Hi again,<div><br></div><div>I would go for Brian's first suggestion (as Massi expected).</div><div>You still need to consider some issues when following such approach (and that also depends on why do you need to match those two images):</div>
<div>- As you will re-mesh your PET images, you won't probably have the same reference p(0,0,0) for both meshes. So, you should properly initiate the registration by performing some alignment like translation + rotation.</div>
<div>- Now you have your meshes aligned with each other, you can perform a rigid registration (also translation + rotation) but this time by minimizing the "distance" between the landmarks on one of the meshes and their correspondences on the other.</div>
<div>- You may go further (depends on your requirements) and perform an affine transformation or even a non-rigid registration. Note that this will deform your data.</div><div><br></div><div>Sorry for not providing hints about employing itk into this, I am a new user of this library.</div>
<div><br></div><div>Enjoy!</div><div><br></div><div>Mhd<br><br><div class="gmail_quote">On Thu, Sep 13, 2012 at 9:47 PM, brian avants <span dir="ltr"><<a href="mailto:stnava@gmail.com" target="_blank">stnava@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">massi<br>
<br>
it just occurred to me that it is possible to go the other way as well<br>
--- i.e. convert your mesh to an image and then register the images<br>
standard methods. e.g. ANTs or some ITK basics.<br>
<br>
to try this approach , see :<br>
ITKv4/Modules/Core/Mesh/include/itkTriangleMeshToBinaryImageFilter.h<br>
<br>
i am not sure which approach will be easier. however, both will<br>
probably lead to some issues with physical space / orientation which<br>
you will probably have to resolve in some customized manner.<br>
<span><font color="#888888"><br>
brian<br>
</font></span><div><div><br>
<br>
<br>
<br>
On Thu, Sep 13, 2012 at 3:30 PM, Massi <<a href="mailto:Massinissa.Bandou@usherbrooke.ca" target="_blank">Massinissa.Bandou@usherbrooke.ca</a>> wrote:<br>
> Thanks Brian!! I will try this!!<br>
><br>
><br>
> Massi<br>
><br>
><br>
><br>
> --<br>
> View this message in context: <a href="http://itk-users.7.n7.nabble.com/help-for-Registration-tp29455p29461.html" target="_blank">http://itk-users.7.n7.nabble.com/help-for-Registration-tp29455p29461.html</a><br>
> Sent from the ITK - Users mailing list archive at Nabble.com.<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<br>
> <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
><br>
> Kitware offers ITK Training Courses, for more information visit:<br>
> <a href="http://www.kitware.com/products/protraining.php" target="_blank">http://www.kitware.com/products/protraining.php</a><br>
><br>
> Please keep messages on-topic and check the ITK FAQ at:<br>
> <a href="http://www.itk.org/Wiki/ITK_FAQ" target="_blank">http://www.itk.org/Wiki/ITK_FAQ</a><br>
><br>
> Follow this link to subscribe/unsubscribe:<br>
> <a href="http://www.itk.org/mailman/listinfo/insight-users" target="_blank">http://www.itk.org/mailman/listinfo/insight-users</a><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<br>
<a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Kitware offers ITK Training Courses, for more information visit:<br>
<a href="http://www.kitware.com/products/protraining.php" target="_blank">http://www.kitware.com/products/protraining.php</a><br>
<br>
Please keep messages on-topic and check the ITK FAQ at:<br>
<a href="http://www.itk.org/Wiki/ITK_FAQ" target="_blank">http://www.itk.org/Wiki/ITK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.itk.org/mailman/listinfo/insight-users" target="_blank">http://www.itk.org/mailman/listinfo/insight-users</a><br>
</div></div></blockquote></div><br></div>