<div class="gmail_quote">On Wed, Feb 25, 2009 at 11:11 PM, Richard Beare <span dir="ltr"><<a href="mailto:richard.beare@gmail.com">richard.beare@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
I'm trying to track down appropriate vtk data representations for<br>
displaying multiple image data sets in correct relationships to one<br>
another. The source data is MRI slices.<br>
<br>
Does the vtkImageData type have the option of image axes not being<br>
aligned to world coordinates?</blockquote><div><br>no<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Assuming this isn't possible, what is the most appropriate data<br>
structure to use. The approach I'm thinking of is to iterate over the<br>
image in ITK, looking up world coordinates for each voxel, and<br>
building a large vtk data structure that I'd then save in a paraview<br>
compatible format.</blockquote><div><br>We tend to keep the image data in its local (axis aligned) coordinate system. You can manage local to world coordinate system mapping at the actor level by setting a user transform (see SetUserTransform) on the actor visualizing your data. <br>
<br>However, if you are looking to transform the data itself, your only option is to transform the imagedata to polys using vtkImageDataGeometryFilter and then transforming this using vtkTransformPolyDataFilter.<br><br></div>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
Any recommendations?<br>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
</blockquote></div><br><br clear="all"><br>-- <br>Karthik Krishnan<br>R&D Engineer,<br>Kitware Inc.<br>Ph: 518 371 3971 x119<br>Fax: 518 371 3971<br>