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Richard, thank you for your answer. I successfully run the algorithms
the itkFlatStructuringElement in 4D, using a ball as the structuring
element.<br>
Now, I would like to implement a ball which has, in the 4th
coordinate(time), all pixels from the center to the past time pixels
equals to zero and the rest part of them equal to 1 (like a
semi-ellipsis in the 4th dimension) . Basically, what I would like to
avoid is the symmetry of the dilatation, making it asymmetric. Is it
possible to implement it with the HISTO algorithm?, where is exactly
this algorithm?, I couldn't find it in
<a class="moz-txt-link-freetext" href="http://voxel.jouy.inra.fr/darcs/contrib-itk/consolidatedMorphology/">http://voxel.jouy.inra.fr/darcs/contrib-itk/consolidatedMorphology/</a> .<br>
<br>
Best regards and thank you for your help<br>
Irene<br>
<br>
Richard Beare wrote:
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cite="mid779dabeb0803261407s7c1a9ae9ye16b51eb15ec3846@mail.gmail.com"
type="cite">
<pre wrap="">Hi,
You could experiment with the consolidatedMorphology module from the
insightjournal. We haven't experimented with 4D images, but I'd like
to get it working on them. In theory they should work. This
implementation will be the best way to go if you want larger
structuring elements because it uses more efficient algorithms than
the default. The two safest options will be the "Box" structuring
element using VHGW algorithm or Ball using HISTO.
On Thu, Mar 27, 2008 at 7:00 AM, Irene Gonzálvez
<a class="moz-txt-link-rfc2396E" href="mailto:irenegonzalvezg@gmail.com"><irenegonzalvezg@gmail.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Dear Luis and all ITK-users,
I am trying to make and erosion and dilation in 4D. First of all, I did in
2D following one of the examples you provide us, but I could observe that
the BallStructuringElement is a 3x3 structuring element, in 2D. I checked
some previous mails (year 2006) and in an answer you gave to someone you
said that it wasn't implemented, but pobably now it has already done. Is it
ok? In case it wasn't, I will implement it and I would like to know if I can
send you the class to contribute with ITK.
Thanks in advance
Best regards
Irene
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