[X3D-Public] Online graphics survey: volume rendering techniques

[Bederov, Sergey]

Hello Nicholas,

The two views on the videos are not marked. I know what is isosurface, so the volumetric is apparently segmentation, but for someone else it may be not so obvious.

The isosurface view is generally clearer and easier to understand. But it's clear that some part of information is lost, for example, objects of low density. Experts on the subject should decide whether the lost information is important.

>From the 3D graphics point of view, I have noticed that the volumetric view has only one set of textured layers, and the objects become transparent and disappear when the view is rotated 90° to the camera. I would recommend creating three sets of textured layers, orthogonal to each other, and changing their transparency in real time depending on the viewpoint position. You will have to choose the angle-transparency relationship by trial and error to eliminate artifacts such as "wobbling" and abrupt changes of transparency.

                                                                    Sergey Bederov


From: X3D-Public [mailto:x3d-public-bounces at web3d.org] On Behalf Of Nicholas Polys
Sent: Saturday, December 22, 2012 1:47 AM
To: med at web3d.org; HCI-Students; x3d-public; x3d at web3d.org
Subject: [X3D-Public] Online graphics survey: volume rendering techniques


Greetings all~

This email is an invitation to participate in an online study we are conducting. We have processed a set of multi-channel microscopy stacks (from cellimagelibrary.org<http://cellimagelibrary.org>) with two different pipelines and X3D techniques, Segmented Volume rendering and ISOSurface Volume rendering. We would like your help in comparing these two techniques!

Please visit the following link to the survey and submit your answers. Viewing the six examples and and answering the questions should take about 25 minutes:

https://survey.vt.edu/survey/entry.jsp?id=1355866408333

Thanks in advance for your participation!

You are welcome to email me with any questions.



      _nicholas


--
Nicholas F. Polys, Ph.D.

Director of Visual Computing
Virginia Tech Research Computing

Affiliate Professor
Virginia Tech Department of Computer Science
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