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<h1>vtkImageFFT Class Reference</h1><!-- doxytag: class="vtkImageFFT" --><!-- doxytag: inherits="vtkImageFourierFilter" --><code>#include <<a class="el" href="a04696.html">vtkImageFFT.h</a>></code>
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Inheritance diagram for vtkImageFFT:</div>
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Collaboration diagram for vtkImageFFT:</div>
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<a href="a10862.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Fast Fourier Transform.
<p>
<a class="el" href="a00764.html" title="Fast Fourier Transform.">vtkImageFFT</a> implements a fast Fourier transform. The input can have real or complex data in any components and data types, but the output is always complex doubles with real values in component0, and imaginary values in component1. The filter is fastest for images that have power of two sizes. The filter uses a butterfly fitlers for each prime factor of the dimension. This makes images with prime number dimensions (i.e. 17x17) much slower to compute. Multi dimensional (i.e volumes) FFT's are decomposed so that each axis executes in series.<p>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_8.html#c2_vtk_t_vtkImageFFT">vtkImageFFT (Tests)</a> </dd></dl>
<p>Definition at line <a class="el" href="a04696.html#l00037">37</a> of file <a class="el" href="a04696.html">vtkImageFFT.h</a>.</p>
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<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="a00767.html">vtkImageFourierFilter</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#91bece84ce87675894c4825abc4f57f8">Superclass</a></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#9e1f4c87cd3cb3a202ef4da347d44055">GetClassName</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#61e00f3765d7b5a1f531f1061a4458d3">IsA</a> (const char *type)</td></tr>
<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#a8763d6d9326392a5aeea5e17fc0871a">SplitExtent</a> (int splitExt[6], int startExt[6], int num, int total)</td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00764.html">vtkImageFFT</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#83dda599031b426ff15d3190ad006411">New</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#da418e3cc64724cb7703bbf7ca505a79">IsTypeOf</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00764.html">vtkImageFFT</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#44c1f7d231d1cd15427c688d27d325f9">SafeDownCast</a> (<a class="el" href="a01084.html">vtkObject</a> *o)</td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#99fd2b9686296dea31d46ab1f187c2a7">vtkImageFFT</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#82f0baae7d05bc1378b2d0ed8480593d">~vtkImageFFT</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#6cb2417b46230b260b2c9650e57a1e44">IterativeRequestInformation</a> (<a class="el" href="a00872.html">vtkInformation</a> *in, <a class="el" href="a00872.html">vtkInformation</a> *out)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#469a59155f2e0ca8563032f700d145e9">IterativeRequestUpdateExtent</a> (<a class="el" href="a00872.html">vtkInformation</a> *in, <a class="el" href="a00872.html">vtkInformation</a> *out)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00764.html#108cedc16dd7a6ec8033925e061cc4da">ThreadedExecute</a> (<a class="el" href="a00751.html">vtkImageData</a> *inData, <a class="el" href="a00751.html">vtkImageData</a> *outData, int outExt[6], int threadId)</td></tr>
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<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="91bece84ce87675894c4825abc4f57f8"></a><!-- doxytag: member="vtkImageFFT::Superclass" ref="91bece84ce87675894c4825abc4f57f8" args="" -->
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<td class="memname">typedef <a class="el" href="a00767.html">vtkImageFourierFilter</a> <a class="el" href="a00767.html">vtkImageFFT::Superclass</a> </td>
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<p>
Construct an instance of <a class="el" href="a00754.html" title="Filters that execute axes in series.">vtkImageDecomposeFilter</a> filter with default dimensionality 3.
<p>Reimplemented from <a class="el" href="a00767.html#087db1e537ce1d42120ba4da56c3769b">vtkImageFourierFilter</a>.</p>
<p>Definition at line <a class="el" href="a04696.html#l00041">41</a> of file <a class="el" href="a04696.html">vtkImageFFT.h</a>.</p>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="99fd2b9686296dea31d46ab1f187c2a7"></a><!-- doxytag: member="vtkImageFFT::vtkImageFFT" ref="99fd2b9686296dea31d46ab1f187c2a7" args="()" -->
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<td class="memname">vtkImageFFT::vtkImageFFT </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [inline, protected]</code></td>
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<p>Definition at line <a class="el" href="a04696.html#l00056">56</a> of file <a class="el" href="a04696.html">vtkImageFFT.h</a>.</p>
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<a class="anchor" name="82f0baae7d05bc1378b2d0ed8480593d"></a><!-- doxytag: member="vtkImageFFT::~vtkImageFFT" ref="82f0baae7d05bc1378b2d0ed8480593d" args="()" -->
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<td class="memname">vtkImageFFT::~vtkImageFFT </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [inline, protected]</code></td>
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<p>Definition at line <a class="el" href="a04696.html#l00057">57</a> of file <a class="el" href="a04696.html">vtkImageFFT.h</a>.</p>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="83dda599031b426ff15d3190ad006411"></a><!-- doxytag: member="vtkImageFFT::New" ref="83dda599031b426ff15d3190ad006411" args="()" -->
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<td class="memname">static <a class="el" href="a00764.html">vtkImageFFT</a>* vtkImageFFT::New </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
<p>Reimplemented from <a class="el" href="a00101.html#06d80d8d4aa1a4856135fa003845be82">vtkAlgorithm</a>.</p>
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<a class="anchor" name="9e1f4c87cd3cb3a202ef4da347d44055"></a><!-- doxytag: member="vtkImageFFT::GetClassName" ref="9e1f4c87cd3cb3a202ef4da347d44055" args="()" -->
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<td class="memname">virtual const char* vtkImageFFT::GetClassName </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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Construct an instance of <a class="el" href="a00754.html" title="Filters that execute axes in series.">vtkImageDecomposeFilter</a> filter with default dimensionality 3.
<p>Reimplemented from <a class="el" href="a00767.html#706f06601a2bbbe9c72e6ed0dd5df948">vtkImageFourierFilter</a>.</p>
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<a class="anchor" name="da418e3cc64724cb7703bbf7ca505a79"></a><!-- doxytag: member="vtkImageFFT::IsTypeOf" ref="da418e3cc64724cb7703bbf7ca505a79" args="(const char *type)" -->
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<td class="memname">static int vtkImageFFT::IsTypeOf </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>type</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Construct an instance of <a class="el" href="a00754.html" title="Filters that execute axes in series.">vtkImageDecomposeFilter</a> filter with default dimensionality 3.
<p>Reimplemented from <a class="el" href="a00767.html#1febbf6971c144f72c85136eafc487bd">vtkImageFourierFilter</a>.</p>
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<a class="anchor" name="61e00f3765d7b5a1f531f1061a4458d3"></a><!-- doxytag: member="vtkImageFFT::IsA" ref="61e00f3765d7b5a1f531f1061a4458d3" args="(const char *type)" -->
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<td class="memname">virtual int vtkImageFFT::IsA </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>type</em> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<p>
Construct an instance of <a class="el" href="a00754.html" title="Filters that execute axes in series.">vtkImageDecomposeFilter</a> filter with default dimensionality 3.
<p>Reimplemented from <a class="el" href="a00767.html#43a761e6bc66392b02ee364900fc9ae9">vtkImageFourierFilter</a>.</p>
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<a class="anchor" name="44c1f7d231d1cd15427c688d27d325f9"></a><!-- doxytag: member="vtkImageFFT::SafeDownCast" ref="44c1f7d231d1cd15427c688d27d325f9" args="(vtkObject *o)" -->
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<td class="memname">static <a class="el" href="a00764.html">vtkImageFFT</a>* vtkImageFFT::SafeDownCast </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a01084.html">vtkObject</a> * </td>
<td class="paramname"> <em>o</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Construct an instance of <a class="el" href="a00754.html" title="Filters that execute axes in series.">vtkImageDecomposeFilter</a> filter with default dimensionality 3.
<p>Reimplemented from <a class="el" href="a00767.html#3d3fcab771c1e7c2a721d6db90cbd5ad">vtkImageFourierFilter</a>.</p>
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<a class="anchor" name="a8763d6d9326392a5aeea5e17fc0871a"></a><!-- doxytag: member="vtkImageFFT::SplitExtent" ref="a8763d6d9326392a5aeea5e17fc0871a" args="(int splitExt[6], int startExt[6], int num, int total)" -->
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<td class="memname">int vtkImageFFT::SplitExtent </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>splitExt</em>[6], </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>startExt</em>[6], </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>num</em>, </td>
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<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>total</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
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<p>
Used internally for streaming and threads. Splits output update extent into num pieces. This method needs to be called num times. Results must not overlap for consistent starting extent. Subclass can override this method. This method returns the number of pieces resulting from a successful split. This can be from 1 to "total". If 1 is returned, the extent cannot be split.
<p>Reimplemented from <a class="el" href="a01705.html#b15aeb7ab76b22b9e780b213efd20265">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="6cb2417b46230b260b2c9650e57a1e44"></a><!-- doxytag: member="vtkImageFFT::IterativeRequestInformation" ref="6cb2417b46230b260b2c9650e57a1e44" args="(vtkInformation *in, vtkInformation *out)" -->
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<td class="memname">virtual int vtkImageFFT::IterativeRequestInformation </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>in</em>, </td>
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<td></td>
<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>out</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [protected, virtual]</code></td>
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<p>
<p>Reimplemented from <a class="el" href="a00782.html#d983b309e9531205ed825e1edd0efc3e">vtkImageIterateFilter</a>.</p>
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</div><p>
<a class="anchor" name="469a59155f2e0ca8563032f700d145e9"></a><!-- doxytag: member="vtkImageFFT::IterativeRequestUpdateExtent" ref="469a59155f2e0ca8563032f700d145e9" args="(vtkInformation *in, vtkInformation *out)" -->
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<td class="memname">virtual int vtkImageFFT::IterativeRequestUpdateExtent </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>in</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>out</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [protected, virtual]</code></td>
</tr>
</table>
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<div class="memdoc">
<p>
<p>Reimplemented from <a class="el" href="a00782.html#e39cb15d7b8f1e565a8b7cb21c0e3ee6">vtkImageIterateFilter</a>.</p>
</div>
</div><p>
<a class="anchor" name="108cedc16dd7a6ec8033925e061cc4da"></a><!-- doxytag: member="vtkImageFFT::ThreadedExecute" ref="108cedc16dd7a6ec8033925e061cc4da" args="(vtkImageData *inData, vtkImageData *outData, int outExt[6], int threadId)" -->
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<td class="memname">void vtkImageFFT::ThreadedExecute </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00751.html">vtkImageData</a> * </td>
<td class="paramname"> <em>inData</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00751.html">vtkImageData</a> * </td>
<td class="paramname"> <em>outData</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>outExt</em>[6], </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>threadId</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [protected, virtual]</code></td>
</tr>
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</div>
<div class="memdoc">
<p>
<p>Reimplemented from <a class="el" href="a01705.html#6ba90d6d9626db478151ebf7d940122c">vtkThreadedImageAlgorithm</a>.</p>
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</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li>dox/Imaging/<a class="el" href="a04696.html">vtkImageFFT.h</a></ul>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:09:20 2009 for VTK by
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