1. 2D Animation Techniques for 3D Animation Research - KCGS Conference. Spring, 2003 - In-Kwon Lee Game Animation Center Division of Media Ajou University

2. Copyright by In-Kwon Lee 20032 Outline Introduction Traditional 2D Animation in Recent Computer Graphics Researches (Some) Traditional 2D Animation Techniques Discussion

3. Copyright by In-Kwon Lee 20033 Why this course? (1) Group 1 –Toy Story 1 –Antz –Bugs Life –Toy Story 2 –Monsters Inc. –Shrek Group 2 –Final Fantasy

4. Copyright by In-Kwon Lee 20034 Why this course? (2) Traditional 2D Animation Techniques –More than 80 years (1920 ~ ) –Not photorealistic but interesting! Analyzing and Applying 2D Animation Techniques into 3D Animation Research.

5. Copyright by In-Kwon Lee 20035 2D Animation in Recent Researches Introduction Implicit Surface View-Specific Distortion Cartoon Capture Cell Animation From Video Simulating Physics Facial Animation

6. Copyright by In-Kwon Lee 20036 John Lasseter John Lasseter, “Principles of Traditional Animation Applied to 3D Computer Animation,” SIGGRAPH 87. –11 principles in traditional 2D animation techniques

7. Copyright by In-Kwon Lee 20037 Implicit Surface (1) Agata Opalach, Steve Maddock, “Disney Effects Using Implicit Surfaces”, Eurographics Workshop on Animation and Simulation, 1994.

8. Copyright by In-Kwon Lee 20038 Implicit Surface (2) Model

9. Copyright by In-Kwon Lee 20039 Implicit Surface (3) Model with Script

10. Copyright by In-Kwon Lee 200310 Implicit Surface (4) Motion

11. Copyright by In-Kwon Lee 200311 Implicit Surface (5) Fleshes –In [max, min] from parent flex link primitives. –In [max, min] from other fleshes. –Dynamic change of flesh velocity

12. Copyright by In-Kwon Lee 200312 Implicit Surface (6) Squash and Stretch

13. Copyright by In-Kwon Lee 200313 Implicit Surface (7)

14. Copyright by In-Kwon Lee 200314 Implicit Surface (8) Discussion –Varying-length skeleton –Is it really cartoon style?

15. Copyright by In-Kwon Lee 200315 View-Specific Distortion (1) Paul Rademacher, “View-Dependent Geometry”, SIGGRAPH 99.

16. Copyright by In-Kwon Lee 200316 View-Specific Distortion (2)

17. Copyright by In-Kwon Lee 200317 View-Specific Distortion (3)

18. Copyright by In-Kwon Lee 200318 View-Specific Distortion (4)

19. Copyright by In-Kwon Lee 200319 View Specific Distortion (5)

20. Copyright by In-Kwon Lee 200320 View Specific Distortion (6) Discussion –First trial to exploit “distortion” of 2D animation into 3D animation. –Concentrated on “Shape” but not “Motion”

21. Copyright by In-Kwon Lee 200321 Cartoon Capture (1) Bregler et. al, “Turning to the Masters: Motion Capturing Cartoons,” SIGGRAPH 2002.

22. Copyright by In-Kwon Lee 200322 Cartoon Capture (2) Cartoon capture –Extracting motion from traditional animation Cartoon retargetting –Reuse the motion for other characters

23. Copyright by In-Kwon Lee 200323 Cartoon Capture (3) Challenges –No Marker for motion capture –Low frame rate –Limb location? –Retargetting: How?

24. Copyright by In-Kwon Lee 200324 Cartoon Capture (4)

25. Copyright by In-Kwon Lee 200325 Cartoon Capture (5) video

26. Copyright by In-Kwon Lee 200326 Cell Animation From Video (1) Aseem Agarwala, “Snake Toonz: A Semi-Automatic Approach to Creating Cel Animation from Video,” NPAR 2002.

27. Copyright by In-Kwon Lee 200327 Cell Animation From Video (2) Video 1 Video 2

28. Copyright by In-Kwon Lee 200328 Simulating Physics Stephen Chenney, “Simulating Cartoon Style Animation”, NPAR 2002. Simple interpolation of deformation

29. Copyright by In-Kwon Lee 200329 Research in Ajou Univ. Facial Animation –Dongsun Kim et. al (2003) –Component Classification –Automatic Detection of Anticipation Expression –Video

30. Some 2D Animation Techniques

31. Copyright by In-Kwon Lee 200331 Extremes and Inbetweens (1) extreme  slow out  fast move  slow in  extreme

32. Copyright by In-Kwon Lee 200332 Extremes and Inbetweens (2)

33. Copyright by In-Kwon Lee 200333 Top-Down (1)

34. Copyright by In-Kwon Lee 200334 Top-Down (2)

35. Copyright by In-Kwon Lee 200335 Top-Down (3)

36. Copyright by In-Kwon Lee 200336 Top-Down (4)

37. Copyright by In-Kwon Lee 200337 Top-Down (5)

38. Copyright by In-Kwon Lee 200338 Arc

39. Copyright by In-Kwon Lee 200339 More on Squash and Stretch (1)

40. Copyright by In-Kwon Lee 200340 More on Squash and Stretch (2)

41. Copyright by In-Kwon Lee 200341 More on Squash and Stretch (3)

42. Copyright by In-Kwon Lee 200342 Elongated Inbetweens

43. Copyright by In-Kwon Lee 200343 Walking (1)

44. Copyright by In-Kwon Lee 200344 Walking (2) Double Bounce

45. Copyright by In-Kwon Lee 200345 Walk (3)

46. Copyright by In-Kwon Lee 200346 Walk (4)

47. Copyright by In-Kwon Lee 200347 Walk (5)

48. Copyright by In-Kwon Lee 200348 Walk (6)

49. Copyright by In-Kwon Lee 200349 Walk (7)

50. Copyright by In-Kwon Lee 200350 More on Inbetweening

51. Copyright by In-Kwon Lee 200351 Overlapping Action in the Face

52. Copyright by In-Kwon Lee 200352 Weight

53. Copyright by In-Kwon Lee 200353 Anticipation (1)

54. Copyright by In-Kwon Lee 200354 Anticipation (2)

55. Copyright by In-Kwon Lee 200355 Anticipation (3)

56. Copyright by In-Kwon Lee 200356 Whip Action (1)

57. Copyright by In-Kwon Lee 200357 Whip Action (2)

58. Copyright by In-Kwon Lee 200358 Whip Action (3)

59. Copyright by In-Kwon Lee 200359 Conclusion Analyzing & Collecting & Simplifying Heuristic Rules Physics –Can be a tool –Exact? Exaggerations

60. Copyright by In-Kwon Lee 200360 More References

61. Copyright by In-Kwon Lee 200361 Thank You. 이 presentation file 은 아래에서 down 가능합니다. http://media.ajou.ac.kr/~iklee/Publication.html