Transcript Baoquan Chen

Volume Graphics: What’s in the
Cards
Baoquan Chen
Department of Computer Science and Engineering
University of Minnesota Twin Cities
http://www.cs.umn.edu/~baoquan
Historical Perspective - 70’s–Early 80’s
1970
First report - 3D oscilloscopic images
1970's Medical imaging
1978
3D surface presentation [Sunguroff&Greenberg]
1979
1981
1982
Cuberille [Herman & Liu]
Depth only shading [Herman & Udupa]
Octree machine [Meagher]
Voxel processor [Goldwasser et al.]
Ray casting [Tuy & Tuy]
Cube-1 architecture [Kaufman et al.]
Back-to-front & Front-to-back,
Depth gradient shading [Gordon et al.]
Contextual shading [Chen et al.]
1984
1985
Historical Perspective - Late 80’s
1986 3D scan conversion [Kaufman & Shimony]
Grey-level shading [Hoehne & Bernstein]
1987 Marching cubes [Lorensen & Cline]
NSF ViSC Report
1988 Volume rendering [Levoy; Drebin et al;
Upson & Keeler; Sabella]
Dividing Cubes [Cline et al.]
1989 Splatting [Westover]
Historical Perspective- The 90’s-00’s
1989, 1990 – 04 Biannual VolVis Symposia
1990 – 05
Visualization Conference
1995 – 05
Information Visualization
Symposia
1996
ONR Volume Graphics
Workshop
1999,01,03,05 Volume Graphics Workshops
2004
NIH/NSF VRC’04
A Summary of the Status
• Lots of papers
• Volume visualization a commodity
• Some commercial visualization systems
• Cheers!
Is/Does Paul Happy/Care?
Paul Woodward, Astronomy, U. Minnesota
A Few Points to Ponder
1. Design of Volume Visualization
− Exploration vs. Presentation? Avoid 3D!
[Bordoloi & Shen, Vis 2005]
Interaction/Animation Harmful
A Few Points to Ponder
1. Design of Volume Visualization
− Exploration vs. Presentation? Avoid 3D!
− Simple, Concise, Clear
Clutter and Confusion are failures
Illustrators
are
paid
to
remove
of design, not attributes of
visual
information
–
Patrick Lynch
information – Edward Tufte
Image removed due to copyright concern
Respect Lines
[Yuan & Chen, VisSym 2004]
A Few Points to Ponder
1. Design of Volume Visualization
− Exploration vs. Presentation? Avoid 3D!
− Simple, Concise, Clear
− Small or large data
High Dynamic Range Volume Rendering
[Yuan, Nguyen & Chen, Vis 05]
2048^3 homogenous decaying compressible fluid turbulence
A Few Points to Ponder
1. Design of Volume Visualization
−
−
−
−
Exploration vs. Presentation? Avoid 3D!
Simple, Concise, Clear
Small or large data
Visualization vs. InfoVis or Data mining
or other data analysis
A Few Points to Ponder
2. Human-Visualization Interface
− Virtual vs. Real/physical metaphor
A Few Points to Ponder
2. Human-Visualization Interface
− Virtual vs. Real/physical metaphor
− 3D vs. 2D
Sketch-based Lighting Design
[Shesh & Chen, 2005]
Sketch-based Lighting Design
Sketch-based Volume Cutout
Sketch-based Volume Cutout
Sketch-based Volume Cutout
A Few Points to Ponder
3. Evaluation of Volume Visualization
− Benchmarks
(datasets, tasks, use case)
− Based on perception and cognitive science
− Demonstrated utility
− Usability
− Range of devices and network speed
− Visual impairments
− Range of cognitive skills
− Novice users, etc.
− Measuring insight/knowledge gained
− Excellent discussions in [van Wijk, Vis 05]
Image removed due to copyright concern
Truth
& beauty