[Insight-users] Re: itkdeformable3DFilter problems (fwd)

[Pieter Vos]

I also recommend you change the last line of the matlab file to:
quiver(1:64, 1:64, arr(:,:,18,1), arr(:,:,18,2), 0.5);

there are even more obvious problems shown.
I am still not know if it is my problem (maybe I should not use that series
of filters to get a 2nd order derviative gradient map, in such case, I hope
someone can give me a standard pipeline of getting the 2nd order deriviative
gradient map) or there is something wrong in one of these filters.

we need a discussion here.

ting


-----Original Message-----
From: Pieter Vos <pieterv@nat-239.azn.nl>
To: Ting Chen <chenting@graphics.cis.upenn.edu>
Date: Wednesday, May 08, 2002 10:38 AM
Subject: Re: [Insight-users] Re: itkdeformable3DFilter problems


>Hi, it's me again,
>
>I made the binary image's internal region a bit smaller, but look at
>mesh5.jpeg. The deformable mesh is being pulled away form the below edge.
>I really don't get this because I checked the gradient map and there it is
>all ok (all vectors are pointing towards the edge). But as you can see in
>the jpeg file, one part of the mesh in being pulled towards the edge and
>the other part is being pulled away.
>
>Can you explain this behaviour? How can I correct it?
>
>Many thanks,
>
>--
>Pieter Vos
>UMC Radboud Nijmegen
>The Netherlands
>mailto:pieterv@radiology.azn.nl
>