<div>Hi,</div><div> </div><div>I iterate over an image, to find an index of the point that I wish to transform via the deformation field. I then use itk's TransformIndextoPhysicalPoint and apply a transform with the deformation field to map the point.</div>
<div> </div><div>I hope this helps you.</div><div> </div><div>take care,</div><div>John<br><br></div><div class="gmail_quote">On Tue, Jul 26, 2011 at 5:15 PM, Marta Peroni <span dir="ltr"><<a href="mailto:m.peroni@gmail.com">m.peroni@gmail.com</a>></span> wrote:<br>
<blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">Dear all, <br>I wonder if any of you knows a simply way to apply a generic vector field to a point. <br>
To have more insight in this: <br>I generate an artificial deformation by means of gaussians (i.e. the final vector field is a composition of 3 gaussians)<br>
I have a point in physical coordinates (A) and its correspondent point (B) on the final image (extracted via SIFT algorithm)<br>I want to transform A and check that is "close enough" to B. <br><br>The "easiest" way I thought about is the following: <br>
1) read point and vector field in<br>2) reconstruct the transform by means of interpulation ---> I mean basically I would need to interpulate the vector field for example with Bsplines because my points can be anywhere<br>
3) derive the corresponding vector that has to be applied on the point A<br>4) distance from B<br><br>I'm using itk 3.20 on win/linux :) and I would really appreciate any help :) <br>thanks<br><font color="#888888">Marta<br>
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