[ITK-users] watershed on surface meshs

[Dženan Zukić]

Hi Roman,

I don't know of any implementation of mesh watershed segmentation. ITK does
not really have mesh processing capabilities, it is mostly limited to
conversion between mesh and image representations.

A colleague <http://www.cg.informatik.uni-siegen.de/en/chiosa-iurie> worked
on something related, maybe he can provide the source code if you ask.

And we are moving to discourse <https://discourse.itk.org/>. Re-posting
this question there might be useful.

Regards,
Dženan

On Fri, Nov 24, 2017 at 6:26 AM, Grothausmann, Roman Dr. <
grothausmann.roman at mh-hannover.de> wrote:

> Dear mailing list members,
>
>
> I need to separate a mesh at "curved corners" (see attached PNG, using the
> colored labels from a facet analysis do not suffice but go in the right
> direction). So my current thought is to run vtkCurvature to get a Gaussian
> curvature value per point/vertex and then try to separate regions of
> positive values around local maxima. Just thresholding the result of
> vtkCurvature does not fully separate each local max from neighboring ones,
> but to my understanding a surface watershed would. I found two publications
> by Mangan and Whitaker on this:
>
> Partitioning 3D surface meshes using watershed:
> http://teacher.en.rmutt.ac.th/ktw/Resources/Full%20paper%20P
> DF/Partitioning%203D%20surface%20meshes%20using%20watershed%
> 20segmentation.pdf
>
> Surface Segmentation Using Morphological Watersheds:
> https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd
> =4&cad=rja&uact=8&ved=0ahUKEwjD0by1lafWAhVUGsAKHZ2MAbUQFgg_M
> AM&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownlo
> ad%3Fdoi%3D10.1.1.464.2788%26rep%3Drep1%26type%3Dpdf&usg=
> AFQjCNGX-p9-ElQFcpsUyBRO0pCjBKCmNg
>
> Does anybody know about an implementation for this in VTK/ITK or another
> open-source library? If not, would it be possible to transfer the ITK
> watershed implementation for voxel data to mesh data, e.g. to crate a
> VTKmorphWatershedFilter?
>
> Thanks for any help or hints.
> Roman
>
>
> --
> Dr. Roman Grothausmann
>
> Tomographie und Digitale Bildverarbeitung
> Tomography and Digital Image Analysis
>
> Medizinische Hochschule Hannover
> Institut für Funktionelle und Angewandte Anatomie
> OE 4120, Carl-Neuberg-Str. 1, 30625 Hannover, Deutschland
>
> Tel. +49 511 532-2900
> grothausmann.roman at mh-hannover.de
> http://www.mh-hannover.de/anatomie.html
>
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