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<h1>itkPathFunctions.h</h1><a href="itkPathFunctions_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*=========================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Program: Insight Segmentation & Registration Toolkit</span>
<a name="l00004"></a>00004 <span class="comment"> Module: $RCSfile: itkPathFunctions.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"> Language: C++</span>
<a name="l00006"></a>00006 <span class="comment"> Date: $Date: 2009-02-19 19:41:23 $</span>
<a name="l00007"></a>00007 <span class="comment"> Version: $Revision: 1.6 $</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> Copyright (c) Insight Software Consortium. All rights reserved.</span>
<a name="l00010"></a>00010 <span class="comment"> See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even </span>
<a name="l00013"></a>00013 <span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR </span>
<a name="l00014"></a>00014 <span class="comment"> PURPOSE. See the above copyright notices for more information.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">=========================================================================*/</span>
<a name="l00017"></a>00017 <span class="preprocessor">#ifndef __itkPathFunctions_h</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define __itkPathFunctions_h</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#include "<a class="code" href="itkPath_8h.html">itkPath.h</a>"</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="itkChainCodePath_8h.html">itkChainCodePath.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="itkFourierSeriesPath_8h.html">itkFourierSeriesPath.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="itkOffset_8h.html">itkOffset.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <math.h></span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keyword">namespace </span>itk
<a name="l00028"></a>00028 {
<a name="l00033"></a>00033 <span class="keyword">template</span> <<span class="keyword">class</span> TChainCodePath, <span class="keyword">class</span> TPathInput>
<a name="l00034"></a><a class="code" href="namespaceitk.html#b1513dc0898c533132d6c44e0ef259b5">00034</a> <span class="keywordtype">void</span> <a class="code" href="namespaceitk.html#b1513dc0898c533132d6c44e0ef259b5">MakeChainCodeTracePath</a>( TChainCodePath & chainPath,
<a name="l00035"></a>00035 <span class="keyword">const</span> TPathInput & inPath,
<a name="l00036"></a>00036 <span class="keywordtype">bool</span> restrictMovement = <span class="keyword">false</span> )
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="keyword">typedef</span> <span class="keyword">typename</span> TChainCodePath::OffsetType OffsetType;
<a name="l00039"></a>00039 <span class="keyword">typedef</span> <span class="keyword">typename</span> TChainCodePath::InputType ChainInputType;
<a name="l00040"></a>00040 <span class="keyword">typedef</span> <span class="keyword">typename</span> TChainCodePath::OutputType ChainOutputType;
<a name="l00041"></a>00041 <span class="keyword">typedef</span> <span class="keyword">typename</span> TPathInput::InputType InPathInputType;
<a name="l00042"></a>00042 <span class="keyword">typedef</span> <span class="keyword">typename</span> TPathInput::OutputType InPathOutputType;
<a name="l00043"></a>00043
<a name="l00044"></a>00044 OffsetType offset, tempOffset, zeroOffset;
<a name="l00045"></a>00045 InPathInputType inPathInput;
<a name="l00046"></a>00046 <span class="keywordtype">int</span> dimension = OffsetType::GetOffsetDimension();
<a name="l00047"></a>00047
<a name="l00048"></a>00048 zeroOffset.Fill(0);
<a name="l00049"></a>00049
<a name="l00050"></a>00050 chainPath.Clear();
<a name="l00051"></a>00051 inPathInput = inPath.StartOfInput();
<a name="l00052"></a>00052 chainPath.SetStart( inPath.EvaluateToIndex( inPathInput ) );
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keywordflow">for</span>(ChainInputType chainInput=0;;)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 offset = inPath.IncrementInput(inPathInput);
<a name="l00057"></a>00057 <span class="keywordflow">if</span>( zeroOffset == offset ) { <span class="keywordflow">break</span>; }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">if</span>( ! restrictMovement )
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 chainPath.InsertStep( chainInput++, offset );
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 <span class="keywordflow">else</span>
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> d=0; d<dimension; d++ )
<a name="l00066"></a>00066 {
<a name="l00067"></a>00067 tempOffset.Fill(0);
<a name="l00068"></a>00068 tempOffset[d] = offset[d];
<a name="l00069"></a>00069 chainPath.InsertStep( chainInput++, tempOffset );
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00081"></a>00081 <span class="keyword">template</span> <<span class="keyword">class</span> TFourierSeriesPath, <span class="keyword">class</span> TChainCodePath>
<a name="l00082"></a><a class="code" href="namespaceitk.html#6aee9cd53233785b725a08acc89c8b10">00082</a> <span class="keywordtype">void</span> <a class="code" href="namespaceitk.html#6aee9cd53233785b725a08acc89c8b10">MakeFourierSeriesPathTraceChainCode</a>( TFourierSeriesPath & FSPath,
<a name="l00083"></a>00083 <span class="keyword">const</span> TChainCodePath & chainPath,
<a name="l00084"></a>00084 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> numHarmonics = 8 )
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#be32dc19e71d40322ad9828b9ab40853">TFourierSeriesPath::IndexType</a> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#be32dc19e71d40322ad9828b9ab40853">IndexType</a>;
<a name="l00087"></a>00087 <span class="keyword">typedef</span> <span class="keyword">typename</span> TFourierSeriesPath::OffsetType OffsetType;
<a name="l00088"></a>00088 <span class="keyword">typedef</span> <span class="keyword">typename</span> TFourierSeriesPath::VectorType VectorType;
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keyword">typedef</span> <span class="keyword">typename</span> TFourierSeriesPath::InputType FSInputType;
<a name="l00092"></a>00092 <span class="keyword">typedef</span> <span class="keyword">typename</span> TFourierSeriesPath::OutputType FSOutputType;
<a name="l00093"></a>00093 <span class="keyword">typedef</span> <span class="keyword">typename</span> TChainCodePath::InputType ChainInputType;
<a name="l00094"></a>00094 <span class="keyword">typedef</span> <span class="keyword">typename</span> TChainCodePath::OutputType ChainOutputType;
<a name="l00095"></a>00095
<a name="l00096"></a>00096 IndexType index;
<a name="l00097"></a>00097 VectorType indexVector;
<a name="l00098"></a>00098 VectorType cosCoefficient;
<a name="l00099"></a>00099 VectorType sinCoefficient;
<a name="l00100"></a>00100 FSInputType theta;
<a name="l00101"></a>00101 <span class="keywordtype">int</span> dimension = OffsetType::GetOffsetDimension();
<a name="l00102"></a>00102 <span class="keywordtype">unsigned</span> numSteps = chainPath.NumberOfSteps();
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keyword">const</span> <span class="keywordtype">double</span> PI = 4.0 * atan( 1.0 );
<a name="l00105"></a>00105
<a name="l00106"></a>00106 FSPath.Clear();
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">// Adjust our private copy of numHarmonics if necessary</span>
<a name="l00109"></a>00109 <span class="keywordflow">if</span>( numHarmonics <= 1 )
<a name="l00110"></a>00110 numHarmonics = 2;
<a name="l00111"></a>00111 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( numHarmonics*2 > numSteps )
<a name="l00112"></a>00112 numHarmonics = numSteps / 2;
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> n=0; n<numHarmonics; n++ )
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 index = chainPath.GetStart();
<a name="l00117"></a>00117 cosCoefficient.Fill(0.0);
<a name="l00118"></a>00118 sinCoefficient.Fill(0.0);
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">for</span>( ChainInputType step=0; step<numSteps; step++ )
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122 index += chainPath.Evaluate( step );
<a name="l00123"></a>00123 theta = 2 * n * PI * ( double(step+1)) / numSteps;
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="comment">// turn the current index into a vector</span>
<a name="l00126"></a>00126 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> d=0; d<dimension; d++ )
<a name="l00127"></a>00127 {
<a name="l00128"></a>00128 indexVector[d] = index[d];
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 cosCoefficient += indexVector * (cos(theta)/numSteps);
<a name="l00131"></a>00131 sinCoefficient += indexVector * (sin(theta)/numSteps);
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a>00134 FSPath.AddHarmonic( cosCoefficient, sinCoefficient );
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138 } <span class="comment">// end namespace itk</span>
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="preprocessor">#endif</span>
<a name="l00141"></a>00141 <span class="preprocessor"></span>
</pre></div></div>
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