Thanks for the suggestions. After looking into it further the type of visualisation I am after is volume rendering of the data with an opacity transfer function based on the scalar data values.
I have set up my volume rendering to have full (i.e =1) opacity through the range of scalar values I’m interested in, reducing to near transparency either side of this. I also want specular highlighting of the opaque tissues. However, despite these settings Paraview does not seem to render any voxels as fully opaque and there is certainly no specular highlighting. Is this a known limitation? Many thanks > On 21 Sep 2015, at 15:10, David E DeMarle <[email protected]> wrote: > > Two suggestions: > * try contour filter instead of threshold if contour isn't available, apply > cell to point first. > * try the clip filter with the clip type set to scalar. > hth > > David E DeMarle > Kitware, Inc. > R&D Engineer > 21 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-881-4909 > > On Mon, Sep 21, 2015 at 9:40 AM, Mathew Guilfoyle <[email protected] > <mailto:[email protected]>> wrote: > I would be grateful for some advice on volume and surface rendering in > Paraview. > > I am trying to generate 3D skull models from CT data. The reason for using > Paraview is to take advantage of the detailed fly-through/movie capability. > I can generate an acceptable 3D model that I can interact with in OsiriX and > 3D Slicer, both of which I believe use VTK. However, in Paraview I am > struggling to create a 3D model that looks any good. > > When I apply a threshold filter and view as a ‘Surface’ the image is a lot > more ‘blocky’ than in the other two applications. The image is dominated by > the artifactual lines due to the original data being acquired as axial > slices; whereas in OsiriX and 3D Slicer this gets smoothed out and the > ‘genuine’ surface skull features (sutures etc) stand out. > > I realise this is probably question of apply the correct series of filters > and that the other two apps do this ‘under the hood’. However, i have tried > to apply Decimation and Smooth to the extracted surface and am not making any > headway. > > Any pointers would be very welcome > > M > _______________________________________________ > Powered by www.kitware.com <http://www.kitware.com/> > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > <http://www.kitware.com/opensource/opensource.html> > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView <http://paraview.org/Wiki/ParaView> > > Search the list archives at: http://markmail.org/search/?q=ParaView > <http://markmail.org/search/?q=ParaView> > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > <http://public.kitware.com/mailman/listinfo/paraview> >
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
