1 / 26

Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee

Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee. Niels Mulder & Floris de Vries. Overview. Goal: Creating a (context-free) grammar to describe and animate basketball. Motion grammar Multi-Level Markov Chain Monte Carlo Tactic board. Related work.

cordelia
Download Presentation

Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee Niels Mulder & Floris de Vries

  2. Overview Goal: Creating a (context-free) grammar to describe and animate basketball. • Motion grammar • Multi-Level Markov Chain Monte Carlo • Tactic board

  3. Related work

  4. Constrained optimization Gleicher, M. (1998, July). Retargetting motion to new characters. In Proceedings of the 25th annual conference on Computer graphics and interactive techniques (pp. 33-42). ACM. Kim, M., Hyun, K., Kim, J., & Lee, J. (2009). Synchronized multi-character motion editing. ACM transactions on graphics (TOG), 28(3), 79.

  5. Data structures Lee, J., Chai, J., Reitsma, P. S., Hodgins, J. K., & Pollard, N. S. (2002, July). Interactive control of avatars animated with human motion data. In ACM Transactions on Graphics (ToG) (Vol. 21, No. 3, pp. 491-500). ACM. Beaudoin, P., Coros, S., van de Panne, M., & Poulin, P. (2008, July). Motion-motif graphs. In Proceedings of the 2008 ACM SIGGRAPH/Eurographics Symposium on Computer Animation (pp. 117-126). Eurographics Association.

  6. Continuous optimization and combinatorial planning integration Lee, Y., Wampler, K., Bernstein, G., Popović, J., & Popović, Z. (2010, December). Motion fields for interactive character locomotion. In ACM Transactions on Graphics (TOG) (Vol. 29, No. 6, p. 138). ACM.

  7. Motion patches Kim, M., Hwang, Y., Hyun, K., & Lee, J. (2012, July). Tiling motion patches. In Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation (pp. 117-126). Eurographics Association.

  8. Human action grammar Park, J. P., Lee, K. H., & Lee, J. (2011, December). Finding syntactic structures from human motion data. In Computer Graphics Forum (Vol. 30, No. 8, pp. 2183-2193). Oxford, UK: Blackwell Publishing Ltd.

  9. Grammars

  10. Motion Grammar

  11. Motion Grammar Instantiation Semantics Plausability

  12. Motion Grammar Instantiation Semantics Plausability

  13. Motion Grammar Instantiation Semantics Plausability

  14. Tactic Board

  15. Probability distribution

  16. Multi-Level Markov Chain Monte Carlo

  17. Markov Chain Monte Carlo Markov Chain Monte Carlo

  18. Algorithm Metropolis-Hastings

  19. Random walks Motion clips • Random clips Parse tree subtree • Mean probability of error of children

  20. Parallel Tempering Conversion speed Jump size <> Local extrema frequency

  21. Critical Analysis

  22. The Good • Novel idea • Good explanation of some the background • Structure • Good balance of terminology and expertise • Pseudo-code, appendix

  23. The Bad • Slow • Use cases unclear • Language structure • Weird setup difference • Figure (log but no log?) • Self-praising without actually testing

  24. Future Work • Inferring motion grammars automatically • Practical implementation of combination of frameworks • Bringing it to real-time

  25. ?

More Related