[vtkusers] compute a geodesic distance

Mon Jun 6 17:36:27 EDT 2005

You can do a "pseudo-geodesic" distance using the Dijkstra class available
here:

http://www2.imm.dtu.dk/~rrp/VTK/

(I have not used it for a while, so beware of compilation errors).

The "Real Thing" to do is to use a fast marching method. However, this is
still to be implemented/available in VTK.

Cheers,
Rasmus

On Mon, 6 Jun 2005, Burlen wrote:

> Hi maybe this isn't the best way, but if you could get a series of points along the path between the start and end point (maybe using the vtkPlane and vtkCutter) and estimate the arc length using some numerical integration technique...
> 
> On Monday 06 June 2005 03:56 pm, JosÃ© Nsasi B. wrote:
> > Hi All,
> > 
> > 
> > Is any one knows how to compute a geodesic distance (surface distance)Â from one vertex to an other vertex in a given vtkPolyData? Is this computation available in VTK?
> > 
> > 
> > Joseph.
> > 
> > 
> > 
> >  
> > Â 
> > 
> > 
> > 
> > >From: vtkusers-request at vtk.org
> > >Reply-To: vtkusers at vtk.org
> > >To: vtkusers at vtk.org
> > >Subject: vtkusers Digest, Vol 14, Issue 12
> > >Date: Mon, 6 Jun 2005 12:00:56 -0400 (EDT)
> > >
> > >Send vtkusers mailing list submissions to
> > > vtkusers at vtk.org
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> > >To subscribe or unsubscribe via the World Wide Web, visit
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> > >or, via email, send a message with subject or body 'help' to
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> > >When replying, please edit your Subject line so it is more specific
> > >than "Re: Contents of vtkusers digest..."
> > >
> > >
> > >Today's Topics:
> > >
> > > 1. Re: vtk and video (Simon Drouin)
> > > 2. can i pass an array like argument to vtkBMPreader (med ali)
> > > 3. Do to use STL Vector effectively? (Munenori Yoshioka)
> > > 4. VTK CVS build on OSX 10.4 fails...any ideas? (Dan White)
> > > 5. Stretching and shrinking 2D images (julien.barneoud at kodak.com)
> > >
> > >
> > >----------------------------------------------------------------------
> > >
> > >Message: 1
> > >Date: Mon, 06 Jun 2005 09:34:12 -0400
> > >From: Simon Drouin <sdrouin at bic.mni.mcgill.ca>
> > >Subject: Re: [vtkusers] vtk and video
> > >To: Perrine Guillemot <guillemot_perrine at yahoo.fr>
> > >Cc: Marwan Darwish <darwish at aub.edu.lb>, vtkusers at vtk.org
> > >Message-ID: <42A450D4.4060505 at bic.mni.mcgill.ca>
> > >Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> > >
> > >Perrine Guillemot wrote:
> > >
> > > >Hi everybody,
> > > >
> > > >Can anyone please explain me how to use vtkVideoSource
> > > >or where can I find some examples for using this
> > > >class?
> > > >
> > > >
> > >Here's the simplest piece of code you can write to grab a video frame.
> > >
> > >/* Create the source. Replace the vtkVideoSource::New() with
> > >vtkMILVideoSource::New() or vtkWin32VideoSource::New() depending on the
> > >type of frame grabber you use. */
> > >vtkVideoSource * source = vtkVideoSource::New();
> > >
> > >// image size
> > >source->SetFrameSize( 640, 480, 1 );
> > >
> > >// will output grayscale image.
> > >source->SetOutputFormatToLuminance();
> > >
> > >// 15 frames/sec
> > >source->SetFrameRate(15);
> > >
> > >// Set parameter in frame grabber hardware, mainly
> > >source->Initialize();
> > >
> > >// Grab a frame to the buffer ( warning: it is not available in the
> > >output unless you update the pipeline ).
> > >source->Grab();
> > >
> > >then you can use source->GetOutput() to get the current frame.
> > >
> > >If you have any more questions, please ask.
> > >
> > >s.
> > >
> > >
> > >------------------------------
> > >
> > >Message: 2
> > >Date: Mon, 6 Jun 2005 16:00:30 +0200 (CEST)
> > >From: med ali <daalyusmo at yahoo.fr>
> > >Subject: [vtkusers] can i pass an array like argument to vtkBMPreader
> > >
> > >To: xujf at sjtu.edu.cn, vtkusers at vtk.org
> > >Message-ID: <20050606140030.53862.qmail at web26409.mail.ukl.yahoo.com>
> > >Content-Type: text/plain; charset="iso-8859-1"
> > >
> > >
> > >Hi all,
> > >
> > >
> > >
> > >i want use vtkBMPReader but not directly on the files
> > >
> > > instead of passing the prefix of slices can i pass the array data of pixels to vtkBMPReader
> > >
> > >/*
> > >
> > >bmp= vtkBMPReader::New();
> > >
> > >bmp->SetFilePrefix (prefix);
> > >
> > >bmp->SetFileNameSliceOffset(1);
> > >
> > >bmp->SetFilePattern("%s%d.bmp");
> > >
> > >*/
> > >
> > >
> > >---------------------------------
> > > DÃ©couvrez le nouveau Yahoo! Mail : 1 Go d'espace de stockage pour vos mails, photos et vidÃ©os !
> > >CrÃ©ez votre Yahoo! Mail
> > >-------------- next part --------------
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> > >
> > >------------------------------
> > >
> > >Message: 3
> > >Date: Mon, 6 Jun 2005 23:03:17 +0900
> > >From: "Munenori Yoshioka" <munenori at indigo.plala.or.jp>
> > >Subject: [vtkusers] Do to use STL Vector effectively?
> > >To: <vtkusers at vtk.org>
> > >Message-ID: <001301c56aa0$7d2f9870$0c01a8c0 at osaka>
> > >Content-Type: text/plain; charset="iso-2022-jp"
> > >
> > >Hello to all user.
> > >
> > >For instance, what method do you use by the method of most smoothly
> > >displaying the memory data of 512*512*1 stored in STL Vector?
> > >
> > >Thanks very much to everyone that helps.
> > >
> > >Munenori Yoshioka, in japan munenori at indigo.plala.or.jp
> > >
> > >
> > >
> > >------------------------------
> > >
> > >Message: 4
> > >Date: Mon, 6 Jun 2005 18:05:02 +0300
> > >From: Dan White <dan at chalkie.org.uk>
> > >Subject: [vtkusers] VTK CVS build on OSX 10.4 fails...any ideas?
> > >To: vtkusers at vtk.org
> > >Message-ID: <C3CE123D-AEA6-44A4-962D-E5DDCBEE0C0A at chalkie.org.uk>
> > >Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed
> > >
> > >Hi,
> > >
> > > I am trying to make a VTK CVS build on an apple G5 with 10.4 Tiger.
> > > using the apple supplied gcc 4
> > > for this project:
> > > www.bioimagexd.org
> > >
> > > I'm getting errors in the linking stage...
> > > looks like some symbol has the same name in the gcc libs as in
> > >vtk or
> > > something:
> > >
> > > when building libvtkImaging.dylib I get
> > > ld: multiple definitions of symbol
> > > in
> > > libgcc.a and libgcc_s.dylib
> > > the symbols are
> > > ___divdi3
> > > and
> > > ___udivdi3
> > >
> > > Before killing myself trying to fix it,
> > >
> > > I wondered if you had any good tips for getting the OSX 10.4
> > >build to
> > >
> > > work with the current CVS
> > >
> > > cheers
> > >
> > > Dan
> > >
> > >
> > >
> > >Dr. Daniel James White BSc. (Hons.) PhD
> > >Bioimaging Coordinator
> > >Nanoscience Centre and Department of Biological and Environmental
> > >Sciences
> > >Division of Molecular Recognition
> > >Ambiotica C242
> > >PO Box 35
> > >University of JyvÃ¤skylÃ¤
> > >JyvÃ¤skylÃ¤
> > >FIN 40014
> > >Finland
> > >
> > >+358 14 260 4183 (work)
> > >+358 468102840 (mobile)
> > >http://www.bioimagexd.org
> > >http://www.chalkie.org.uk
> > >dan at chalkie.org.uk
> > >white at cc.jyu.fi
> > >
> > >
> > >
> > >
> > >------------------------------
> > >
> > >Message: 5
> > >Date: Mon, 6 Jun 2005 17:09:43 +0200
> > >From: julien.barneoud at kodak.com
> > >Subject: [vtkusers] Stretching and shrinking 2D images
> > >To: vtkusers at vtk.org
> > >Message-ID:
> > > <OF7781A066.AC89291C-ONC1257018.0052CB93-C1257018.005349B9 at knotes.kodak.com>
> > >
> > >Content-Type: text/plain; charset="us-ascii"
> > >
> > >Hi Tanya,
> > >
> > >Thanks for your help. I am now also using the same classes as you did ...
> > >Thank you very much.
> > >
> > >Regards,
> > >
> > >
> > >Julien BARNEOUD
> > >-------------- next part --------------
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> > >------------------------------
> > >
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> > >vtkusers at vtk.org
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> > >
> > >End of vtkusers Digest, Vol 14, Issue 12
> > >****************************************
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