Motion Compression using Principal Geodesics Analysis Project webpage [Tech Report]
We present a novel compression method for human motion data using PGA (Principle Geostatic Analysis). Our method reaches high compression ratios (>60:1) while maintaining good reconstruction quality. To be presented at Eurographics 2009.
Interactive Character Posing from Large Motion Database Project webpage [Tech Report]
We present NAT-IK, a new inverse kinematics scheme which is able to interactively generate natural poses in a large human-reachable space. NAT-IK employs an adaptive kd-clustering algorithm to select a representative frame-set from a large motion database and a sparse approximation algorithm to accelerate the training and posing processes. The model training process only needs to be done once. The training results contain 30MB data which can be conveniently imported into existing animation packages. NAT-IK first makes it possible to generate natural poses in a very large human-reachable space robustly and interactively. In ACM SIGGRAPH / Eurographics Symposium on Computer Animation Poster Proceedings, 2008
DL-STDM: A Robust Watermarking Scheme for Motion Data
We propose a double-layer STDM watermarking framework and verify it on 1000 motion clips. Experimental results demonstrate that it is more robust than existing methods, including Kim's method and standard STDM.
[PDF] (Computers & Graphics, 32(3), pp 320-329, 2008)
A 12-DOF Analytic Inverse Kinematics Solver for Human Motion Control
One of the fastest IK solver for 12-DOF chain of human-like figure. It provides closed-form solutions to multi-constrained IK problem. It is rather stable and easy to implement. But it only works for human-like figures.
Technical Report: [PDF]
Paper Published in JOICS: [PDF]
Demo: [MP4]
On-line Motion Style Transfer
The “stride” style of
a walking motion (middle) was transfered to a running motion (top), producing a
“stride running” motion (bottom) within 300 miliseconds.
Paper Published by Springer LNCS (ICEC '06): [PDF]
Demo: [MP4]
[ Errata]
Template-Model Based Modeling and Animation of Human Bodies with Anatomical Structure
Given a designed skin mesh, the template model consisting of bones and muscles can be semi-automatically deformed according to the shape of the mesh. This techniques can decrease the workload of animators who want to generate anatomically plausible skin deformations.
Paper presented at CASA 2005: [PDF]
Demo: [MP4]
State of the Art of the Research on Human-Body Modeling and Skin Deformation in Computer Animation
计算机动画中人体建模与皮肤变形技术的研究现状与展望
Paper published in Chinese J. Image & Graphics: [PDF] (in Chinese)