1. A Sketch-Based Interface for Collaborative Design Zhe Fan 1 Manuel M. Oliveira 2 Chi Ma 1 Arie Kaufman 1 1 Stony Brook University 2 UFRGS 1 Stony Brook University 2 UFRGS

2. Often used in conceptual designOften used in conceptual design Powerful tool for communicating ideasPowerful tool for communicating ideas System prototype elementSystem prototype element –Modeling primitives –User-defined objects Introduction

3. Examples Collaboration by two users A new user’s solo

4. Logically organized in six modulesLogically organized in six modules System Interface Image Manager 3D Manager 2D Manager Floor Manager Interface Library Manager Viewer Manager

5. Top view – floor profileTop view – floor profile Perspective view – exploration in 3DPerspective view – exploration in 3D Floor and Viewer Managers Top view of the scene Perspective view

6. 2D Manager Projecting 2D strokes to 3DProjecting 2D strokes to 3D

7. Sketching on 3D surfacesSketching on 3D surfaces 2D Manager (cont.)

8. Conventional Rendering Sketch-like Rendering Provides 3D primitivesProvides 3D primitives NPR rendering for sketch-like appearanceNPR rendering for sketch-like appearance Imports 3D polygonal meshesImports 3D polygonal meshes 3D Manager

9. Animated billboardsAnimated billboards Textures, background images, imposterTextures, background images, imposter Image Manager Background and textures Imposter: building far away

10. Video 1: Single User

11. Video 2: Collaboration

12. Video 3: Explore the Town Scene

13. Result 1: Baseball field A new userA new user 5 minutes tutorial5 minutes tutorial 50 minutes design50 minutes design TexturesTextures

14. Result 2: Farm Experienced userExperienced user 4 minutes design4 minutes design

15. 2 collaborators2 collaborators Approximately 4 hoursApproximately 4 hours Most time spent on creating textures and planning the designMost time spent on creating textures and planning the design Result 3: Town

16. Other Results

17. Bruce Gooch University of Utah Greg Coombe University of North Carolina at Chapel Hill Peter Shireley University of Utah Artistic Vision: Painterly Rendering Using Computer Vision Techniques

18. Example

19. Algorithm Segmentation and Smoothing Ridge Set Extraction Ridge Set Tokenizing and Grouping Rendering Images

20. Algorithm Segmentation and Smoothing Ridge Set Extraction

21. Algorithm Ridge Set Tokenizing and Grouping Rendering Images Moment tokens Line Lists

22. User-directed Enhancement

23. Segmentation Levels Level 12, 48, 72, 150

24. Brush Artifact Level 10 percent 40 percent 70 percent 100 percent

25. Results

26. Curve Analogies Aaron Hertzmann 1 Nuria Oliver 2 Brain Curless 1 Steven M. Seitz 1 1 University of Washington 2 Microsoft Research

27. Polyline Represent each curve as a polyline Interpolation

28. Algorithm The general problem statement Curve synthesis with constraints Randomly generating a B’ curve in the style of an A’ curve. Synthesize a shape according to some constraints. Curve Analogies

29. Results

30. Results

31. A Suggestive Interface for 3D Drawing Takeo IgarashiJohn F. Hughes Computer Science Department Brown University

32. User Interface Drag and Selection

33. User Interface The prediction mechanism

34. User Interface Cutting

35. Suggestions (1)

36. Suggestions (2)

37. Results

38. Surface Drawing Steven SchkolnePeter Schroder Caltech Department of Computer Science Technical Report CS-TR-99-03 :

39. Surface Drawing

40. Surface Construction

41. Interface

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