<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks for your reply! I'm not having any trouble reading the original unstructured points as an image, but I didn't see why the data type was getting switched to an unstructured grid. <div><br></div><div>Now I've realize this was done by ExtractCellsByRegion, which makes sense. I switched to Extract Subset, which outputs structured points, and this works just fine. However, the ROI selection is pretty limited since it only allows the selection using a cube, from what I can tell. I've also tried Extract Selection, but Paraview crashes each time I try to use the selection tools. </div><div><br></div><div>Any tips on a better way to do this would be appreciated!</div><div><br></div><div>Sara</div><div><br></div><div><br><div><div><div>On Sep 21, 2010, at 1:12 PM, Moreland, Kenneth wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div> <font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt">VTK has a data type called structured grid that is different than image data (and also different than unstructured grid). If ParaView is not telling you that your data is image data or a uniform grid, then the data you write out will be necessarily incompatible with reading it as an image file.<br> <br> -Ken<br> <br> <br> On 9/21/10 11:55 AM, "Sara Rolfe" <<a href="smrolfe@u.washington.edu">smrolfe@u.washington.edu</a>> wrote:<br> <br> </span></font><blockquote><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size:11pt">Hello,<br> <br> I'm new to Paraview and am trying to use it to edit a VTK image. My <br> original image is in the structured points format. I'm using the <br> ExtractCellsByRegion filter to select a subset, which I save using <br> Save Data with a VTK extension like the original. However, I could <br> not open this file using the ITK ImageFileReader. I believe this is <br> because the VTK file was saved as an unstructured grid instead of <br> structured points.<br> <br> Does anyone know why this is happening and how to change it? I can <br> look at converting it using ITK, but I'd like to know if there's a <br> better solution.<br> <br> Thanks,<br> Sara<br> <br> _______________________________________________<br> Powered by <a href="http://www.kitware.com">www.kitware.com</a><br> <br> Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><br> <br> Please keep messages on-topic and check the ParaView Wiki at: <a href="http://paraview.org/Wiki/ParaView">http://paraview.org/Wiki/ParaView</a><br> <br> Follow this link to subscribe/unsubscribe:<br> <a href="http://www.paraview.org/mailman/listinfo/paraview">http://www.paraview.org/mailman/listinfo/paraview</a><br> <br> <br> </span></font></blockquote> </div> </blockquote></div><br></div></div></body></html>