You can information about these artifacts in virtually any book or article about volume rendering:
* There is the Volume Rendering section in the Advanced Computer Graphics chapter in "The Visualization Toolkit" by Will Shroeder, Ken Martin and Bill Lorensen: http://vtk.org/VTK/help/book.html * "Introduction to Volume Rendering" by Barthold Lichtenbelt, Randy Crane and Shaz Naqvi http://www.amazon.com/Introduction-Rendering-Hewlett-Packard-Professional-Books/dp/0138616833 * "Real-Time Volume Graphics" by Klaus Engel, Markus Hadwiger, Joe M. Kniss, Christof Rezk-Salama and Daniel Weiskopf and the Siggraph courses derived from their book: http://www.real-time-volume-graphics.org/?page_id=3 On Mon, Sep 14, 2009 at 10:59 AM, david anaya <[email protected]> wrote: > Do you know a good paper, book or web page with more information about these > "wood artifacts"? > Thanks > > > > > On Mon, Sep 14, 2009 at 3:53 PM, Francois Bertel > <[email protected]> wrote: >> >> Hello, >> >> There are just the so-called "wood artifacts" due to undersampling the >> dataset. A solution is to make the sampling distance smaller (however >> it will make the rendering slower). >> >> vtkKWEGPUVolumeRayCastMapper *mapper; >> [...] >> mapper->SetSampleDistance(mapper->GetSampleDistance()/2.0); >> >> On Mon, Sep 14, 2009 at 9:01 AM, Cartik Sharma <[email protected]> >> wrote: >> > hi David, >> > >> > I get these too. This is a form of antialiasing associated with >> > oversampling >> > at certain >> > intensity points due to distribution over the volumetric surface. >> > >> > So we need to generate the requisite antialiasing correction filters to >> > offset the same. >> > >> > This will refine the 3d model prior to final 3D rendering. >> > >> > best, >> > Cartik >> > >> > ----- Original Message ----- >> > From: david anaya >> > To: vtkedge >> > Sent: Monday, September 14, 2009 6:08 AM >> > Subject: [VtkEdge] concentric lines in the result image >> > Hi. >> > This is only a doubt. >> > I have attached an image of a skull rendered with vtkedge. >> > It looks fine but in the skull's surface appears concentric lines .... >> > or >> > something similar. >> > what is the reason of this effect? >> > may be the interpolation method? >> > Thanks in advance. >> > Best regards, >> > David. >> > >> > ________________________________ >> > >> > _______________________________________________ >> > VtkEdge mailing list >> > [email protected] >> > http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge >> > >> > _______________________________________________ >> > VtkEdge mailing list >> > [email protected] >> > http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge >> > >> > >> >> >> >> -- >> François Bertel, PhD | Kitware Inc. Suite 204 >> 1 (518) 371 3971 x113 | 28 Corporate Drive >> | Clifton Park NY 12065, USA >> _______________________________________________ >> VtkEdge mailing list >> [email protected] >> http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge > > > _______________________________________________ > VtkEdge mailing list > [email protected] > http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge > > -- François Bertel, PhD | Kitware Inc. Suite 204 1 (518) 371 3971 x113 | 28 Corporate Drive | Clifton Park NY 12065, USA _______________________________________________ VtkEdge mailing list [email protected] http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge
