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<h1>itkWindowedSincInterpolateImageFunction.h</h1><a href="itkWindowedSincInterpolateImageFunction_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 &amp; Registration Toolkit</span>
<a name="l00004"></a>00004 <span class="comment">  Module:    $RCSfile: itkWindowedSincInterpolateImageFunction.h,v $</span>
<a name="l00005"></a>00005 <span class="comment">  Language:  C++</span>
<a name="l00006"></a>00006 <span class="comment">  Date:      $Date: 2006-03-19 04:36:59 $</span>
<a name="l00007"></a>00007 <span class="comment">  Version:   $Revision: 1.8 $</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 __itkWindowedSincInterpolateImageFunction_h</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define __itkWindowedSincInterpolateImageFunction_h</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include "<a class="code" href="itkConstNeighborhoodIterator_8h.html">itkConstNeighborhoodIterator.h</a>"</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include "<a class="code" href="itkConstantBoundaryCondition_8h.html">itkConstantBoundaryCondition.h</a>"</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="itkInterpolateImageFunction_8h.html">itkInterpolateImageFunction.h</a>"</span>
<a name="l00023"></a>00023 
<a name="l00024"></a>00024 <span class="keyword">namespace </span>itk
<a name="l00025"></a>00025 {
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 <span class="keyword">namespace </span>Function {
<a name="l00028"></a>00028 
<a name="l00035"></a>00035 <span class="keyword">template</span>&lt; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00036"></a>00036   <span class="keyword">class </span>TInput=double, <span class="keyword">class </span>TOutput=<span class="keywordtype">double</span>&gt;
<a name="l00037"></a><a class="code" href="classitk_1_1Function_1_1CosineWindowFunction.html">00037</a> <span class="keyword">class </span><a class="code" href="classitk_1_1Function_1_1CosineWindowFunction.html" title="Window function for sinc interpolation. .">CosineWindowFunction</a>
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="keyword">public</span>:
<a name="l00040"></a><a class="code" href="classitk_1_1Function_1_1CosineWindowFunction.html#cccafb8c0fa256625e0a04c409cee52c">00040</a>   <span class="keyword">inline</span> TOutput <a class="code" href="classitk_1_1Function_1_1CosineWindowFunction.html#cccafb8c0fa256625e0a04c409cee52c">operator()</a>( <span class="keyword">const</span> TInput &amp; <a class="code" href="classA.html">A</a> )<span class="keyword"> const</span>
<a name="l00041"></a>00041 <span class="keyword">    </span>{ <span class="keywordflow">return</span> (TOutput) vcl_cos(A * m_Factor ); }
<a name="l00042"></a>00042 <span class="keyword">private</span>:
<a name="l00043"></a>00043 
<a name="l00045"></a>00045   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor;
<a name="l00046"></a>00046 }; 
<a name="l00047"></a>00047 
<a name="l00054"></a>00054 <span class="keyword">template</span>&lt; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00055"></a>00055   <span class="keyword">class </span>TInput=double, <span class="keyword">class </span>TOutput=<span class="keywordtype">double</span>&gt;
<a name="l00056"></a><a class="code" href="classitk_1_1Function_1_1HammingWindowFunction.html">00056</a> <span class="keyword">class </span><a class="code" href="classitk_1_1Function_1_1HammingWindowFunction.html" title="Window function for sinc interpolation. .">HammingWindowFunction</a>
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="keyword">public</span>:
<a name="l00059"></a><a class="code" href="classitk_1_1Function_1_1HammingWindowFunction.html#99f00ffaf33e4fac3e2eefdd902bead8">00059</a>   <span class="keyword">inline</span> TOutput <a class="code" href="classitk_1_1Function_1_1HammingWindowFunction.html#99f00ffaf33e4fac3e2eefdd902bead8">operator()</a>( <span class="keyword">const</span> TInput &amp; <a class="code" href="classA.html">A</a> )<span class="keyword"> const</span>
<a name="l00060"></a>00060 <span class="keyword">   </span>{ <span class="keywordflow">return</span> (TOutput) 0.54 + 0.46 * vcl_cos(A * m_Factor ); }
<a name="l00061"></a>00061 <span class="keyword">private</span>:
<a name="l00062"></a>00062 
<a name="l00064"></a>00064   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor;
<a name="l00065"></a>00065 }; 
<a name="l00066"></a>00066 
<a name="l00073"></a>00073 <span class="keyword">template</span>&lt; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00074"></a>00074   <span class="keyword">class </span>TInput=double, <span class="keyword">class </span>TOutput=<span class="keywordtype">double</span>&gt;
<a name="l00075"></a><a class="code" href="classitk_1_1Function_1_1WelchWindowFunction.html">00075</a> <span class="keyword">class </span><a class="code" href="classitk_1_1Function_1_1WelchWindowFunction.html" title="Window function for sinc interpolation. .">WelchWindowFunction</a>
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 <span class="keyword">public</span>:
<a name="l00078"></a><a class="code" href="classitk_1_1Function_1_1WelchWindowFunction.html#657d26ce4dde34b16ab886e08e914c04">00078</a>   <span class="keyword">inline</span> TOutput <a class="code" href="classitk_1_1Function_1_1WelchWindowFunction.html#657d26ce4dde34b16ab886e08e914c04">operator()</a>( <span class="keyword">const</span> TInput &amp; <a class="code" href="classA.html">A</a> )<span class="keyword"> const</span>
<a name="l00079"></a>00079 <span class="keyword">   </span>{ <span class="keywordflow">return</span> (TOutput) (1.0 - A * m_Factor * A); }
<a name="l00080"></a>00080 <span class="keyword">private</span>:
<a name="l00081"></a>00081 
<a name="l00083"></a>00083   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor;
<a name="l00084"></a>00084 }; 
<a name="l00085"></a>00085 
<a name="l00094"></a>00094 <span class="keyword">template</span>&lt; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00095"></a>00095   <span class="keyword">class </span>TInput=double, <span class="keyword">class </span>TOutput=<span class="keywordtype">double</span>&gt;
<a name="l00096"></a><a class="code" href="classitk_1_1Function_1_1LanczosWindowFunction.html">00096</a> <span class="keyword">class </span><a class="code" href="classitk_1_1Function_1_1LanczosWindowFunction.html" title="Window function for sinc interpolation.  Note: Paper referenced in WindowedSincInterpolateImageFunct...">LanczosWindowFunction</a>
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098 <span class="keyword">public</span>:
<a name="l00099"></a><a class="code" href="classitk_1_1Function_1_1LanczosWindowFunction.html#96a49c5716b38ed3e4a1bcfd80ce8403">00099</a>   <span class="keyword">inline</span> TOutput <a class="code" href="classitk_1_1Function_1_1LanczosWindowFunction.html#96a49c5716b38ed3e4a1bcfd80ce8403">operator()</a>( <span class="keyword">const</span> TInput &amp; <a class="code" href="classA.html">A</a> )<span class="keyword"> const</span>
<a name="l00100"></a>00100 <span class="keyword">    </span>{
<a name="l00101"></a>00101     <span class="keywordflow">if</span>(A == 0.0) <span class="keywordflow">return</span> (TOutput) 1.0;
<a name="l00102"></a>00102     <span class="keywordtype">double</span> z = m_Factor * A;
<a name="l00103"></a>00103     <span class="keywordflow">return</span> (TOutput) ( vcl_sin(z) / z ); 
<a name="l00104"></a>00104     }
<a name="l00105"></a>00105 <span class="keyword">private</span>:
<a name="l00106"></a>00106 
<a name="l00108"></a>00108   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor;
<a name="l00109"></a>00109 }; 
<a name="l00110"></a>00110 
<a name="l00117"></a>00117 <span class="keyword">template</span>&lt; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00118"></a>00118   <span class="keyword">class </span>TInput=double, <span class="keyword">class </span>TOutput=<span class="keywordtype">double</span>&gt;
<a name="l00119"></a><a class="code" href="classitk_1_1Function_1_1BlackmanWindowFunction.html">00119</a> <span class="keyword">class </span><a class="code" href="classitk_1_1Function_1_1BlackmanWindowFunction.html" title="Window function for sinc interpolation. .">BlackmanWindowFunction</a>
<a name="l00120"></a>00120 {
<a name="l00121"></a>00121 <span class="keyword">public</span>:
<a name="l00122"></a><a class="code" href="classitk_1_1Function_1_1BlackmanWindowFunction.html#0379aca8d0a7008f2500673bc100a324">00122</a>   <span class="keyword">inline</span> TOutput <a class="code" href="classitk_1_1Function_1_1BlackmanWindowFunction.html#0379aca8d0a7008f2500673bc100a324">operator()</a>( <span class="keyword">const</span> TInput &amp; <a class="code" href="classA.html">A</a> )<span class="keyword"> const</span>
<a name="l00123"></a>00123 <span class="keyword">    </span>{
<a name="l00124"></a>00124     <span class="keywordflow">return</span> (TOutput)
<a name="l00125"></a>00125       (0.42 + 0.5 * vcl_cos(A * m_Factor1) + 0.08 * vcl_cos(A * m_Factor2));
<a name="l00126"></a>00126     }
<a name="l00127"></a>00127 <span class="keyword">private</span>:
<a name="l00128"></a>00128 
<a name="l00130"></a>00130   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor1;
<a name="l00131"></a>00131 
<a name="l00133"></a>00133   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> m_Factor2;
<a name="l00134"></a>00134 }; 
<a name="l00135"></a>00135 
<a name="l00136"></a>00136 } <span class="comment">// namespace Function</span>
<a name="l00137"></a>00137 
<a name="l00247"></a>00247 <span class="keyword">template</span> &lt;
<a name="l00248"></a>00248   <span class="keyword">class </span>TInputImage, 
<a name="l00249"></a>00249   <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> VRadius, 
<a name="l00250"></a>00250   <span class="keyword">class </span>TWindowFunction = Function::HammingWindowFunction&lt;VRadius&gt;,
<a name="l00251"></a>00251   <span class="keyword">class </span>TBoundaryCondition = ConstantBoundaryCondition&lt;TInputImage&gt;,
<a name="l00252"></a>00252   <span class="keyword">class </span>TCoordRep=<span class="keywordtype">double</span> &gt;
<a name="l00253"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html">00253</a> <span class="keyword">class </span><a class="code" href="itkWin32Header_8h.html#7d4384322557205d75f0719c012dded6">ITK_EXPORT</a> <a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a> : 
<a name="l00254"></a>00254   <span class="keyword">public</span> <a class="code" href="classitk_1_1InterpolateImageFunction.html" title="Base class for all image interpolaters.">InterpolateImageFunction</a>&lt;TInputImage, TCoordRep&gt;
<a name="l00255"></a>00255 {
<a name="l00256"></a>00256 <span class="keyword">public</span>:
<a name="l00257"></a>00257 
<a name="l00259"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#98a387f265fe2b712e1f794e520653d9">00259</a>   <span class="keyword">typedef</span> <a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a>            <a class="code" href="classitk_1_1LightObject.html" title="Light weight base class for most itk classes.">Self</a>;
<a name="l00260"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#fa30ee1d967861dfe06c2fe004af5ff5">00260</a>   <span class="keyword">typedef</span> <a class="code" href="classitk_1_1InterpolateImageFunction.html">InterpolateImageFunction&lt;TInputImage,TCoordRep&gt;</a> <a class="code" href="classitk_1_1LightObject.html" title="Light weight base class for most itk classes.">Superclass</a>;
<a name="l00261"></a>00261 
<a name="l00262"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#591f7f69bf57823f95bb71e70a61d9c8">00262</a>   <span class="keyword">typedef</span> <a class="code" href="classitk_1_1SmartPointer.html">SmartPointer&lt;Self&gt;</a>        <a class="code" href="classitk_1_1SmartPointer.html">Pointer</a>;
<a name="l00263"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#d5d1a70ce6821970d20ae00eb79e937c">00263</a>   <span class="keyword">typedef</span> <a class="code" href="classitk_1_1SmartPointer.html">SmartPointer&lt;const Self&gt;</a>  <a class="code" href="classitk_1_1SmartPointer.html">ConstPointer</a>;
<a name="l00264"></a>00264   
<a name="l00266"></a>00266   <a class="code" href="itkMacro_8h.html#574c1f86661d409dd32c742307a0e96a">itkTypeMacro</a>(<a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a>, 
<a name="l00267"></a>00267     <a class="code" href="classitk_1_1InterpolateImageFunction.html" title="Base class for all image interpolaters.">InterpolateImageFunction</a>);
<a name="l00268"></a>00268 
<a name="l00270"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#0a11e6c3a586986aadee0bf046b10ab6">00270</a>   <a class="code" href="itkMacro_8h.html#0fdc15685afa271857c57e7cd482f30c">itkNewMacro</a>(<a class="code" href="classitk_1_1LightObject.html" title="Light weight base class for most itk classes.">Self</a>);  
<a name="l00271"></a>00271 
<a name="l00273"></a>00273   <span class="keyword">typedef</span> <span class="keyword">typename</span> Superclass::OutputType OutputType;
<a name="l00274"></a>00274 
<a name="l00276"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#1f30678b9fb670165850e56573d37ed2">00276</a>   <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#3742cbac150bee74daa9aab85ed80623">Superclass::InputImageType</a> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#3742cbac150bee74daa9aab85ed80623">InputImageType</a>;
<a name="l00277"></a>00277 
<a name="l00279"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#73a0ffa5bfdf70f27a3d979bc2db49b6">00279</a>   <span class="keyword">typedef</span> <span class="keyword">typename</span> Superclass::RealType RealType;
<a name="l00280"></a>00280 
<a name="l00282"></a>00282   <a class="code" href="itkMacro_8h.html#1905cf6b2e88235996fa7ff73b2fb0eb">itkStaticConstMacro</a>(ImageDimension, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>,Superclass::ImageDimension);
<a name="l00283"></a>00283 
<a name="l00285"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#6080e11a88de5dd7f42708c570501313">00285</a>   <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#be32dc19e71d40322ad9828b9ab40853">Superclass::IndexType</a> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#be32dc19e71d40322ad9828b9ab40853">IndexType</a>;
<a name="l00286"></a>00286 
<a name="l00288"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#ec447c59a5519755d268385375f42ec0">00288</a>   <span class="keyword">typedef</span> TInputImage ImageType;
<a name="l00289"></a>00289 
<a name="l00291"></a><a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html#f05027d4a91b86d4bc7774efb0f33b94">00291</a>   <span class="keyword">typedef</span> <span class="keyword">typename</span> Superclass::ContinuousIndexType ContinuousIndexType;
<a name="l00292"></a>00292 
<a name="l00293"></a>00293   <span class="keyword">virtual</span> <span class="keywordtype">void</span> SetInputImage(<span class="keyword">const</span> ImageType *image);
<a name="l00294"></a>00294 
<a name="l00301"></a>00301   <span class="keyword">virtual</span> OutputType EvaluateAtContinuousIndex( 
<a name="l00302"></a>00302     <span class="keyword">const</span> ContinuousIndexType &amp; index ) <span class="keyword">const</span>;
<a name="l00303"></a>00303 
<a name="l00304"></a>00304 <span class="keyword">protected</span>:
<a name="l00305"></a>00305   <a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a>();
<a name="l00306"></a>00306   <span class="keyword">virtual</span> ~<a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a>();
<a name="l00307"></a>00307   <span class="keywordtype">void</span> <a class="code" href="namespaceHardConnectedComponentImageFilter.html#920ae03048a5ad715d803ca2e92b52de">PrintSelf</a>(std::ostream&amp; os, <a class="code" href="classitk_1_1Indent.html" title="Control indentation during Print() invocation.">Indent</a> indent) <span class="keyword">const</span>;
<a name="l00308"></a>00308 
<a name="l00309"></a>00309 <span class="keyword">private</span>:
<a name="l00310"></a>00310   <a class="code" href="classitk_1_1WindowedSincInterpolateImageFunction.html" title="Use the windowed sinc function to interpolate.">WindowedSincInterpolateImageFunction</a>( <span class="keyword">const</span> <a class="code" href="classitk_1_1LightObject.html" title="Light weight base class for most itk classes.">Self</a>&amp; ); <span class="comment">//not implemented</span>
<a name="l00311"></a>00311   <span class="keywordtype">void</span> operator=( <span class="keyword">const</span> <a class="code" href="classitk_1_1LightObject.html" title="Light weight base class for most itk classes.">Self</a>&amp; ); <span class="comment">//purposely not implemented</span>
<a name="l00312"></a>00312 
<a name="l00313"></a>00313   <span class="comment">// Internal typedefs</span>
<a name="l00314"></a>00314   <span class="keyword">typedef</span> <a class="code" href="classitk_1_1ConstNeighborhoodIterator.html" title="Const version of NeighborhoodIterator, defining iteration of a local N-dimensional...">ConstNeighborhoodIterator</a>&lt;
<a name="l00315"></a>00315     ImageType, TBoundaryCondition&gt; <a class="code" href="classitk_1_1ConstNeighborhoodIterator.html" title="Const version of NeighborhoodIterator, defining iteration of a local N-dimensional...">IteratorType</a>;
<a name="l00316"></a>00316 
<a name="l00317"></a>00317   <span class="comment">// Constant to store twice the radius</span>
<a name="l00318"></a>00318   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_WindowSize;
<a name="l00319"></a>00319 
<a name="l00321"></a>00321   TWindowFunction m_WindowFunction;
<a name="l00322"></a>00322 
<a name="l00325"></a>00325   <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *m_OffsetTable;
<a name="l00326"></a>00326 
<a name="l00328"></a>00328   <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_OffsetTableSize;
<a name="l00329"></a>00329 
<a name="l00331"></a>00331   <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> **m_WeightOffsetTable;
<a name="l00332"></a>00332 
<a name="l00334"></a>00334   <span class="keyword">inline</span> <span class="keywordtype">double</span> Sinc(<span class="keywordtype">double</span> x)<span class="keyword"> const</span>
<a name="l00335"></a>00335 <span class="keyword">    </span>{ 
<a name="l00336"></a>00336     <span class="keywordtype">double</span> px = vnl_math::pi * x;
<a name="l00337"></a>00337     <span class="keywordflow">return</span> (x == 0.0) ? 1.0 : vcl_sin(px) / px;
<a name="l00338"></a>00338     }
<a name="l00339"></a>00339 };
<a name="l00341"></a>00341 
<a name="l00342"></a>00342 } <span class="comment">// namespace itk</span>
<a name="l00343"></a>00343 
<a name="l00344"></a>00344 <span class="preprocessor">#ifndef ITK_MANUAL_INSTANTIATION</span>
<a name="l00345"></a>00345 <span class="preprocessor"></span><span class="preprocessor">#include "itkWindowedSincInterpolateImageFunction.txx"</span>
<a name="l00346"></a>00346 <span class="preprocessor">#endif</span>
<a name="l00347"></a>00347 <span class="preprocessor"></span>
<a name="l00348"></a>00348 <span class="preprocessor">#endif // _itkWindowedSincInterpolateImageFunction_h</span>
<a name="l00349"></a>00349 <span class="preprocessor"></span>
</pre></div></div>
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