1. Modeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping Speaker: Alvin Date:2/16/2004From:PG03

2. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 2 Outline Introduction Introduction Relate Work Relate Work Framework Framework Result Result Conclusion Conclusion

3. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 3 Introduction To reduce the number of poses while maintaining the quality of the modeling and animation. To reduce the number of poses while maintaining the quality of the modeling and animation. Use ellipsoids as a natural geometric primitive. Use ellipsoids as a natural geometric primitive. A sweep-based technique for human body. A sweep-based technique for human body. Use a displacement map to find the original surface from the approximate base surface. Use a displacement map to find the original surface from the approximate base surface.

4. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 4 Relate Work Layered Modeling Layered Modeling Geometric approximations. Geometric approximations. Anatomy-based Modeling Anatomy-based Modeling Precise representation. Precise representation. High computational cost. High computational cost. Example-based Modeling Example-based Modeling Using measured data. Using measured data. Range scanning or motion capture. Range scanning or motion capture.

5. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 5 Framework

6. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 6 Skeleton Construction Feature points Joint Skeleton

7. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 7 Ellipsoid Fitting & Interpolation Partition the data points into disjoint sub-volumes. The interior volume is approximate by key ellipsoids. Ellipsoids with their major axes parallel to the coordinate axes. Only interpolate the center positions and scale factors.

8. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 8 Base Surface Generation

9. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 9 Construction of the Displacement Map A smooth displacement map can be obtained by interpolating the sampled discrete displacement values.

10. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 10 Deformation

11. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 11 Deformation

12. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 12 Deformation

13. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 13 Result

14. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 14 Result

15. Alivn/GAME LAB/CSIE/NDHUModeling and Deformation of Arms and Legs Based on Ellipsoidal Sweeping 15 Conclusion A new approach for modeling arms and legs from data corresponding to a single pose. A new approach for modeling arms and legs from data corresponding to a single pose. These body parts are reconstructed into a layered structure. These body parts are reconstructed into a layered structure. Greatly simplify the computation of sweep surface. Greatly simplify the computation of sweep surface. Future work will address issues of computational problems. Future work will address issues of computational problems.