[Insight-users] mesh creation from segmented image
Luis Ibanez
luis.ibanez at kitware.com
Fri Apr 6 10:04:41 EDT 2007
Hi Kegang,
Yes, vtkContour is an appropriate filter for this task.
This will give you conformal meshes as long as your object
is completely contained inside the extent of the image.
If that is not the case, you may have to use the Boundary
filter in order to add a faces around the volume.
There is family of classes that have been recently contributed
to ITK for representing Meshes using the QuadEdge structure.
These classes will, at some point, be suitable for ensuring
that your mesh is conformal. However, they are still being
refactored to make it match the standards of the toolkit.
At this point your best option is to save the mesh that the
vtkContour produces, as a vtkPolyData, then load it into ParaView
and look at the boundaries of the Mesh. If your surface is completely
closed, there shouldn't be any boundaries.
You can download ParaView from
www.paraview.org
Regards,
Luis
---------------
KEGANG HUA wrote:
> Hi, Luis
>
> Which of the filter will generate triangular mesh that is suitable for deformable model? I have a mesh generated by vtkContour filter. Would that be good?
>
> I think at least I need my mesh to be so called conforming triangular mesh, i.e. each triangle edge is shared by eaxactly two triangles.
>
> How could I check it in ITK or VTK?
>
> Thanks!
>
>
> ----- Original Message -----
> From: Luis Ibanez <luis.ibanez at kitware.com>
> Date: Thursday, April 5, 2007 3:31 pm
> Subject: Re: RE : Re: Re : Re : [Insight-users] mesh creation from segmented image
> To: Miladi Med Amine <miladimedamine at yahoo.fr>
> Cc: Insight Users <insight-users at itk.org>
>
>
>> Hi Miladi,
>>
>> Please read the ITK Software Guide:
>>
>>
>>
>> You will find examples on how to read multiple 2D
>> slice files into a single 3D image in section 7.11.1
>> "Reading Image Series" in pdf-page 319.
>>
>> The source code example can be found in
>>
>> Insight/Examples/IO/ImageSeriesReadWrite.cxx
>>
>>
>>
>> For an example on how to use the VTK marching
>> cubes on an ITK image, please look at:
>>
>>
>> InsightApplications/Auxiliary/vtk/
>> itkReadITKImage3DSegmentShowVTK.cxx
>>
>> It shows how to convert an ITK image into vtkImageData
>> and then pass it to the vtkContour filter.
>>
>>
>> Regards,
>>
>>
>> Luis
>>
>>
>>
>> -------------------------
>> Miladi Med Amine wrote:
>> > Hi,
>> > thanks you for help.
>> > can you let me how get the 3d binary image from slices.
>> > Now i m thinking about marching cube marching cube algorithme using
>>
>> > vtkImageMarchingCubes,so can you if you knew ho to use this filter
>>and
>> > can it get segmented slices as my exemple.
>> > thanks
>> >
>> > */Luis Ibanez <luis.ibanez at kitware.com>/* a écrit :
>> >
>> >
>> > Hi Miladi,
>> >
>> > Thanks for sending your example images.
>> >
>> > Given that you already have segmentations for
>> > each slice, the easy way to generate a contour
>> > is to take the 3D binary image that you have
>> > and to pass it to the filter:
>> >
>> >
>> >
>> > This filter will produce an itkMesh that is the
>> > contour of the segmentation.
>> >
>> > This is interesting if you plan to do something
>> > like Deformable Models.
>> >
>> >
>> > Note that if your purpose is to do visualization
>> > of the contour, then you will find more useful
>> > to convert the ITK image of the segmentation into
>> > a VTK image, and then pass it to the vtkContour filter.
>> >
>> > You will find examples on how to do this in the
>> > directory:
>> >
>> > InsightApplications/Auxiliary/vtk/
>> > itkReadITKImage3DSegmentShowVTK.cxx
>> >
>> >
>> >
>> > Regards,
>> >
>> >
>> > Luis
>> >
>> >
>> >
>> > -------------------------
>> > Miladi Med Amine wrote:
>> > > Hi Luis;
>> > > my question is what is the way to create a mesh of endocade
>>for
>> > > exemple.i have a series of image as the exemple sended to you
>> > > representing the object.
>> > > and i would like to get some point the contour for each image,and
>> > create
>> > > the mesh.
>> > > There's a way in itk to do that.
>> > >
>> > > Thanks
>> > > MILADI
>> > >
>> > > ----- Message d'origine ----
>> > > De : Luis Ibanez
>> > > À : Miladi Med Amine
>> > > Envoyé le : Mardi, 27 Mars 2007, 16h30mn 16s
>> > > Objet : Re: Re : [Insight-users] mesh creation from
>>segmented image
>> > >
>> > > Hi Miladi,
>> > >
>> > >
>> > > What is your question ?
>> > >
>> > >
>> > > Thanks
>> > >
>> > >
>> > > Luis
>> > >
>> > >
>> > > ------------------------
>> > > Miladi Med Amine wrote:
>> > > >
>> > > > hi;
>> > > > I would like to help me more.
>> > > > So i have a series of segmented image of endocade,and my
>> > objectif is to
>> > > > create a mesh to modelise the endocade using itk.
>> > > > thanks
>> > > > ----- Message d'origine ----
>> > > > De : Luis Ibanez
>> > > > À : medamine
>> > > > Cc : insight-users at itk.org
>> > > > Envoyé le : Lundi, 26 Mars 2007, 0h45mn 37s
>> > > > Objet : Re: [Insight-users] mesh creation from segmented image
>> > > >
>> > > > Hi Medamine,
>> > > >
>> > > > You may want to look at this filter:
>> > > >
>> > > >
>> > >
>> >
>> > > >
>> > > >
>> > > > Regards,
>> > > >
>> > > >
>> > > > Luis
>> > > >
>> > > >
>> > > >
>> > > > --------------------
>> > > > medamine wrote:
>> > > > > hi .
>> > > > > i would like to create a mesh from a segmented
>> > image(endocade),and i m
>> > > > > thinking about using snake to get cordonates of "contour".
>> > > > > my question there's a methode to do that using itk?
>> > > > > thanks for all.
>> > > >
>> > > >
>> > > >
>> > ------------------------------------------------------------------------
>> > > > Découvrez une nouvelle façon d'obtenir des réponses à
>>toutes vos
>> > > > questions ! Profitez des connaissances, des opinions et des
>> > expériences
>> > > > des internautes sur Yahoo! Questions/Réponses
>> > > > .
>> > >
>> > >
>> > >
>> > ------------------------------------------------------------------------
>> > > Découvrez une nouvelle façon d'obtenir des réponses à toutes
>>vos
>> > > questions ! Profitez des connaissances, des opinions et des
>> > expériences
>> > > des internautes sur Yahoo! Questions/Réponses
>> > > .
>> >
>> >
>> > ------------------------------------------------------------------------
>> > Découvrez une nouvelle façon d'obtenir des réponses à toutes vos
>> > questions ! Profitez des connaissances, des opinions et des
>>expériences
>> > des internautes sur Yahoo! Questions/Réponses
>> > <>.
>> _______________________________________________
>> Insight-users mailing list
>> Insight-users at itk.org
>>
>
>
More information about the Insight-users
mailing list