<br>Hi Erik,<br><br>A transform that allows for rotation and for anisotropic scaling<br>is indirectly allowing for Skewing (or Shearing).<br><br>In short,<br>it is a transform that does not preserve the angles<br>between two straight lines.<br>
<br><br>In that case, the Affine Transform is what you need.<br><br><br>However, <br>you may want to look at the <br><br> itkScaleSkewVersor3DTransform<br><br><a href="http://public.kitware.com/Insight/Doxygen/html/classitk_1_1ScaleSkewVersor3DTransform.html">http://public.kitware.com/Insight/Doxygen/html/classitk_1_1ScaleSkewVersor3DTransform.html</a><br>
<br><br>Just in case<br>your definition of "shearing" is a bit more specific....<br><br><br><br> Regards,<br><br><br> Luis<br><br><br><br>--------------------------------------------------------------------------------<br>
<div class="gmail_quote">On Fri, Apr 9, 2010 at 10:32 AM, Erik Tuerke <span dir="ltr"><<a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</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>
<br>
Thanks for the reply!<br>
<br>
Unfortunately i can not rely on an isotropic scaling. Sometimes it will be enough, but the best would be to apply an anisotropic scaling.<br>
<br>
cheers<br>
<div><div></div><div class="h5"><br>
----- Original Message -----<br>
From: "Bill Lorensen" <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
To: "Erik Tuerke" <<a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</a>><br>
Cc: "insight-users" <<a href="mailto:insight-users@itk.org">insight-users@itk.org</a>><br>
Sent: Friday, April 9, 2010 2:52:51 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna<br>
Subject: Re: [Insight-users] suppress shearing<br>
<br>
itkSimiliarity2DTransform and itkSimilarity3DTransform ally rotation,<br>
translation and isotropic scaling.<br>
<br>
Is your scaling isotropic?<br>
<br>
On Fri, Apr 9, 2010 at 4:39 AM, Erik Tuerke <<a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</a>> wrote:<br>
> Ahh...sorry for the double post but i am used to push strg-s to save a text but unfortunately this is assigned to sent.<br>
><br>
> anyway...<br>
><br>
> I am seeking a transform which is capable of applying a transformation in a way of translation, rotation and scaling.<br>
> Since i did not found such a transform, i thought taking the affine transform and suppress the shearing.<br>
> Is there any way to do so? Maybe setting the optimizer scale to 0 for the respective parameters...but what are the shearing parameters?<br>
><br>
> Thanks!<br>
><br>
> --<br>
> Erik Türke<br>
> Department of Neurophysics<br>
> Max-Planck-Institute for Human Cognitive and Brain Sciences<br>
> Stephanstrasse 1A<br>
> 04103 Leipzig<br>
> Germany<br>
> Tel: +49 341 99 40-2440<br>
> Email: <a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</a><br>
> <a href="http://www.cbs.mpg.de" target="_blank">www.cbs.mpg.de</a><br>
><br>
><br>
> _____________________________________<br>
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</div></div>--<br>
<div><div></div><div class="h5">Erik Türke<br>
Department of Neurophysics<br>
Max-Planck-Institute for Human Cognitive and Brain Sciences<br>
Stephanstrasse 1A<br>
04103 Leipzig<br>
Germany<br>
Tel: +49 341 99 40-2440<br>
Email: <a href="mailto:tuerke@cbs.mpg.de">tuerke@cbs.mpg.de</a><br>
<a href="http://www.cbs.mpg.de" target="_blank">www.cbs.mpg.de</a><br>
<br>
<br>
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