1. Automated generation of control skeletons for use in animation Author ： Lawson Wade, Richard E. Parent Source ： The Visual Computer (2002) 18:97-110 Speaker ： Jhen-Yu Yang Advisor ： Ku-Yaw Chang

2. Outline Introduction Method Results Conclusion 2012/10/16 2

3. Introduction Generating a control skeleton 2012/10/16 3 The skeletal graph for the horse The 3D model of the horse

4. Outline Introduction Method Results Conclusion 2012/10/16 4

5. Method Voxelization ▫Voxelized representation Distance map construction ▫Euclidean distance 2012/10/16 5 A 2D Euclidean distance map for an animal-shaped

6. Method Medial surface extraction 2012/10/16 6 DMS of a horse A medial axis in 2D (a and b) and a medial surface in 3D (c)

7. Method Path tree generation 2012/10/16 7 Forming path-tree extension

8. Method Smooth the path tree 2012/10/16 8

9. Method Control skeleton construction 2012/10/16 9

10. Outline Introduction Method Results Conclusion 2012/10/16 10

11. Results 2012/10/16 11 Control skeleton for a human figure

12. Results 2012/10/16 12 Control skeleton for an octopus Control skeleton for a jellyfish

13. Outline Introduction Method Results Conclusion 2012/10/16 13

14. Conclusion Produce a reasonably good control skeleton in 1 or 2 min on a low-end PC It does not work very well for objects with holes ▫doughnut 2012/10/16 14

15. The End Thanks 2012/10/16 15