1. 3-D cs5984: Information Visualization Chris North

2. Last Week Virtual Environments 3-D manipulation, navigation, immersion Scientific Visualization Data Flow? Peripheral Displays Primary and secondary tasks, attention

3. Today DeFanti, “Scientific Visualization”, pg 39 Sayle, “Rasmol”, web » Yuying, Matt

4. 3-D Data Vector/Polygonal surface data Polygons approximate surfaces of 3D objects Paint textures on surfaces E.g: Rasmol, Quake Navigation: Move camera Move objects 6 dof: –3 rotation –3 translation

5. 3-D Data Voxel volume data Fully sampled contents of 3D objects Voxel = 3D pixel; point in a 3D image E.g: Visible Human, MRI, CaT scan Visible Human »slice and photograph MRI & CaT: »Measures tissue density at each point in space Navigation? 2-D: 3-D:

6. Slicing Visible Human Explorer (north et al) Video? Demo?

7. Slice and Dice

8. Image Segmentation Determine physical structures within volume Manual Image processing Generate surfaces

9. Image Segmentation Voxel-Man Hamburg University http://www.uke.uni-hamburg.de/institute/imdm/idv/vm3dn/io_thorax.en.html

10. Transparency Reduce occlusion problem http://www.uke.uni-hamburg.de/institute/imdm/idv/vm3dn/io_xray_combined.en.html

11. 3-D data: Digital Video 3D: Stack 2D video frames time x y

12. Slicing Digital Video Red’s Nightmare video in VHE Full overview: time zoom Scene change still credits motion Pan left

13. Assignment Read for Thurs: Workspaces Gelernter, “LifeStreams”, web » fanye, luhui Robertson, “Task Gallery”, web » priya, dilshad Read for Tues: Construction Hibino, “InfoStill”, web » gowri, joy Haeberli, “Data Flow”, web » ajay, denzil

14. Future O+D vs. F+C 2D vs. 3D Project presentations start in 2 weeks! Last 2 days of class, 2 hours/class 10 min talk (5 slides), demo, paper draft Final paper: may 7 CAVE tour now (torg 3050)