Interactive Spectral Volume Rendering

Steven Bergner, Torsten Möller, Mark S. Drew, Graham D. Finlayson
related sites: GRUVI-Lab at SFU, People at UEA Norwich, CV Group at University of Magdeburg

The supplementary material presented here provides some full-res images in addition to the ones used in the paper.

The video is a compressed version (DivX-5) of the one available on the conference DVD.

Engine

 
eng1.png

eng2.png

eng3.png

eng4.png

Four different impressions of the engine rendered using the technique described in the paper. When moving the slider from one light source to an other, no repeated raycasting takes place. This is only done once in the beginning. The re-lighting is an image based operation and can thus be done at interactive framerates.

The materials used in the dataset illustrate the use of

metamerism (internal part beeing green like the block)
colour constancy (the block keeps its colour under all four lights)
metameric blacks (the 'smoke' kind of disappears when it becomes black)

Frog


frog1.png

frog1off.png

frog2.png

frog3.png

frog4.png

The frog dataset is another example using the same concepts as described above.

UNC-brain


brain1.png

brain2.png

brain3.png

brain12.png

brain13.png

brain23o1.png

brain23.png

brain123.png

Three different intensity ranges of this dataset ('skin', brain, and bone) have been marked using three different material. The lights have been designed to have only one material appear while the other stay black. A linear combination of lights results in a mixture of visible segments. The filenames indicate single lights or mixtures.