1. Interactive Rendering Techniques for
Highlighting in 3D Geovirtual Environments
Matthias Trapp, Christian Beesk, Sebastian Pasewaldt, Jürgen Döllner
Hasso-Plattner-Institut, University of Potsdam, Germany
5th
3D GeoInfo Conference :: 3.-4. November 2010 :: Berlin, Germany

2. Motivation
 Highlighting:
A. Navigation and orientation
B. Express semantic relations
C. Express importance of objects
 Challenges:
 Complex 3D data
 Interactive and scalable
 Object vs. area highlighting
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3. Related Work
Highlighting Techniques to Support Geovisualization, Robinson TR
2006
Semantic Depth-of-Field, Kosara (various)
Directing Gaze in 3D Models with Stylized Focus, Cole et al. EGSR 20063

4. Highlighting techniques
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5. Image-based Rendering Technique
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6. Manual Masking
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 3D proxy objects to indicate areas to highlight
 2D screen aligned lenses

7. Examples: Simple color overlay
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8. Examples: Vignetting
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9. Examples: Outlines
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10. Examples: Semantic Depth-of-Field
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11. Examples: Combinations
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12. Problems & Limitations
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FAIL!

13. Problems & Limitations
 Occlusion (A, C)
 Insufficient distance cues (E)
 Varying camera orientations and projections
 Perspective foreshortening
 Color overlay falsifies facade information
 “smart” highlighting techniques?
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14. Wrap-Up
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 Real-time rendering techniques
 Various applications
 User studies required
 Potential for future work

15. Thank you…
Contact:
Matthias Trapp
matthias.trapp@hpi.uni-potsdam.de
Sebastian Pasewaldt
sebastian.pasewaldt@hpi.uni-potsdam.de
Computer Graphics Systems Group
www.hpi.uni-potsdam.de/3d
Researchgroup 3D-Geoinformation
www.3dgi.de
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