Browse > Article
http://dx.doi.org/10.15701/kcgs.2021.27.1.1

Deforming the Walking Motion with Geometrical Editing  

Kim, Meejin (Korea Electronics Technology Institute)
Lee, Sukwon (Korea Electronics Technology Institute)
Publication Information
Journal of the Korea Computer Graphics Society / v.27, no.1, 2021 , pp. 1-8 More about this Journal
Abstract
This paper proposes a simple deformation method for editing the trajectory of a walking motion with preserving its style. To this end, our method analyzes the trajectory of the root joint into the graph and deforms it by applying the graph Laplace operator. The trajectory of the root joint is presented as a graph with a vertex defined the position and direction at each time frame on the motion dataThe graph transforms the trajectory into the differential coordinate, and if the constraints are set on the trajectory vertex, the solver iterative approaches to the solution. By modifying the root trajectory, we can continuously vary the walking motion, which reduces the cost of capturing a whole motion that is required. After computes the root trajectory, other joints are copied on the root and post-processed as a final motion. At the end of our paper, we show the application that the character continuously walks in a complex environment while satisfying user constraints.
Keywords
character animation; motion capture data; motion editing; graph Laplacian;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Lipman, O. Sorkine, D. Cohen-Or, D. Levin, C. Rossi, and H.-P. Seidel, "Differential coordinates for interactive mesh editing," in Proceedings Shape Modeling Applications, 2004. IEEE, 2004, pp. 181-190.
2 G. D. Knott, Interpolating cubic splines. Springer Science & Business Media, 2000, vol. 18.
3 E. S. Ho, T. Komura, and C.-L. Tai, "Spatial relationship preserving character motion adaptation," in ACM SIGGRAPH 2010 papers, 2010, pp. 1-8.
4 C. Kang and S.-H. Lee, "Multi-contact locomotion using a contact graph with feasibility predictors," ACM Transactions on Graphics (TOG), vol. 36, no. 4, p. 1, 2017.
5 J. Lee and S. Y. Shin, "A hierarchical approach to interactive motion editing for human-like figures," in Proceedings of the 26th annual conference on Computer graphics and interactive techniques, 1999, pp. 39-48.
6 M. Kim, K. Hyun, J. Kim, and J. Lee, "Synchronized multi-character motion editing," ACM transactions on graphics (TOG), vol. 28, no. 3, pp. 1-9, 2009.
7 Y.-Y. Tsai, W.-C. Lin, K. B. Cheng, J. Lee, and T.-Y. Lee, "Real-time physics-based 3d biped character animation using an inverted pendulum model," IEEE transactions on visualization and computer graphics, vol. 16, no. 2, pp. 325-337, 2009.   DOI
8 J. Lee, J. Chai, P. S. Reitsma, J. K. Hodgins, and N. S. Pollard, "Interactive control of avatars animated with human motion data," in Proceedings of the 29th annual conference on Computer graphics and interactive techniques, 2002, pp. 491-500.
9 H. J. Shin and H. S. Oh, "Fat graphs: constructing an interactive character with continuous controls," in Proceedings of the 2006 ACM SIGGRAPH/Eurographics symposium on Computer animation. Eurographics Association, 2006, pp. 291-298.
10 L. Kovar, J. Schreiner, and M. Gleicher, "Footskate cleanup for motion capture editing," in Proceedings of the 2002 ACM SIGGRAPH/Eurographics symposium on Computer animation, 2002, pp. 97-104.
11 A. Safonova and J. K. Hodgins, "Construction and optimal search of interpolated motion graphs," in ACM SIGGRAPH 2007 papers, 2007, pp. 106-es.
12 J. Hwang, M. Yang, I. H. Suh, and T. Kwon, "Real-time grasp planning based on motion field graph for human-robot cooperation," in 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE, 2016, pp. 1025-1032.
13 S. Levine, J. M. Wang, A. Haraux, Z. Popovic, and V. Koltun, "Continuous character control with low-dimensional embeddings," ACM Transactions on Graphics (TOG), vol. 31, no. 4, pp. 1-10, 2012.
14 K. Lee, S. Lee, and J. Lee, "Interactive character animation by learning multi-objective control," ACM Transactions on Graphics (TOG), vol. 37, no. 6, pp. 1-10, 2018.
15 Y. Lee, K. Wampler, G. Bernstein, J. Popovic, and Z. Popovic, "Motion fields for interactive character locomotion," in ACM SIGGRAPH Asia 2010 papers, 2010, pp. 1-8.
16 M. G. Choi, M. Kim, K. L. Hyun, and J. Lee, "Deformable motion: Squeezing into cluttered environments," in Computer Graphics Forum, vol. 30, no. 2. Wiley Online Library, 2011, pp. 445-453.   DOI
17 S. Lee and S.-H. Lee, "Projective motion correction with contact optimization," IEEE transactions on visualization and computer graphics, vol. 25, no. 4, pp. 1746-1759, 2018.   DOI
18 L. Kovar, M. Gleicher, and F. Pighin, "Motion graphs," in ACM SIGGRAPH 2008 classes, 2008, pp. 1-10.
19 D. Holden, T. Komura, and J. Saito, "Phase-functioned neural networks for character control," ACM Transactions on Graphics (TOG), vol. 36, no. 4, pp. 1-13, 2017.