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<h1>vtkImageGradient Class Reference</h1><!-- doxytag: class="vtkImageGradient" --><!-- doxytag: inherits="vtkThreadedImageAlgorithm" --><code>#include <<a class="el" href="a04702.html">vtkImageGradient.h</a>></code>
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Inheritance diagram for vtkImageGradient:</div>
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<p><center><img src="a10888.png" border="0" usemap="#a10889" alt="Inheritance graph"></center>
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
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Collaboration diagram for vtkImageGradient:</div>
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<p><center><img src="a10890.png" border="0" usemap="#a10891" alt="Collaboration graph"></center>
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<a href="a10892.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Computes the gradient vector.
<p>
<a class="el" href="a00770.html" title="Computes the gradient vector.">vtkImageGradient</a> computes the gradient vector of an image. The vector results are stored as scalar components. The Dimensionality determines whether to perform a 2d or 3d gradient. The default is two dimensional XY gradient. OutputScalarType is always double. Gradient is computed using central differences.<p>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_8.html#c2_vtk_t_vtkImageGradient">vtkImageGradient (Tests)</a> </dd></dl>
<p>Definition at line <a class="el" href="a04702.html#l00033">33</a> of file <a class="el" href="a04702.html">vtkImageGradient.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="a01705.html">vtkThreadedImageAlgorithm</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#925795f990641208c3c482c8f20a4059">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="a00770.html#4aa200ef0f1842529d804f5178ac39f3">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="a00770.html#7f782a961145f2843535aae50825d747">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="a00770.html#59133d35c0f90f9bb21ab5db6e6225b4">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="a00770.html#139b6ea69b94f2d4a2be7ddb7fc44845">SetDimensionality</a> (int)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#3a1fb8f182e7eaeec061927845807c46">GetDimensionality</a> ()</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="a00770.html#169f82b887b376dc68642ea1be2acb00">SetHandleBoundaries</a> (int)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#0f38f2e0badbb76d4dd034a2cc3478f5">GetHandleBoundaries</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#d253d74ea9f0cb376c7226ae1d80d6e8">HandleBoundariesOn</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#7b12ecaebb099dde6507b38e587c4498">HandleBoundariesOff</a> ()</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="a00770.html">vtkImageGradient</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#40840fef48ecdaa7b8c0d8a6843e91f8">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="a00770.html#e9b422b2b49869b217b21bc63a66130e">IsTypeOf</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00770.html">vtkImageGradient</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#27eaee0f31b693a85e09b33f1819e38a">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="a00770.html#b6c73624dfb7f89819aae413bb60048b">vtkImageGradient</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#792c51c91d60812632f95f73d7d6bda6">~vtkImageGradient</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#24d997064c048eb6732828699e60250f">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="a00770.html#47eacf366fc1a5c99cd0f69fc20120f0">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="a00770.html#6715cfc2dcbadcad5b1f7fa9d5aef4b3">RequestData</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">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#0549662fe2030e969c1e6a10a821b743">ThreadedRequestData</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> *, <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>
<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="a00770.html#d73b559db1115dcfe6744f488f4183a2">HandleBoundaries</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00770.html#ed7dde58c7d1f84d0a98f5d6517ffad1">Dimensionality</a></td></tr>
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<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="925795f990641208c3c482c8f20a4059"></a><!-- doxytag: member="vtkImageGradient::Superclass" ref="925795f990641208c3c482c8f20a4059" args="" -->
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<td class="memname">typedef <a class="el" href="a01705.html">vtkThreadedImageAlgorithm</a> <a class="el" href="a01705.html">vtkImageGradient::Superclass</a> </td>
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<p>Reimplemented from <a class="el" href="a01705.html#67876177e53dbc18f91b9b50f8f03331">vtkThreadedImageAlgorithm</a>.</p>
<p>Definition at line <a class="el" href="a04702.html#l00037">37</a> of file <a class="el" href="a04702.html">vtkImageGradient.h</a>.</p>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="b6c73624dfb7f89819aae413bb60048b"></a><!-- doxytag: member="vtkImageGradient::vtkImageGradient" ref="b6c73624dfb7f89819aae413bb60048b" args="()" -->
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<td class="memname">vtkImageGradient::vtkImageGradient </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [protected]</code></td>
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<a class="anchor" name="792c51c91d60812632f95f73d7d6bda6"></a><!-- doxytag: member="vtkImageGradient::~vtkImageGradient" ref="792c51c91d60812632f95f73d7d6bda6" args="()" -->
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<td class="memname">vtkImageGradient::~vtkImageGradient </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="a04702.html#l00058">58</a> of file <a class="el" href="a04702.html">vtkImageGradient.h</a>.</p>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="40840fef48ecdaa7b8c0d8a6843e91f8"></a><!-- doxytag: member="vtkImageGradient::New" ref="40840fef48ecdaa7b8c0d8a6843e91f8" args="()" -->
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<td class="memname">static <a class="el" href="a00770.html">vtkImageGradient</a>* vtkImageGradient::New </td>
<td>(</td>
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<td> ) </td>
<td><code> [static]</code></td>
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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="4aa200ef0f1842529d804f5178ac39f3"></a><!-- doxytag: member="vtkImageGradient::GetClassName" ref="4aa200ef0f1842529d804f5178ac39f3" args="()" -->
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<td class="memname">virtual const char* vtkImageGradient::GetClassName </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<p>Reimplemented from <a class="el" href="a01705.html#8622c920af18a6521f427d7b70613faa">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="e9b422b2b49869b217b21bc63a66130e"></a><!-- doxytag: member="vtkImageGradient::IsTypeOf" ref="e9b422b2b49869b217b21bc63a66130e" args="(const char *type)" -->
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<td class="memname">static int vtkImageGradient::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="a01705.html#1e20b0feec3712e39d352e47d582ff4e">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="7f782a961145f2843535aae50825d747"></a><!-- doxytag: member="vtkImageGradient::IsA" ref="7f782a961145f2843535aae50825d747" args="(const char *type)" -->
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<td class="memname">virtual int vtkImageGradient::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="a01705.html#250ac29fa902a270b6f94702f7f24e9b">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="27eaee0f31b693a85e09b33f1819e38a"></a><!-- doxytag: member="vtkImageGradient::SafeDownCast" ref="27eaee0f31b693a85e09b33f1819e38a" args="(vtkObject *o)" -->
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<td class="memname">static <a class="el" href="a00770.html">vtkImageGradient</a>* vtkImageGradient::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="a01705.html#def8b2b0abda015b495884db6f717625">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="59133d35c0f90f9bb21ab5db6e6225b4"></a><!-- doxytag: member="vtkImageGradient::PrintSelf" ref="59133d35c0f90f9bb21ab5db6e6225b4" args="(ostream &os, vtkIndent indent)" -->
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<td class="memname">void vtkImageGradient::PrintSelf </td>
<td>(</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="a01705.html#53dc14a03ab6cffae0ca5cadb2c6d172">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="139b6ea69b94f2d4a2be7ddb7fc44845"></a><!-- doxytag: member="vtkImageGradient::SetDimensionality" ref="139b6ea69b94f2d4a2be7ddb7fc44845" args="(int)" -->
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<td class="memname">virtual void vtkImageGradient::SetDimensionality </td>
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Determines how the input is interpreted (set of 2d slices ...)
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<a class="anchor" name="3a1fb8f182e7eaeec061927845807c46"></a><!-- doxytag: member="vtkImageGradient::GetDimensionality" ref="3a1fb8f182e7eaeec061927845807c46" args="()" -->
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<td class="memname">virtual int vtkImageGradient::GetDimensionality </td>
<td>(</td>
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<td> ) </td>
<td><code> [virtual]</code></td>
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Determines how the input is interpreted (set of 2d slices ...)
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<a class="anchor" name="169f82b887b376dc68642ea1be2acb00"></a><!-- doxytag: member="vtkImageGradient::SetHandleBoundaries" ref="169f82b887b376dc68642ea1be2acb00" args="(int)" -->
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<td class="memname">virtual void vtkImageGradient::SetHandleBoundaries </td>
<td>(</td>
<td class="paramtype">int </td>
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<td><code> [virtual]</code></td>
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Get/Set whether to handle boundaries. If enabled, boundary pixels are treated as duplicated so that central differencing works for the boundary pixels. If disabled, the output whole extent of the image is reduced by one pixel.
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<a class="anchor" name="0f38f2e0badbb76d4dd034a2cc3478f5"></a><!-- doxytag: member="vtkImageGradient::GetHandleBoundaries" ref="0f38f2e0badbb76d4dd034a2cc3478f5" args="()" -->
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<td class="memname">virtual int vtkImageGradient::GetHandleBoundaries </td>
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Get/Set whether to handle boundaries. If enabled, boundary pixels are treated as duplicated so that central differencing works for the boundary pixels. If disabled, the output whole extent of the image is reduced by one pixel.
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<a class="anchor" name="d253d74ea9f0cb376c7226ae1d80d6e8"></a><!-- doxytag: member="vtkImageGradient::HandleBoundariesOn" ref="d253d74ea9f0cb376c7226ae1d80d6e8" args="()" -->
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<td class="memname">virtual void vtkImageGradient::HandleBoundariesOn </td>
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<td><code> [virtual]</code></td>
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Get/Set whether to handle boundaries. If enabled, boundary pixels are treated as duplicated so that central differencing works for the boundary pixels. If disabled, the output whole extent of the image is reduced by one pixel.
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<a class="anchor" name="7b12ecaebb099dde6507b38e587c4498"></a><!-- doxytag: member="vtkImageGradient::HandleBoundariesOff" ref="7b12ecaebb099dde6507b38e587c4498" args="()" -->
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<td class="memname">virtual void vtkImageGradient::HandleBoundariesOff </td>
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<td><code> [virtual]</code></td>
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Get/Set whether to handle boundaries. If enabled, boundary pixels are treated as duplicated so that central differencing works for the boundary pixels. If disabled, the output whole extent of the image is reduced by one pixel.
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<a class="anchor" name="24d997064c048eb6732828699e60250f"></a><!-- doxytag: member="vtkImageGradient::RequestInformation" ref="24d997064c048eb6732828699e60250f" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<td class="memname">virtual int vtkImageGradient::RequestInformation </td>
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<p>Reimplemented from <a class="el" href="a00727.html#b739abd84881f7e31a8a382bf5a06a91">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="47eacf366fc1a5c99cd0f69fc20120f0"></a><!-- doxytag: member="vtkImageGradient::RequestUpdateExtent" ref="47eacf366fc1a5c99cd0f69fc20120f0" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<td class="memname">virtual int vtkImageGradient::RequestUpdateExtent </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="6715cfc2dcbadcad5b1f7fa9d5aef4b3"></a><!-- doxytag: member="vtkImageGradient::RequestData" ref="6715cfc2dcbadcad5b1f7fa9d5aef4b3" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<td class="memname">virtual int vtkImageGradient::RequestData </td>
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<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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This is called by the superclass. This is the method you should override.
<p>Reimplemented from <a class="el" href="a01705.html#cb47f24e52706df6a7d2ded8266d2b23">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="0549662fe2030e969c1e6a10a821b743"></a><!-- doxytag: member="vtkImageGradient::ThreadedRequestData" ref="0549662fe2030e969c1e6a10a821b743" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *, vtkImageData ***inData, vtkImageData **outData, int outExt[6], int threadId)" -->
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<td class="memname">void vtkImageGradient::ThreadedRequestData </td>
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<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>
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<td class="paramkey"></td>
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<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="paramtype"><a class="el" href="a00751.html">vtkImageData</a> ** </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>extent</em>[6], </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>threadId</em></td><td> </td>
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If the subclass does not define an Execute method, then the task will be broken up, multiple threads will be spawned, and each thread will call this method. It is public so that the thread functions can call this method.
<p>Reimplemented from <a class="el" href="a01705.html#dda52b8ad4b703ee11c76b916accbb42">vtkThreadedImageAlgorithm</a>.</p>
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="d73b559db1115dcfe6744f488f4183a2"></a><!-- doxytag: member="vtkImageGradient::HandleBoundaries" ref="d73b559db1115dcfe6744f488f4183a2" args="" -->
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<td class="memname">int <a class="el" href="a00770.html#d73b559db1115dcfe6744f488f4183a2">vtkImageGradient::HandleBoundaries</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04702.html#l00058">58</a> of file <a class="el" href="a04702.html">vtkImageGradient.h</a>.</p>
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<a class="anchor" name="ed7dde58c7d1f84d0a98f5d6517ffad1"></a><!-- doxytag: member="vtkImageGradient::Dimensionality" ref="ed7dde58c7d1f84d0a98f5d6517ffad1" args="" -->
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<td class="memname">int <a class="el" href="a00770.html#ed7dde58c7d1f84d0a98f5d6517ffad1">vtkImageGradient::Dimensionality</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04702.html#l00061">61</a> of file <a class="el" href="a04702.html">vtkImageGradient.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="a04702.html">vtkImageGradient.h</a></ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:09:33 2009 for VTK by
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