<div dir="ltr"><div><div>Thanks Matt,<br><br></div>It is strange then, that I can extract data from the displacement field that seems to represent the field that would transform the 'pre-deformation' image into the 'deformation' image. (There is a significant deformation in the 'deformation data' in the negative y-direction, which shows up nicely in the displacement field.<br>
<br></div>Must I be doing something strange for this to happen?<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Oct 9, 2013 at 10:31 AM, Matt McCormick <span dir="ltr"><<a href="mailto:matt.mccormick@kitware.com" target="_blank">matt.mccormick@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Tim,<br>
<br>
No, the WarpImageFilter should be generating a 'pre-deformation'<br>
look-alike. For more information, see the Software Guide.<br>
<br>
HTH,<br>
Matt<br>
<div><div class="h5"><br>
On Wed, Oct 9, 2013 at 4:48 PM, Tim Bhatnagar <<a href="mailto:tim.bhatnagar@gmail.com">tim.bhatnagar@gmail.com</a>> wrote:<br>
> Hello all,<br>
><br>
> I use the ITK examples ImageRegistration5, ImageRegistration8 and<br>
> DeformableRegistration2 (Demon's) for registration of normal and deformed<br>
> data (same subject). Briefly, I do some pre-registration of my data using<br>
> ImageReg5 and ImageReg8 (for gross alignment), after which I take the<br>
> produced displacement fields, and use them as the 'initial displacement<br>
> field' for DefReg2.<br>
><br>
> In all cases, I am using my 'pre-deformation' data as my fixed source, and<br>
> my 'deformation' data as my moving source.<br>
><br>
> I have some fiducial markers to check the accuracy of the generated<br>
> displacement field, and it looks pretty good. However, when trying to<br>
> produce figures, my registration output looks much closer to my<br>
> 'deformation' data, and sometimes the output and the actual 'deformation'<br>
> data are offset by a magnitude.<br>
><br>
> In my situation, should I be aiming to have my registration output appear<br>
> similar to my 'pre-deformation' data? (I get confused reading the ITK<br>
> explanation on that) Shouldn't I be able to produce the a 'deformation'<br>
> look-a-like by using WarpImageFilter with my 'pre-deformation' data and my<br>
> generated displacement field?<br>
><br>
> Sorry this was so wordy. Any help would be much appreciated.<br>
><br>
> --<br>
> Tim Bhatnagar<br>
> PhD Candidate<br>
> Orthopaedic Injury Biomechanics Group<br>
> Department of Mechanical Engineering<br>
> University of British Columbia<br>
><br>
> Rm 5000 - 818 West 10th Ave.<br>
> Vancouver, BC<br>
> Canada<br>
> V5Z 1M9<br>
><br>
> Ph: (604) 675-8845<br>
> Fax: (604) 675-8820<br>
> Web: <a href="http://oibg.mech.ubc.ca" target="_blank">oibg.mech.ubc.ca</a><br>
><br>
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</blockquote></div><br><br clear="all"><br>-- <br>Tim Bhatnagar<br>PhD Candidate<br>Orthopaedic Injury Biomechanics Group<br>Department of Mechanical Engineering<br>University of British Columbia<br><br>Rm 5000 - 818 West 10th Ave.<br>
Vancouver, BC<br>Canada<br>V5Z 1M9<br><br>Ph: (604) 675-8845<br>Fax: (604) 675-8820<br>Web: <a href="http://oibg.mech.ubc.ca" target="_blank">oibg.mech.ubc.ca</a><br>
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