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Don't use the threshold filter. The output of the threshold filter is
UnstructuredGrid, which will cause your compact imagedata to balloon in
memory size by an enormous amount if the non-zero region is larger than
a small amount.<br>
<br>
There is no existing filter which will search for the good cropping
region for you, but if you write some code<br>
Loop x, loopy, loop z, find the min/max extents that are non zero, then
set the extents into a VOI. You can easily make a new filter which
wraps the ExtractVOI and a bounds check into a new
vtkImageExtractNonZeroVOIFilter<br>
<br>
JB<br>
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<blockquote
cite="mid:b227a7f80810150503q2b6c866s5d873ea6850b58b0@mail.gmail.com"
type="cite">
<pre wrap="">Hello!
On Wed, Oct 15, 2008 at 1:35 PM, Fabio Meneghini
<a class="moz-txt-link-rfc2396E" href="mailto:fab.meneghini@gmail.com"><fab.meneghini@gmail.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Is there any method to automatically crop out the zeros
</pre>
</blockquote>
<pre wrap=""><!---->
The Threshold-filter may help here:
<a class="moz-txt-link-rfc2396E" href="http://www.vtk.org/doc/nightly/html/classvtkThreshold.html"><http://www.vtk.org/doc/nightly/html/classvtkThreshold.html></a>
hth
mirko
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<pre class="moz-signature" cols="78">--
John Biddiscombe, email:biddisco @ cscs.ch
<a class="moz-txt-link-freetext" href="http://www.cscs.ch/">http://www.cscs.ch/</a>
CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82</pre>
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