YON's Volume Rendering Page

This is an RGBA volume data set downsampled from the Visible Woman

CT Body rendered as a Very Large Image 5440x3k

Cool Embedded Geometry shots

Volume Rendering for 3D GEEKs

VolumePro Timeline - Started as a research project at MERL, then spun out to RTViz and then aquired by TeraRecon. We are working on the 3rd generation ASIC.

H. Pfister, J. Hardenbergh, J. Knittel, H. Lauer, and L. Seiler. The volumepro real-time ray-casting system. In Proceedings of SIGGRAPH 99, pages 251--260, August 1999. MERL TechReport and SIGGRAPH99 Paper DOI=http://doi.acm.org/10.1145/311535.311563

The VolumePro 1000 was described in a paper at I3D by Yin Wu, Hugh Lauer, et al.
Wu, Y., Bhatia, V., Lauer, H., and Seiler, L. 2003. Shear-image order ray casting volume rendering. In Proceedings of the 2003 Symposium on interactive 3D Graphics (Monterey, California, April 27 - 30, 2003). SI3D '03. ACM Press, New York, NY, 152-162. DOI=http://doi.acm.org/10.1145/641480.641510

Emissive Clip Planes for Volume Rendering http://doi.acm.org/10.1145/965400.965502	Cutting thru homogeneous material gives crazy small gradients to confuse viewer.	Placing an emissive cutplane over the noise allows lighting the true surfaces.
SIGGRAPH 2004 Poster		fMRI Visualization
Integrated 3D Visualization of fMRI and DTI Tractography http://doi.ieeecomputersociety.org/10.1109/VIS.2005.58	Good overview shot	Geophysical data is volume data.

Glow rendering is part of TeraRecon Advanced Imaging. It is based on the integration of open source from PBRT, Filament and others. The code has been modified under the direction of the first person I hired onto the VolumePro team, TC Zhao. TC & Vikram Simha developed AqNet, the basis of the TeraRecon business. TC recently retired as CTO & VP of Development. He has a PhD in light transport, which was REALLY useful for understanding the algorithms.

BrainAneurysm w. Glow Rendering

Elbow with Hardware

Notes

Front to Back blending is possible with a buffer to accumulate alpha. The normal back to front blending:

ColorAccum   = (1 - OpacityNew)*ColorAccum + ColorNew
OpacityAccum = (1 - OpacityNew)*OpacityAccum + OpacityNew

Front to Back

ColorAccum   = (1 - OpacityAccum)*ColorNew + ColorAccum
OpacityAccum = (1 - OpacityAccum)*OpacityNew + OpacityAccum

from:
A coherent projection approach for direct volume rendering.
Jane Wilhelms (R.I.P. 2005), Allen Van Gelder: SIGGRAPH 1991: 275-284

Whiz kids wanted. Why are there so few Platonic solids? If you understand the question, let me know.

See ALSO: dtifmri.htm <> emissive.htm <> fmriviz.htm <> fmrivizo.htm <> hips2.htm <> images.htm <> poster02.htm