Optimized motion simplification for crowd animation
Optimized motion simplification for crowd animation
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DOI：
10.1002/cav.119
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发表时间：
2006-07-01
影响因子：
1.1
通讯作者：
Wohn, Kwangyun
中科院分区：
文献类型：
--
作者：
Ahn, Junghyun;Oh, Seungwoo;Wohn, Kwangyun
在实时应用程序中模拟大量清晰的人物是角色动画中具有挑战性的研究课题之一。一些研究人员尝试使用基于图像的技术（例如“impostor”）来提高动画的性能。这种方法提高了动画的速度；然而，与运动相关的准确性、记忆性和交互性问题仍有待解决。在这方面，提出了一种用于清晰人物的“运动简化”框架，它不仅提高了动画的速度，而且保留了原始运动的特征。首先，使用均值漂移聚类分析运动序列，以提取关键姿势并自动生成关节缩减的优先级。这些运动分析结果直接用作所提出的姿势优化的输入。应用最小二乘法来最小化原始姿势和简化姿势之间的误差。最后，展示了如何在实时应用中应用所提出的简化运动而不降低场景的视觉质量。实验结果表明，所提出的运动简化可以成功地应用于实时动画系统。版权所有 (c) 2006 John Wiley & Sons, Ltd.
Simulating a huge number of articulate figures in a real-time application is one of the challenging research topics in character animation. Several researchers have tried to improve the performance of animation using the image-based technique such as 'impostor.' This method improved the speed of the animation; however, the accuracy, memory, and interactivity problems related to motion remain to be resolved. In this regard, a 'motion simplification' framework for an articulate figure is proposed, which not only improves the speed of the animation but also conserves the features of the original motion. First, the motion sequence is analyzed using mean shift clustering for the purpose of extracting key postures and automatically generating the priority of joint reductions. These motion analysis results are directly utilized as the input of the proposed posture optimization. The least square method is applied in order to minimize the error between the original and the simplified posture. Finally, how to apply the proposed simplified motion in a real-time application without decreasing the visual quality of the scene is shown. The experimental result shows that the proposed motion simplification can be successfully applied in a real-time animation system. Copyright (c) 2006 John Wiley & Sons, Ltd.