SV: [Insight-users] Which types of meshes canDeformableModelSimplexMesh load?

[Leila baghdadi]

Hi Marcus,

ftp://public.kitware.com/pub/itk/Data/Synthetic/

there is a binary image

sphere.mhd
and
sphere.raw.gz (which you must unzip),

you should be able to load this image both
as original image and "load mesh"

if you have no difficulty with the above, there is something wrong with
your data,

otherwise you need to trouble shoot what goes wrong with your built


HTH

Leila

On Tue, 2005-10-18 at 17:29 +0200, Marcus Wallin wrote:
> Thank you for your answers!
> 
> I hadn't realized that I used an old version of ITKApplications (v2.0.1).
> Now I have the most recent ITKApp from CVS (since I had compile problems
> with 2.2.0) and have also got your help document.
> 
> I followed your suggestion and created two 3D-images with a *.mhd header
> file that points to a list of *.raw files that are the actual images (binary
> mask of the mesh and the actual patient images). However, when I follow the
> step-by-step guide and reach the step where the mesh is loaded, the program
> tells me the following errors:
> 
> "ERROR: In \VTK-4.4-LatestRelease\src\Graphics\vtkDecimatePro.cxx, line 148
> vtkDecimatePro (046BE708): No data to decimate!"
> 
> and
> 
> "No points in grid"
> 
> Can you please suggest to me what the error might be?
> 
> I suspect that the error is in my "mesh.mhd", though I have no idea what it
> can be.
> 
> 
> The contents of my "mesh.mhd" is:
> 
> NDims = 3
> DimSize = 256 256 78
> ElementSpacing = 1 1 1
> Position = 0 0 0
> ElementByteOrderMSB = False
> ElementNumberOfChannels = 3
> ElementType = MET_UCHAR
> ElementDataFile = mesh.%04d.raw 0 77 1
> 
> 
> 
> Thanks,
> 
> --
> Marcus Wallin
> Software Engineer
> Chalmers University of Technology, Sweden
> 
> 
> 
> 
> -----Ursprungligt meddelande-----
> Från: Leila baghdadi [mailto:baghdadi at sickkids.ca] 
> Skickat: den 14 oktober 2005 17:21
> Till: Marcus Wallin
> Kopia: insight-users at itk.org
> Ämne: Re: [Insight-users] Which types of meshes
> canDeformableModelSimplexMesh load?
> 
> Marcus,
> 
> I setup a little help document which you should be able to load and get
> the information you require, but it is probably not as comprehensive as
> one would hope mainly due to lack of time.
> 
> 1. currently, there is no support for loading an actual mesh to this
> program although it is in my to do list,
> 
> 2. you can read a binary image which is then sent to vtk marching cubes
> filter to create a mesh so that is why itkImageFileReader is used
> because you are supposed to read an image (not a mesh)
> 
> 3. you can load your image (i.e, MR or which modality) and then try to
> load your mesh over it (i.e, read the binary image which represents your
> initial model of the mesh)
> 
> 4. right now you can load a 3d image (check the itk documentation and I
> believe I do have a little test file as well), your image should have
> two components,
>   -- *.mhd (text file , header containing the name of the raw image)
>   -- *.raw
> 
> 5. I suggest you read through the references that help provides and make
> sure you are familiar with the concept of simplex meshes and their
> corresponding deformable models which was originally introduced by
> Herve Delingette of INRIA, France.
> 
> 
> Please let me know of any problems,
> 
> enjoy ITK!
> 
> 
> Leila
> 
> On Fri, 2005-10-14 at 17:07 +0200, Marcus Wallin wrote:
> > Hi,
> > 
> > I'm trying to get the DeformableModelSimplexMesh (in ITKApplications) to
> > load a mesh. The mesh I have is exported from Amira and is in STL ascii
> > format (I have tried a few other formats as well with the same result).
> > 
> > However, regardless of what type I choose for my mesh, it seems it cannot
> be
> > imported in DeformableModelSimplexMesh. What happens is that the program
> > dies and says that no supported file type was selected. The reason for
> this
> > is that the program uses itkImageFileReader, and of course this reader
> > cannot read the mesh since it is not an image. 
> > 
> > So, what format does DeformableModelSimplexMesh require of the mesh to
> load
> > properly?
> > 
> > I also wonder how the DeformableModelSimplexMesh is supposed to be able to
> > deform a mesh, assuming a mesh is loaded successfully, if only one image
> can
> > be loaded at a time? Is the image required to be a 3D-image or how can I
> go
> > about to load a set of CT-slices that I have at hand?
> > 
> > Thanks,
> > 
> > --
> > Marcus Wallin
> > Software Engineer
> > Chalmers University of Technology, Sweden
> > 
> > 
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> -- 
> Leila baghdadi <baghdadi at sickkids.ca>
> 
> _______________________________________________
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> Insight-users at itk.org
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-- 
Leila baghdadi <baghdadi at sickkids.ca>