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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/ccstruct/stepblob.h</div> </div>
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<div class="contents">
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<a href="a00800.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
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<a name="l00002"></a>00002 <span class="comment"> * File: stepblob.h (Formerly cblob.h)</span>
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<a name="l00003"></a>00003 <span class="comment"> * Description: Code for C_BLOB class.</span>
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<a name="l00004"></a>00004 <span class="comment"> * Author: Ray Smith</span>
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<a name="l00005"></a>00005 <span class="comment"> * Created: Tue Oct 08 10:41:13 BST 1991</span>
108
<a name="l00006"></a>00006 <span class="comment"> *</span>
109
<a name="l00007"></a>00007 <span class="comment"> * (C) Copyright 1991, Hewlett-Packard Ltd.</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>
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<a name="l00019"></a>00019
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<a name="l00020"></a>00020 <span class="preprocessor">#ifndef STEPBLOB_H</span>
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<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define STEPBLOB_H</span>
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<a name="l00022"></a>00022 <span class="preprocessor"></span>
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<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="a00740.html">coutln.h</a>"</span>
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<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="a00790.html">rect.h</a>"</span>
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 <span class="keyword">class </span><a class="code" href="a00289.html">C_BLOB</a>;
129
<a name="l00027"></a>00027 <span class="keyword">struct </span>Pix;
130
<a name="l00028"></a>00028 <a class="code" href="a00819.html#a6cf5144252ef24ea7bb5e0da1e698a0b">ELISTIZEH</a>(<a class="code" href="a00289.html">C_BLOB</a>)
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<a name="l00029"></a>00029
132
<a name="l00030"></a><a class="code" href="a00289.html">00030</a> class <a class="code" href="a00289.html">C_BLOB</a>:public <a class="code" href="a00369.html">ELIST_LINK</a>
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<a name="l00031"></a>00031 {
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<a name="l00032"></a>00032 <span class="keyword">public</span>:
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<a name="l00033"></a><a class="code" href="a00289.html#ab832423937669379b1f9df7acf95e0fb">00033</a> <a class="code" href="a00289.html#ab832423937669379b1f9df7acf95e0fb">C_BLOB</a>() {
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<a name="l00034"></a>00034 }
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<a name="l00035"></a>00035 <span class="keyword">explicit</span> <a class="code" href="a00289.html">C_BLOB</a>(C_OUTLINE_LIST *outline_list);
138
<a name="l00036"></a>00036 <span class="comment">// Simpler constructor to build a blob from a single outline that has</span>
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<a name="l00037"></a>00037 <span class="comment">// already been fully initialized.</span>
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<a name="l00038"></a>00038 <span class="keyword">explicit</span> <a class="code" href="a00289.html">C_BLOB</a>(<a class="code" href="a00290.html">C_OUTLINE</a>* outline);
141
<a name="l00039"></a>00039
142
<a name="l00040"></a>00040 <span class="comment">// Builds a set of one or more blobs from a list of outlines.</span>
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<a name="l00041"></a>00041 <span class="comment">// Input: one outline on outline_list contains all the others, but the</span>
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<a name="l00042"></a>00042 <span class="comment">// nesting and order are undefined.</span>
145
<a name="l00043"></a>00043 <span class="comment">// If good_blob is true, the blob is added to good_blobs_it, unless</span>
146
<a name="l00044"></a>00044 <span class="comment">// an illegal (generation-skipping) parent-child relationship is found.</span>
147
<a name="l00045"></a>00045 <span class="comment">// If so, the parent blob goes to bad_blobs_it, and the immediate children</span>
148
<a name="l00046"></a>00046 <span class="comment">// are promoted to the top level, recursively being sent to good_blobs_it.</span>
149
<a name="l00047"></a>00047 <span class="comment">// If good_blob is false, all created blobs will go to the bad_blobs_it.</span>
150
<a name="l00048"></a>00048 <span class="comment">// Output: outline_list is empty. One or more blobs are added to</span>
151
<a name="l00049"></a>00049 <span class="comment">// good_blobs_it and/or bad_blobs_it.</span>
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<a name="l00050"></a>00050 <span class="keyword">static</span> <span class="keywordtype">void</span> ConstructBlobsFromOutlines(<span class="keywordtype">bool</span> good_blob,
153
<a name="l00051"></a>00051 C_OUTLINE_LIST* outline_list,
154
<a name="l00052"></a>00052 C_BLOB_IT* good_blobs_it,
155
<a name="l00053"></a>00053 C_BLOB_IT* bad_blobs_it);
156
<a name="l00054"></a>00054
157
<a name="l00055"></a>00055 <span class="comment">// Sets the COUT_INVERSE flag appropriately on the outlines and their</span>
158
<a name="l00056"></a>00056 <span class="comment">// children recursively, reversing the outlines if needed so that</span>
159
<a name="l00057"></a>00057 <span class="comment">// everything has an anticlockwise top-level.</span>
160
<a name="l00058"></a>00058 <span class="keywordtype">void</span> CheckInverseFlagAndDirection();
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<a name="l00059"></a>00059
162
<a name="l00060"></a>00060 <span class="comment">// Build and return a fake blob containing a single fake outline with no</span>
163
<a name="l00061"></a>00061 <span class="comment">// steps.</span>
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<a name="l00062"></a>00062 <span class="keyword">static</span> <a class="code" href="a00289.html">C_BLOB</a>* FakeBlob(<span class="keyword">const</span> <a class="code" href="a00592.html">TBOX</a>& box);
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<a name="l00063"></a>00063
166
<a name="l00064"></a><a class="code" href="a00289.html#ae510f3d0e7398fbb46608082429eac89">00064</a> C_OUTLINE_LIST *<a class="code" href="a00289.html#ae510f3d0e7398fbb46608082429eac89">out_list</a>() { <span class="comment">//get outline list</span>
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<a name="l00065"></a>00065 <span class="keywordflow">return</span> &outlines;
168
<a name="l00066"></a>00066 }
169
<a name="l00067"></a>00067
170
<a name="l00068"></a>00068 <a class="code" href="a00592.html">TBOX</a> bounding_box(); <span class="comment">//compute bounding box</span>
171
<a name="l00069"></a>00069 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> area(); <span class="comment">//compute area</span>
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<a name="l00070"></a>00070 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> perimeter(); <span class="comment">// Total perimeter of outlines and 1st level children.</span>
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<a name="l00071"></a>00071 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> outer_area(); <span class="comment">//compute area</span>
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<a name="l00072"></a>00072 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> count_transitions( <span class="comment">//count maxima</span>
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<a name="l00073"></a>00073 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> threshold); <span class="comment">//size threshold</span>
176
<a name="l00074"></a>00074
177
<a name="l00075"></a>00075 <span class="keywordtype">void</span> move(<span class="keyword">const</span> <a class="code" href="a00409.html" title="integer coordinate">ICOORD</a> vec); <span class="comment">// repostion blob by vector</span>
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<a name="l00076"></a>00076 <span class="keywordtype">void</span> rotate(<span class="keyword">const</span> <a class="code" href="a00375.html">FCOORD</a>& rotation); <span class="comment">// Rotate by given vector.</span>
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<a name="l00077"></a>00077
180
<a name="l00078"></a>00078 <span class="comment">// Adds sub-pixel resolution EdgeOffsets for the outlines using greyscale</span>
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<a name="l00079"></a>00079 <span class="comment">// if the supplied pix is 8-bit or the binary edges if NULL.</span>
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<a name="l00080"></a>00080 <span class="keywordtype">void</span> ComputeEdgeOffsets(<span class="keywordtype">int</span> threshold, Pix* pix);
183
<a name="l00081"></a>00081
184
<a name="l00082"></a>00082 <span class="comment">// Estimates and returns the baseline position based on the shape of the</span>
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<a name="l00083"></a>00083 <span class="comment">// outlines.</span>
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<a name="l00084"></a>00084 <a class="code" href="a00831.html#a8d41499d38c24d39b221ab0c158fe5a8">inT16</a> EstimateBaselinePosition();
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<a name="l00085"></a>00085
188
<a name="l00086"></a>00086 <span class="comment">// Returns a Pix rendering of the blob. pixDestroy after use.</span>
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<a name="l00087"></a>00087 Pix* render();
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<a name="l00088"></a>00088 <span class="comment">// Returns a Pix rendering of the outline of the blob. (no fill).</span>
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<a name="l00089"></a>00089 <span class="comment">// pixDestroy after use.</span>
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<a name="l00090"></a>00090 Pix* <a class="code" href="a01251.html#a7ee7085b157e15b1651947b1e121f9b5">render_outline</a>();
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<a name="l00091"></a>00091
194
<a name="l00092"></a>00092 <span class="preprocessor"> #ifndef GRAPHICS_DISABLED</span>
195
<a name="l00093"></a>00093 <span class="preprocessor"></span> <span class="keywordtype">void</span> plot( <span class="comment">//draw one</span>
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<a name="l00094"></a>00094 <a class="code" href="a00532.html">ScrollView</a>* window, <span class="comment">//window to draw in</span>
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<a name="l00095"></a>00095 <a class="code" href="a00532.html#a100504544a5423a94222149ee9ed0fe8">ScrollView::Color</a> blob_colour, <span class="comment">//for outer bits</span>
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<a name="l00096"></a>00096 <a class="code" href="a00532.html#a100504544a5423a94222149ee9ed0fe8">ScrollView::Color</a> child_colour); <span class="comment">//for holes</span>
199
<a name="l00097"></a>00097 <span class="comment">// Draws the blob in the given colour, and child_colour, normalized</span>
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<a name="l00098"></a>00098 <span class="comment">// using the given denorm, making use of sub-pixel accurate information</span>
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<a name="l00099"></a>00099 <span class="comment">// if available.</span>
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<a name="l00100"></a>00100 <span class="keywordtype">void</span> plot_normed(<span class="keyword">const</span> <a class="code" href="a00352.html">DENORM</a>& denorm,
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<a name="l00101"></a>00101 <a class="code" href="a00532.html#a100504544a5423a94222149ee9ed0fe8">ScrollView::Color</a> blob_colour,
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<a name="l00102"></a>00102 <a class="code" href="a00532.html#a100504544a5423a94222149ee9ed0fe8">ScrollView::Color</a> child_colour,
205
<a name="l00103"></a>00103 <a class="code" href="a00532.html">ScrollView</a>* window);
206
<a name="l00104"></a>00104 <span class="preprocessor"> #endif // GRAPHICS_DISABLED</span>
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<a name="l00105"></a>00105 <span class="preprocessor"></span>
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<a name="l00106"></a><a class="code" href="a00289.html#aa8c06a443917a9504d29caa75c756361">00106</a> <a class="code" href="a00289.html">C_BLOB</a>& operator= (<span class="keyword">const</span> <a class="code" href="a00289.html">C_BLOB</a> & source) {
209
<a name="l00107"></a>00107 <span class="keywordflow">if</span> (!outlines.empty ())
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<a name="l00108"></a>00108 outlines.clear();
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<a name="l00109"></a>00109 outlines.<a class="code" href="a00289.html#abe4a0174938ec7e4d968382e8274c237">deep_copy</a>(&source.outlines, &<a class="code" href="a00290.html#aae5feeba94ae0da9e9ce1068d5e53a56">C_OUTLINE::deep_copy</a>);
212
<a name="l00110"></a>00110 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
213
<a name="l00111"></a>00111 }
214
<a name="l00112"></a>00112
215
<a name="l00113"></a><a class="code" href="a00289.html#abe4a0174938ec7e4d968382e8274c237">00113</a> <span class="keyword">static</span> <a class="code" href="a00289.html">C_BLOB</a>* <a class="code" href="a00289.html#abe4a0174938ec7e4d968382e8274c237">deep_copy</a>(<span class="keyword">const</span> <a class="code" href="a00289.html">C_BLOB</a>* src) {
216
<a name="l00114"></a>00114 <a class="code" href="a00289.html">C_BLOB</a>* blob = <span class="keyword">new</span> <a class="code" href="a00289.html">C_BLOB</a>;
217
<a name="l00115"></a>00115 *blob = *src;
218
<a name="l00116"></a>00116 <span class="keywordflow">return</span> blob;
219
<a name="l00117"></a>00117 }
220
<a name="l00118"></a>00118
221
<a name="l00119"></a>00119 <span class="keyword">private</span>:
222
<a name="l00120"></a>00120 C_OUTLINE_LIST outlines; <span class="comment">//master elements</span>
223
<a name="l00121"></a>00121 };
224
<a name="l00122"></a>00122
225
<a name="l00123"></a>00123 <span class="preprocessor">#endif</span>
226
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