[vtkusers] x-ray effect in volume rendering

[Karthik Krishnan]

Yes. An average like this is more close to simulating xray
(absorption), which aggregates attenuation coeffs from all voxels, as
opposed to MIP driven solely by a single voxel. You could try to write
a volumeraycast function that does this contribute back to VTK.

On Fri, Oct 23, 2009 at 7:23 AM, Rocco Gasteiger
<post at rocco-gasteiger.de> wrote:
> Hello,
>
> Yes, you can! ;-)
>
> It is quite simply. In your composite function accumulate all sampled scalar
> values (or opacity values) on your ray and divide it by
> numSteps*globalMaximumScalarValue at the end (to get the average between 0
> and 1). I've implement it and it should work.
>
> Best regards, Rocco
>
> --------------------------------------------------
> Dipl.-Ing. Rocco Gasteiger
> Otto-von-Guericke University
> Faculty of Computer Science
> Department of Simulation and Graphics
> Universitätsplatz 2, 39106 Magdeburg, Germany
>
> Office:  G29-223
> Phone:   +49 391 67 127 59
> Fax:     +49 391 67 111 64
> Website: http://wwwisg.cs.uni-magdeburg.de/cvcms/
> --------------------------------------------------
>
>
>
> -----Original Message-----
> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf
> Of baliki2 at freemail.gr
> Sent: Friday, October 23, 2009 11:30 AM
> To: vtkusers at vtk.org
> Subject: [vtkusers] x-ray effect in volume rendering
>
>
> Is there a way that i can achieve an x-ray effect in volume rendering of
> DICOM images?
> I want to see the constructed volume as a 2D xray-like "image".
>
> I've tied the composite function combined with some tranfer and color
> functions, but i didn't take the exact x-ray effect. The images i use are of
> short type.
>
>
> _______________________________________________
> 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 VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
> _______________________________________________
> 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 VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>