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<h1>vtkExtractVOI Class Reference</h1><!-- doxytag: class="vtkExtractVOI" --><!-- doxytag: inherits="vtkImageAlgorithm" --><code>#include <<a class="el" href="a04660.html">vtkExtractVOI.h</a>></code>
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Inheritance diagram for vtkExtractVOI:</div>
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Collaboration diagram for vtkExtractVOI:</div>
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<p><center><img src="a09760.png" border="0" usemap="#a09761" alt="Collaboration graph"></center>
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<a href="a09762.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
select piece (e.g., volume of interest) and/or subsample structured points dataset
<p>
<a class="el" href="a00527.html" title="select piece (e.g., volume of interest) and/or subsample structured points dataset...">vtkExtractVOI</a> is a filter that selects a portion of an input structured points dataset, or subsamples an input dataset. (The selected portion of interested is referred to as the Volume Of Interest, or VOI.) The output of this filter is a structured points dataset. The filter treats input data of any topological dimension (i.e., point, line, image, or volume) and can generate output data of any topological dimension.<p>
To use this filter set the VOI ivar which are i-j-k min/max indices that specify a rectangular region in the data. (Note that these are 0-offset.) You can also specify a sampling rate to subsample the data.<p>
Typical applications of this filter are to extract a slice from a volume for image processing, subsampling large volumes to reduce data size, or extracting regions of a volume with interesting data.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="a00628.html" title="extract geometry from data (or convert data to polygonal type)">vtkGeometryFilter</a> <a class="el" href="a00505.html" title="extract cells that lie either entirely inside or outside of a specified implicit...">vtkExtractGeometry</a> <a class="el" href="a00506.html" title="select piece (e.g., volume of interest) and/or subsample structured grid dataset">vtkExtractGrid</a></dd></dl>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_5.html#c2_vtk_t_vtkExtractVOI">vtkExtractVOI (Tests)</a> </dd></dl>
<p>Definition at line <a class="el" href="a04660.html#l00046">46</a> of file <a class="el" href="a04660.html">vtkExtractVOI.h</a>.</p>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="a00727.html">vtkImageAlgorithm</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#abfaceb0ee970f3b62bc865462d46b9a">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="a00527.html#ffe1449a0303d9dfb5bf7c3ff847db9b">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="a00527.html#e7549f5d5d1b060e0fa84eaa50150b7e">IsA</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#8ae28102cb34208d18dfbaab1c0ebed1">PrintSelf</a> (ostream &os, <a class="el" href="a00869.html">vtkIndent</a> indent)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#4841cd78f0a35aef26d671e98ee4c700">SetVOI</a> (int, int, int, int, int, int)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#363c6a57ae65ab2bad1d93b273c812d8">SetVOI</a> (int[6])</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#56ab61ccc0b120e0aa7bcc925e8e5b17">GetVOI</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#9414f07c951637833844c9bcf95ab20f">GetVOI</a> (int data[6])</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#c4867a1e870978f58d8f4ddf98dfc6b5">SetSampleRate</a> (int, int, int)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#a1c6496714ad289e9754a72efd56e064">SetSampleRate</a> (int[3])</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#378d80b650b086014d2ce2f6a4ac8136">GetSampleRate</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#00eeff7735ced967408f9e499e89ce62">GetSampleRate</a> (int data[3])</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 int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#1c480d7231665b4d86cb33750c1120db">IsTypeOf</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00527.html">vtkExtractVOI</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#85610b7c6999148cdb01d730dd2536b9">SafeDownCast</a> (<a class="el" href="a01084.html">vtkObject</a> *o)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00527.html">vtkExtractVOI</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#d18eb44e82d6256658bf4b4ee3ea662d">New</a> ()</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="a00527.html#1602d4f02e4309f2605517bdddc76540">vtkExtractVOI</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#8520fcbce2d2c30d9431d15c90d404ee">~vtkExtractVOI</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#b7bb7da1de24e83bc94d03037badb2d7">RequestUpdateExtent</a> (<a class="el" href="a00872.html">vtkInformation</a> *, <a class="el" href="a00895.html">vtkInformationVector</a> **, <a class="el" href="a00895.html">vtkInformationVector</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#d27273157ec46fe5ea42ed02dcca8374">RequestInformation</a> (<a class="el" href="a00872.html">vtkInformation</a> *, <a class="el" href="a00895.html">vtkInformationVector</a> **, <a class="el" href="a00895.html">vtkInformationVector</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#7e26f19dca0bcb1b7bdd442b5501469f">RequestData</a> (<a class="el" href="a00872.html">vtkInformation</a> *request, <a class="el" href="a00895.html">vtkInformationVector</a> **inputVector, <a class="el" href="a00895.html">vtkInformationVector</a> *outputVector)</td></tr>
<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#de2cc58e8b8ae03c3bc8bc79963caa21">VOI</a> [6]</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00527.html#8f4a9a464317111da6b89e04f38525d3">SampleRate</a> [3]</td></tr>
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<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="abfaceb0ee970f3b62bc865462d46b9a"></a><!-- doxytag: member="vtkExtractVOI::Superclass" ref="abfaceb0ee970f3b62bc865462d46b9a" args="" -->
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<td class="memname">typedef <a class="el" href="a00727.html">vtkImageAlgorithm</a> <a class="el" href="a00727.html">vtkExtractVOI::Superclass</a> </td>
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<p>Reimplemented from <a class="el" href="a00727.html#4886a2bada7e61a8f7767bea0e68cb21">vtkImageAlgorithm</a>.</p>
<p>Definition at line <a class="el" href="a04660.html#l00049">49</a> of file <a class="el" href="a04660.html">vtkExtractVOI.h</a>.</p>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="1602d4f02e4309f2605517bdddc76540"></a><!-- doxytag: member="vtkExtractVOI::vtkExtractVOI" ref="1602d4f02e4309f2605517bdddc76540" args="()" -->
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<td class="memname">vtkExtractVOI::vtkExtractVOI </td>
<td>(</td>
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<td><code> [protected]</code></td>
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<a class="anchor" name="8520fcbce2d2c30d9431d15c90d404ee"></a><!-- doxytag: member="vtkExtractVOI::~vtkExtractVOI" ref="8520fcbce2d2c30d9431d15c90d404ee" args="()" -->
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<td class="memname">vtkExtractVOI::~vtkExtractVOI </td>
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<td><code> [inline, protected]</code></td>
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<p>Definition at line <a class="el" href="a04660.html#l00074">74</a> of file <a class="el" href="a04660.html">vtkExtractVOI.h</a>.</p>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="ffe1449a0303d9dfb5bf7c3ff847db9b"></a><!-- doxytag: member="vtkExtractVOI::GetClassName" ref="ffe1449a0303d9dfb5bf7c3ff847db9b" args="()" -->
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<td class="memname">virtual const char* vtkExtractVOI::GetClassName </td>
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<td><code> [virtual]</code></td>
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<p>Reimplemented from <a class="el" href="a00727.html#91c28cada9653fbb3c9d281eb611fdfa">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="1c480d7231665b4d86cb33750c1120db"></a><!-- doxytag: member="vtkExtractVOI::IsTypeOf" ref="1c480d7231665b4d86cb33750c1120db" args="(const char *type)" -->
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<td class="memname">static int vtkExtractVOI::IsTypeOf </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
<p>Reimplemented from <a class="el" href="a00727.html#27cee08eda0b22134811f84ef44d269d">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="e7549f5d5d1b060e0fa84eaa50150b7e"></a><!-- doxytag: member="vtkExtractVOI::IsA" ref="e7549f5d5d1b060e0fa84eaa50150b7e" args="(const char *type)" -->
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<td class="memname">virtual int vtkExtractVOI::IsA </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
<p>Reimplemented from <a class="el" href="a00727.html#572ad8603a8e0e66eb95362fc3c7f970">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="85610b7c6999148cdb01d730dd2536b9"></a><!-- doxytag: member="vtkExtractVOI::SafeDownCast" ref="85610b7c6999148cdb01d730dd2536b9" args="(vtkObject *o)" -->
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<td class="memname">static <a class="el" href="a00527.html">vtkExtractVOI</a>* vtkExtractVOI::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>Reimplemented from <a class="el" href="a00727.html#e069fec1c9cac59188001ad8493945a4">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="8ae28102cb34208d18dfbaab1c0ebed1"></a><!-- doxytag: member="vtkExtractVOI::PrintSelf" ref="8ae28102cb34208d18dfbaab1c0ebed1" args="(ostream &os, vtkIndent indent)" -->
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<td class="memname">void vtkExtractVOI::PrintSelf </td>
<td>(</td>
<td class="paramtype">ostream & </td>
<td class="paramname"> <em>os</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00869.html">vtkIndent</a> </td>
<td class="paramname"> <em>indent</em></td><td> </td>
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Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use <a class="el" href="a01085.html#edadf6378465fd81c2592ef64262e2a5">Print()</a> instead) but used in the hierarchical print process to combine the output of several classes.
<p>Reimplemented from <a class="el" href="a00727.html#24f67bbfad1ac731eb64f5172cf30af3">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="d18eb44e82d6256658bf4b4ee3ea662d"></a><!-- doxytag: member="vtkExtractVOI::New" ref="d18eb44e82d6256658bf4b4ee3ea662d" args="()" -->
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<td class="memname">static <a class="el" href="a00527.html">vtkExtractVOI</a>* vtkExtractVOI::New </td>
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Construct object to extract all of the input data.
<p>Reimplemented from <a class="el" href="a00101.html#06d80d8d4aa1a4856135fa003845be82">vtkAlgorithm</a>.</p>
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<a class="anchor" name="4841cd78f0a35aef26d671e98ee4c700"></a><!-- doxytag: member="vtkExtractVOI::SetVOI" ref="4841cd78f0a35aef26d671e98ee4c700" args="(int, int, int, int, int, int)" -->
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<td class="memname">virtual void vtkExtractVOI::SetVOI </td>
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Specify i-j-k (min,max) pairs to extract. The resulting structured points dataset can be of any topological dimension (i.e., point, line, image, or volume).
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<a class="anchor" name="363c6a57ae65ab2bad1d93b273c812d8"></a><!-- doxytag: member="vtkExtractVOI::SetVOI" ref="363c6a57ae65ab2bad1d93b273c812d8" args="(int[6])" -->
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<td class="memname">virtual void vtkExtractVOI::SetVOI </td>
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<td class="paramname">[6] </td>
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<td><code> [virtual]</code></td>
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Specify i-j-k (min,max) pairs to extract. The resulting structured points dataset can be of any topological dimension (i.e., point, line, image, or volume).
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<a class="anchor" name="56ab61ccc0b120e0aa7bcc925e8e5b17"></a><!-- doxytag: member="vtkExtractVOI::GetVOI" ref="56ab61ccc0b120e0aa7bcc925e8e5b17" args="()" -->
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<td class="memname">virtual int* vtkExtractVOI::GetVOI </td>
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<td><code> [virtual]</code></td>
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Specify i-j-k (min,max) pairs to extract. The resulting structured points dataset can be of any topological dimension (i.e., point, line, image, or volume).
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<a class="anchor" name="9414f07c951637833844c9bcf95ab20f"></a><!-- doxytag: member="vtkExtractVOI::GetVOI" ref="9414f07c951637833844c9bcf95ab20f" args="(int data[6])" -->
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<td class="memname">virtual void vtkExtractVOI::GetVOI </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>data</em>[6] </td>
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<td><code> [virtual]</code></td>
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<p>
Specify i-j-k (min,max) pairs to extract. The resulting structured points dataset can be of any topological dimension (i.e., point, line, image, or volume).
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<a class="anchor" name="c4867a1e870978f58d8f4ddf98dfc6b5"></a><!-- doxytag: member="vtkExtractVOI::SetSampleRate" ref="c4867a1e870978f58d8f4ddf98dfc6b5" args="(int, int, int)" -->
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<td class="memname">virtual void vtkExtractVOI::SetSampleRate </td>
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<td class="paramtype">int </td>
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<td class="paramtype">int </td>
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Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.
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<a class="anchor" name="a1c6496714ad289e9754a72efd56e064"></a><!-- doxytag: member="vtkExtractVOI::SetSampleRate" ref="a1c6496714ad289e9754a72efd56e064" args="(int[3])" -->
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<td class="memname">virtual void vtkExtractVOI::SetSampleRate </td>
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<td><code> [virtual]</code></td>
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Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.
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<a class="anchor" name="378d80b650b086014d2ce2f6a4ac8136"></a><!-- doxytag: member="vtkExtractVOI::GetSampleRate" ref="378d80b650b086014d2ce2f6a4ac8136" args="()" -->
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<td class="memname">virtual int* vtkExtractVOI::GetSampleRate </td>
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<td><code> [virtual]</code></td>
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<p>
Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.
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<a class="anchor" name="00eeff7735ced967408f9e499e89ce62"></a><!-- doxytag: member="vtkExtractVOI::GetSampleRate" ref="00eeff7735ced967408f9e499e89ce62" args="(int data[3])" -->
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<td class="memname">virtual void vtkExtractVOI::GetSampleRate </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>data</em>[3] </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<p>
Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.
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<a class="anchor" name="b7bb7da1de24e83bc94d03037badb2d7"></a><!-- doxytag: member="vtkExtractVOI::RequestUpdateExtent" ref="b7bb7da1de24e83bc94d03037badb2d7" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<td class="memname">virtual int vtkExtractVOI::RequestUpdateExtent </td>
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<td></td><td></td><td><code> [protected, virtual]</code></td>
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<p>Reimplemented from <a class="el" href="a00727.html#442e91c5e549f40acffb0941846cb047">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="d27273157ec46fe5ea42ed02dcca8374"></a><!-- doxytag: member="vtkExtractVOI::RequestInformation" ref="d27273157ec46fe5ea42ed02dcca8374" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<td class="memname">virtual int vtkExtractVOI::RequestInformation </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> ** </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> * </td>
<td class="paramname"></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="a00727.html#b739abd84881f7e31a8a382bf5a06a91">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="7e26f19dca0bcb1b7bdd442b5501469f"></a><!-- doxytag: member="vtkExtractVOI::RequestData" ref="7e26f19dca0bcb1b7bdd442b5501469f" args="(vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)" -->
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<td class="memname">virtual int vtkExtractVOI::RequestData </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>request</em>, </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> ** </td>
<td class="paramname"> <em>inputVector</em>, </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> * </td>
<td class="paramname"> <em>outputVector</em></td><td> </td>
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<td></td><td></td><td><code> [protected, virtual]</code></td>
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This is called by the superclass. This is the method you should override.
<p>Reimplemented from <a class="el" href="a00727.html#ddc9f91ebe9386c31617c3e12166e10e">vtkImageAlgorithm</a>.</p>
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="de2cc58e8b8ae03c3bc8bc79963caa21"></a><!-- doxytag: member="vtkExtractVOI::VOI" ref="de2cc58e8b8ae03c3bc8bc79963caa21" args="[6]" -->
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<td class="memname">int <a class="el" href="a00527.html#de2cc58e8b8ae03c3bc8bc79963caa21">vtkExtractVOI::VOI</a>[6]<code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04660.html#l00086">86</a> of file <a class="el" href="a04660.html">vtkExtractVOI.h</a>.</p>
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<a class="anchor" name="8f4a9a464317111da6b89e04f38525d3"></a><!-- doxytag: member="vtkExtractVOI::SampleRate" ref="8f4a9a464317111da6b89e04f38525d3" args="[3]" -->
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<td class="memname">int <a class="el" href="a00527.html#8f4a9a464317111da6b89e04f38525d3">vtkExtractVOI::SampleRate</a>[3]<code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04660.html#l00087">87</a> of file <a class="el" href="a04660.html">vtkExtractVOI.h</a>.</p>
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<hr>The documentation for this class was generated from the following file:<ul>
<li>dox/Imaging/<a class="el" href="a04660.html">vtkExtractVOI.h</a></ul>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:02:49 2009 for VTK by
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