Matthew, * Can you send us the exact number you are putting in for the transfer function? Make sure that you have values for the entire range of scalar values?
* Are you using OpenGL2 version? - Aashish On Wed, Sep 23, 2015 at 1:18 PM, Mathew Guilfoyle <[email protected]> wrote: > 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]> > 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 >> >> 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 >> > > > > _______________________________________________ > 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 > > -- *| Aashish Chaudhary | Technical Leader | Kitware Inc. * *| http://www.kitware.com/company/team/chaudhary.html <http://www.kitware.com/company/team/chaudhary.html>*
_______________________________________________ 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
