loaded from config files before Tesseract initialization is done
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346 * (there is no such guarantee for parameters defined with the other macros).
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347 *************************************************************************/
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348
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349 #define INT_VAR_H(name) ::tesseract::IntParam name
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350
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351 #define BOOL_VAR_H(name) ::tesseract::BoolParam name
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352
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353 #define STRING_VAR_H(name) ::tesseract::StringParam name
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354
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355 #define double_VAR_H(name) ::tesseract::DoubleParam name
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356
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357 #define INT_VAR(name, val, comment) \
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358 ::tesseract::IntParam name(val, #name, comment, false, ::tesseract::GlobalParams())
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359
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360 #define BOOL_VAR(name, val, comment) \
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361 ::tesseract::BoolParam name(val, #name, comment, false, ::tesseract::GlobalParams())
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362
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363 #define STRING_VAR(name, val, comment) \
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364 ::tesseract::StringParam name(val, #name, comment, false, ::tesseract::GlobalParams())
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365
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366 #define double_VAR(name, val, comment) \
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367 ::tesseract::DoubleParam name(val, #name, comment, false, ::tesseract::GlobalParams())
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368
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369 #define INT_MEMBER(name, val, comment, vec) name(val, #name, comment, false, vec)
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370
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371 #define BOOL_MEMBER(name, val, comment, vec) name(val, #name, comment, false, vec)
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372
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373 #define STRING_MEMBER(name, val, comment, vec) name(val, #name, comment, false, vec)
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374
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375 #define double_MEMBER(name, val, comment, vec) name(val, #name, comment, false, vec)
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376
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377 #define INT_INIT_MEMBER(name, val, comment, vec) name(val, #name, comment, true, vec)
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378
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379 #define BOOL_INIT_MEMBER(name, val, comment, vec) name(val, #name, comment, true, vec)
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380
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381 #define STRING_INIT_MEMBER(name, val, comment, vec) name(val, #name, comment, true, vec)
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382
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383 #define double_INIT_MEMBER(name, val, comment, vec) name(val, #name, comment, true, vec)
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384
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385 } // namespace tesseract
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386
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387 #endif