Two-Character Motion Analysis and Synthesis

Abstract

Abstract-In this paper, we deal with the problem of synthesizing novel motions of standing-up martial arts such as Kickboxing, Karate, and Taekwondo performed by a pair of humanlike characters while reflecting their interactions. Adopting an example-based paradigm, we address three nontrivial issues embedded in this problem: motion modeling, interaction modeling, and motion synthesis. For the first issue, we present a semiautomatic motion-labeling scheme based on force-based motion segmentation and learning-based action classification. We also construct a pair of motion transition graphs, each of which represents an individual motion stream. For the second issue, we propose a scheme for capturing the interactions between two players. A dynamic Bayesian network is adopted to build a motion transition model on top of the coupled motion transition graph that is constructed from an example motion stream. For the last issue, we provide a scheme for synthesizing a novel sequence of coupled motions, guided by the motion transition model. Although the focus of the present work is on martial arts, we believe that the framework of the proposed approach can be conveyed to other two-player motions as well.

Strategy and Skill Learning for Physics-based Table Tennis Animation

“…Our system is designed for table tennis games, involving two players (i.e., agents). Two or more agents have been created primarily with kinematic approaches [Kwon et al 2008;Liu et al 2006;Shum et al 2008Shum et al , 2012Wampler et al 2010]. There exist two recent approaches [Won et al 2021;] demonstrating examples of physically simulated boxing.…”

Authoring Virtual Crowds: A Survey

“…However, these mostly focus on one character at a time and have not been easily extended to crowds so far. Some work has been done for small groups of two-three characters (e.g., [SKY07,KCPS08]). Recent work Starke et al [SZZK21] develops a learning-based method for a two-person martial arts simulation, achieving high-quality results and allowing control over the affected body parts.…”

Therapeutic efficacy of Schistosoma japonicum cystatin on sepsis-induced cardiomyopathy in a mouse model

“…A S a fundamental yet challenging task in computer animation, human motion synthesis brings broad applications into the real world. Given various control signals, such as natural language description [12], [20], [24], [37], [48], voice or music audio [2], [12], [27], [28], [29], a synthesis algorithm enables a machine to generate realistic and diverse 3D human motions from these condition inputs, benefiting VR content design, game and film creation, etc [4], [15], [17], [26], [47], [50]. Its overall strategy is to learn a powerful cross-modal mapping function that effectively converts the latent distribution of control commands into the human motion domain.…”