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 <span id="projectnumber">3.03</span>
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<div class="title">/usr/local/google/home/jbreiden/tesseract-ocr-read-only/cube/cube_object.h</div> </div>
102
<div class="contents">
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<a href="a00985.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
104
<a name="l00002"></a>00002 <span class="comment"> * File: cube_object.h</span>
105
<a name="l00003"></a>00003 <span class="comment"> * Description: Declaration of the Cube Object Class</span>
106
<a name="l00004"></a>00004 <span class="comment"> * Author: Ahmad Abdulkader</span>
107
<a name="l00005"></a>00005 <span class="comment"> * Created: 2007</span>
108
<a name="l00006"></a>00006 <span class="comment"> *</span>
109
<a name="l00007"></a>00007 <span class="comment"> * (C) Copyright 2008, Google Inc.</span>
110
<a name="l00008"></a>00008 <span class="comment"> ** Licensed under the Apache License, Version 2.0 (the "License");</span>
111
<a name="l00009"></a>00009 <span class="comment"> ** you may not use this file except in compliance with the License.</span>
112
<a name="l00010"></a>00010 <span class="comment"> ** You may obtain a copy of the License at</span>
113
<a name="l00011"></a>00011 <span class="comment"> ** http://www.apache.org/licenses/LICENSE-2.0</span>
114
<a name="l00012"></a>00012 <span class="comment"> ** Unless required by applicable law or agreed to in writing, software</span>
115
<a name="l00013"></a>00013 <span class="comment"> ** distributed under the License is distributed on an "AS IS" BASIS,</span>
116
<a name="l00014"></a>00014 <span class="comment"> ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
117
<a name="l00015"></a>00015 <span class="comment"> ** See the License for the specific language governing permissions and</span>
118
<a name="l00016"></a>00016 <span class="comment"> ** limitations under the License.</span>
119
<a name="l00017"></a>00017 <span class="comment"> *</span>
120
<a name="l00018"></a>00018 <span class="comment"> **********************************************************************/</span>
121
<a name="l00019"></a>00019
122
<a name="l00020"></a>00020 <span class="comment">// The CubeObject class is the main class used to perform recognition of</span>
123
<a name="l00021"></a>00021 <span class="comment">// a specific char_samp as a single word.</span>
124
<a name="l00022"></a>00022 <span class="comment">// To recognize a word, a CubeObject is constructed for this word.</span>
125
<a name="l00023"></a>00023 <span class="comment">// A Call to RecognizeWord is then issued specifying the language model that</span>
126
<a name="l00024"></a>00024 <span class="comment">// will be used during recognition. If none is specified, the default language</span>
127
<a name="l00025"></a>00025 <span class="comment">// model in the CubeRecoContext is used. The CubeRecoContext is passed at</span>
128
<a name="l00026"></a>00026 <span class="comment">// construction time</span>
129
<a name="l00027"></a>00027 <span class="comment">//</span>
130
<a name="l00028"></a>00028 <span class="comment">// The typical usage pattern for Cube is shown below:</span>
131
<a name="l00029"></a>00029 <span class="comment">//</span>
132
<a name="l00030"></a>00030 <span class="comment">// // Create and initialize Tesseract object and get its</span>
133
<a name="l00031"></a>00031 <span class="comment">// // CubeRecoContext object (note that Tesseract object owns it,</span>
134
<a name="l00032"></a>00032 <span class="comment">// // so it will be freed when the Tesseract object is freed).</span>
135
<a name="l00033"></a>00033 <span class="comment">// tesseract::Tesseract *tess_obj = new tesseract::Tesseract();</span>
136
<a name="l00034"></a>00034 <span class="comment">// tess_obj->init_tesseract(data_path, lang, tesseract::OEM_CUBE_ONLY);</span>
137
<a name="l00035"></a>00035 <span class="comment">// CubeRecoContext *cntxt = tess_obj->GetCubeRecoContext();</span>
138
<a name="l00036"></a>00036 <span class="comment">// CHECK(cntxt != NULL) << "Unable to create a Cube reco context";</span>
139
<a name="l00037"></a>00037 <span class="comment">// .</span>
140
<a name="l00038"></a>00038 <span class="comment">// .</span>
141
<a name="l00039"></a>00039 <span class="comment">// .</span>
142
<a name="l00040"></a>00040 <span class="comment">// // Do this to recognize a word in pix whose co-ordinates are</span>
143
<a name="l00041"></a>00041 <span class="comment">// // (left,top,width,height)</span>
144
<a name="l00042"></a>00042 <span class="comment">// tesseract::CubeObject *cube_obj;</span>
145
<a name="l00043"></a>00043 <span class="comment">// cube_obj = new tesseract::CubeObject(cntxt, pix,</span>
146
<a name="l00044"></a>00044 <span class="comment">// left, top, width, height);</span>
147
<a name="l00045"></a>00045 <span class="comment">//</span>
148
<a name="l00046"></a>00046 <span class="comment">// // Get back Cube's list of answers</span>
149
<a name="l00047"></a>00047 <span class="comment">// tesseract::WordAltList *alt_list = cube_obj->RecognizeWord();</span>
150
<a name="l00048"></a>00048 <span class="comment">// CHECK(alt_list != NULL && alt_list->AltCount() > 0);</span>
151
<a name="l00049"></a>00049 <span class="comment">//</span>
152
<a name="l00050"></a>00050 <span class="comment">// // Get the string and cost of every alternate</span>
153
<a name="l00051"></a>00051 <span class="comment">// for (int alt = 0; alt < alt_list->AltCount(); alt++) {</span>
154
<a name="l00052"></a>00052 <span class="comment">// // Return the result as a UTF-32 string</span>
155
<a name="l00053"></a>00053 <span class="comment">// string_32 res_str32 = alt_list->Alt(alt);</span>
156
<a name="l00054"></a>00054 <span class="comment">// // Convert to UTF8 if need-be</span>
157
<a name="l00055"></a>00055 <span class="comment">// string res_str;</span>
158
<a name="l00056"></a>00056 <span class="comment">// CubeUtils::UTF32ToUTF8(res_str32.c_str(), &res_str);</span>
159
<a name="l00057"></a>00057 <span class="comment">// // Get the string cost. This should get bigger as you go deeper</span>
160
<a name="l00058"></a>00058 <span class="comment">// // in the list</span>
161
<a name="l00059"></a>00059 <span class="comment">// int cost = alt_list->AltCost(alt);</span>
162
<a name="l00060"></a>00060 <span class="comment">// }</span>
163
<a name="l00061"></a>00061 <span class="comment">//</span>
164
<a name="l00062"></a>00062 <span class="comment">// // Call this once you are done recognizing this word</span>
165
<a name="l00063"></a>00063 <span class="comment">// delete cube_obj;</span>
166
<a name="l00064"></a>00064 <span class="comment">//</span>
167
<a name="l00065"></a>00065 <span class="comment">// // Call this once you are done recognizing all words with</span>
168
<a name="l00066"></a>00066 <span class="comment">// // for the current language</span>
169
<a name="l00067"></a>00067 <span class="comment">// delete tess_obj;</span>
170
<a name="l00068"></a>00068 <span class="comment">//</span>
171
<a name="l00069"></a>00069 <span class="comment">// Note that if the language supports "Italics" (see the CubeRecoContext), the</span>
172
<a name="l00070"></a>00070 <span class="comment">// RecognizeWord function attempts to de-slant the word.</span>
173
<a name="l00071"></a>00071
174
<a name="l00072"></a>00072 <span class="preprocessor">#ifndef CUBE_OBJECT_H</span>
175
<a name="l00073"></a>00073 <span class="preprocessor"></span><span class="preprocessor">#define CUBE_OBJECT_H</span>
176
<a name="l00074"></a>00074 <span class="preprocessor"></span>
177
<a name="l00075"></a>00075 <span class="preprocessor">#include "<a class="code" href="a00965.html">char_samp.h</a>"</span>
178
<a name="l00076"></a>00076 <span class="preprocessor">#include "<a class="code" href="a01015.html">word_altlist.h</a>"</span>
179
<a name="l00077"></a>00077 <span class="preprocessor">#include "<a class="code" href="a00955.html">beam_search.h</a>"</span>
180
<a name="l00078"></a>00078 <span class="preprocessor">#include "<a class="code" href="a00987.html">cube_search_object.h</a>"</span>
181
<a name="l00079"></a>00079 <span class="preprocessor">#include "<a class="code" href="a01012.html">tess_lang_model.h</a>"</span>
182
<a name="l00080"></a>00080 <span class="preprocessor">#include "<a class="code" href="a00674.html">cube_reco_context.h</a>"</span>
183
<a name="l00081"></a>00081
184
<a name="l00082"></a>00082 <span class="keyword">namespace </span><a class="code" href="a01266.html#afed58feacb84df2de88bdd613cfdba6d">tesseract</a> {
185
<a name="l00083"></a>00083
186
<a name="l00084"></a>00084 <span class="comment">// minimum aspect ratio needed to normalize a char_samp before recognition</span>
187
<a name="l00085"></a>00085 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">float</span> kMinNormalizationAspectRatio = 3.5;
188
<a name="l00086"></a>00086 <span class="comment">// minimum probability a top alt choice must meet before having</span>
189
<a name="l00087"></a>00087 <span class="comment">// deslanted processing applied to it</span>
190
<a name="l00088"></a>00088 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">float</span> kMinProbSkipDeslanted = 0.25;
191
<a name="l00089"></a>00089
192
<a name="l00090"></a><a class="code" href="a00338.html">00090</a> <span class="keyword">class </span><a class="code" href="a00338.html">CubeObject</a> {
193
<a name="l00091"></a>00091 <span class="keyword">public</span>:
194
<a name="l00092"></a>00092 <span class="comment">// Different flavors of constructor. They just differ in the way the</span>
195
<a name="l00093"></a>00093 <span class="comment">// word image is specified</span>
196
<a name="l00094"></a>00094 <a class="code" href="a00338.html#a89b0aff8c824fc507400648fcfbfde8a">CubeObject</a>(<a class="code" href="a00339.html">CubeRecoContext</a> *cntxt, <a class="code" href="a00306.html">CharSamp</a> *char_samp);
197
<a name="l00095"></a>00095 <a class="code" href="a00338.html#a89b0aff8c824fc507400648fcfbfde8a">CubeObject</a>(<a class="code" href="a00339.html">CubeRecoContext</a> *cntxt, Pix *pix,
198
<a name="l00096"></a>00096 <span class="keywordtype">int</span> left, <span class="keywordtype">int</span> top, <span class="keywordtype">int</span> wid, <span class="keywordtype">int</span> hgt);
199
<a name="l00097"></a>00097 <a class="code" href="a00338.html#a5817550d8ae8b003eb66e3caf1681936">~CubeObject</a>();
200
<a name="l00098"></a>00098
201
<a name="l00099"></a>00099 <span class="comment">// Perform the word recognition using the specified language mode. If none</span>
202
<a name="l00100"></a>00100 <span class="comment">// is specified, the default language model in the CubeRecoContext is used.</span>
203
<a name="l00101"></a>00101 <span class="comment">// Returns the sorted list of alternate word answers</span>
204
<a name="l00102"></a>00102 <a class="code" href="a00651.html">WordAltList</a> *<a class="code" href="a00338.html#ab6d0a0e600df7283105d9aace07bb35f">RecognizeWord</a>(<a class="code" href="a00445.html">LangModel</a> *lang_mod = NULL);
205
<a name="l00103"></a>00103 <span class="comment">// Same as RecognizeWord but recognizes as a phrase</span>
206
<a name="l00104"></a>00104 <a class="code" href="a00651.html">WordAltList</a> *<a class="code" href="a00338.html#a4f10da7950214b56885db746b31b17e2">RecognizePhrase</a>(<a class="code" href="a00445.html">LangModel</a> *lang_mod = NULL);
207
<a name="l00105"></a>00105 <span class="comment">// Computes the cost of a specific string. This is done by performing</span>
208
<a name="l00106"></a>00106 <span class="comment">// recognition of a language model that allows only the specified word.</span>
209
<a name="l00107"></a>00107 <span class="comment">// The alternate list(s) will be permanently modified.</span>
210
<a name="l00108"></a>00108 <span class="keywordtype">int</span> <a class="code" href="a00338.html#ac323f039f5255f195a4c69b08f5259a1">WordCost</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *str);
211
<a name="l00109"></a>00109 <span class="comment">// Recognizes a single character and returns the list of results.</span>
212
<a name="l00110"></a>00110 <a class="code" href="a00300.html">CharAltList</a> *<a class="code" href="a00338.html#a81f6bbfded6ee56256213ea3711ec5a5">RecognizeChar</a>();
213
<a name="l00111"></a>00111
214
<a name="l00112"></a>00112 <span class="comment">// Returns the BeamSearch object that resulted from the last call to</span>
215
<a name="l00113"></a>00113 <span class="comment">// RecognizeWord</span>
216
<a name="l00114"></a><a class="code" href="a00338.html#a26496fcab290ab89fc22173cea84c881">00114</a> <span class="keyword">inline</span> <a class="code" href="a00269.html">BeamSearch</a> *<a class="code" href="a00338.html#a26496fcab290ab89fc22173cea84c881">BeamObj</a>()<span class="keyword"> const </span>{
217
<a name="l00115"></a>00115 <span class="keywordflow">return</span> (deslanted_ == <span class="keyword">true</span> ? deslanted_beam_obj_ : beam_obj_);
218
<a name="l00116"></a>00116 }
219
<a name="l00117"></a>00117 <span class="comment">// Returns the WordAltList object that resulted from the last call to</span>
220
<a name="l00118"></a>00118 <span class="comment">// RecognizeWord</span>
221
<a name="l00119"></a><a class="code" href="a00338.html#a25575431067c7b13880772c0d6e5061b">00119</a> <span class="keyword">inline</span> <a class="code" href="a00651.html">WordAltList</a> *<a class="code" href="a00338.html#a25575431067c7b13880772c0d6e5061b">AlternateList</a>()<span class="keyword"> const </span>{
222
<a name="l00120"></a>00120 <span class="keywordflow">return</span> (deslanted_ == <span class="keyword">true</span> ? deslanted_alt_list_ : alt_list_);
223
<a name="l00121"></a>00121 }
224
<a name="l00122"></a>00122 <span class="comment">// Returns the CubeSearchObject object that resulted from the last call to</span>
225
<a name="l00123"></a>00123 <span class="comment">// RecognizeWord</span>
226
<a name="l00124"></a><a class="code" href="a00338.html#ad7160b69b2316a07a545ca972136ef89">00124</a> <span class="keyword">inline</span> <a class="code" href="a00340.html">CubeSearchObject</a> *<a class="code" href="a00338.html#ad7160b69b2316a07a545ca972136ef89">SrchObj</a>()<span class="keyword"> const </span>{
227
<a name="l00125"></a>00125 <span class="keywordflow">return</span> (deslanted_ == <span class="keyword">true</span> ? deslanted_srch_obj_ : srch_obj_);
228
<a name="l00126"></a>00126 }
229
<a name="l00127"></a>00127 <span class="comment">// Returns the CharSamp object that resulted from the last call to</span>
230
<a name="l00128"></a>00128 <span class="comment">// RecognizeWord. Note that this object is not necessarily identical to the</span>
231
<a name="l00129"></a>00129 <span class="comment">// one passed at construction time as normalization might have occurred</span>
232
<a name="l00130"></a><a class="code" href="a00338.html#adcaa18b8dcbc72c7f5c54061a3e5671c">00130</a> <span class="keyword">inline</span> <a class="code" href="a00306.html">CharSamp</a> *<a class="code" href="a00338.html#adcaa18b8dcbc72c7f5c54061a3e5671c">CharSample</a>()<span class="keyword"> const </span>{
233
<a name="l00131"></a>00131 <span class="keywordflow">return</span> (deslanted_ == <span class="keyword">true</span> ? deslanted_char_samp_ : char_samp_);
234
<a name="l00132"></a>00132 }
235
<a name="l00133"></a>00133
236
<a name="l00134"></a>00134 <span class="comment">// Set the ownership of the CharSamp</span>
237
<a name="l00135"></a><a class="code" href="a00338.html#a30b2460908222500b428d02035cc1cbe">00135</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="a00338.html#a30b2460908222500b428d02035cc1cbe">SetCharSampOwnership</a>(<span class="keywordtype">bool</span> own_char_samp) {
238
<a name="l00136"></a>00136 own_char_samp_ = own_char_samp;
239
<a name="l00137"></a>00137 }
240
<a name="l00138"></a>00138
241
<a name="l00139"></a>00139 <span class="keyword">protected</span>:
242
<a name="l00140"></a>00140 <span class="comment">// Normalize the CharSamp if its aspect ratio exceeds the below constant.</span>
243
<a name="l00141"></a>00141 <span class="keywordtype">bool</span> <a class="code" href="a00338.html#ae22cb0e4b62800ad7dbb62c3f4ec4453">Normalize</a>();
244
<a name="l00142"></a>00142
245
<a name="l00143"></a>00143 <span class="keyword">private</span>:
246
<a name="l00144"></a>00144 <span class="comment">// minimum segment count needed to normalize a char_samp before recognition</span>
247
<a name="l00145"></a>00145 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kMinNormalizationSegmentCnt = 4;
248
<a name="l00146"></a>00146
249
<a name="l00147"></a>00147 <span class="comment">// Data member initialization function</span>
250
<a name="l00148"></a>00148 <span class="keywordtype">void</span> Init();
251
<a name="l00149"></a>00149 <span class="comment">// Free alternate lists.</span>
252
<a name="l00150"></a>00150 <span class="keywordtype">void</span> Cleanup();
253
<a name="l00151"></a>00151 <span class="comment">// Perform the actual recognition using the specified language mode. If none</span>
254
<a name="l00152"></a>00152 <span class="comment">// is specified, the default language model in the CubeRecoContext is used.</span>
255
<a name="l00153"></a>00153 <span class="comment">// Returns the sorted list of alternate answers. Called by both</span>
256
<a name="l00154"></a>00154 <span class="comment">// RecognizerWord (word_mode is true) or RecognizePhrase (word mode is false)</span>
257
<a name="l00155"></a>00155 <a class="code" href="a00651.html">WordAltList</a> *Recognize(<a class="code" href="a00445.html">LangModel</a> *lang_mod, <span class="keywordtype">bool</span> word_mode);
258
<a name="l00156"></a>00156
259
<a name="l00157"></a>00157 <a class="code" href="a00339.html">CubeRecoContext</a> *cntxt_;
260
<a name="l00158"></a>00158 <a class="code" href="a00269.html">BeamSearch</a> *beam_obj_;
261
<a name="l00159"></a>00159 <a class="code" href="a00269.html">BeamSearch</a> *deslanted_beam_obj_;
262
<a name="l00160"></a>00160 <span class="keywordtype">bool</span> own_char_samp_;
263
<a name="l00161"></a>00161 <span class="keywordtype">bool</span> deslanted_;
264
<a name="l00162"></a>00162 <a class="code" href="a00306.html">CharSamp</a> *char_samp_;
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<a name="l00163"></a>00163 <a class="code" href="a00306.html">CharSamp</a> *deslanted_char_samp_;
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<a name="l00164"></a>00164 <a class="code" href="a00340.html">CubeSearchObject</a> *srch_obj_;
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<a name="l00165"></a>00165 <a class="code" href="a00340.html">CubeSearchObject</a> *deslanted_srch_obj_;
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<a name="l00166"></a>00166 <a class="code" href="a00651.html">WordAltList</a> *alt_list_;
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<a name="l00167"></a>00167 <a class="code" href="a00651.html">WordAltList</a> *deslanted_alt_list_;
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<a name="l00168"></a>00168 };
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<a name="l00169"></a>00169 }
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<a name="l00170"></a>00170
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<a name="l00171"></a>00171 <span class="preprocessor">#endif // CUBE_OBJECT_H</span>
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</pre></div></div><!-- contents -->
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onmouseover="return searchBox.OnSearchSelectShow()"
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<li class="navelem"><a class="el" href="a00985.html">cube_object.h</a> </li>
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