Motion level of detail : a joint reduction technique for crowd animation = 군중 애니메이션을 위한 관절-제거 기반 동작 단순화 기법 a joint reduction technique for crowd animation

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As computer graphics technology improves, methods for animating scenes with a large number of articulate figures are attracting more attention in movies, games and VR applications. However, an enormous number of characters can hardly be simulated in real-time. Several researchers have tried to improve the performance of animation by using an imagebased 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’ for an articulate figure is proposed, which not only improves the speed of the animation but also conserves the features of the original motion. Research on crowd animation can be classified into two major categories. An approach that focus on offering realism of the crowd motion and another technique that improves the speed of the animation. During the past decade, a wealth of research on realism such as crowd behavior and collision has been presented. Recently, for the sake of GPU evolution, research on improving speed has also received much attention. According to the result of our experiment, we determine that the number of joints have a much greater effect than anticipated on the animation speed. In order to resolve this problem, a new level-of-detail (LoD) technique named ‘motion LoD’ is proposed. Motion LoD is a joint-reduction technique operated in the preprocessing stage. The whole process consists of motion clustering and simplification. At the motion clustering process, motion sequence is analyzed and clustered by using two approaches joint posture clustering (JPC) and mean shift motion clustering. These clustering processes extracts the key postures of a motion and automatically generates the priority of joint reduction. The clustered postures are directly utilized as an initial posture of the proposed motion simplification. At the stage of motion simplification, ...
Advisors
Wohn, Kwang-Yunresearcher원광연researcher
Description
한국과학기술원 : 전산학전공,
Publisher
한국과학기술원
Issue Date
2007
Identifier
268752/325007  / 020005177
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전산학전공, 2007. 8, [ ix, 97 p. ]

Keywords

Crowd animation; Level of detail; Motion optimization; Computer graphics; 군중 애니메이션; 다단계 기법; 동작 최적화; 컴퓨터 그래픽스; Crowd animation; Level of detail; Motion optimization; Computer graphics; 군중 애니메이션; 다단계 기법; 동작 최적화; 컴퓨터 그래픽스

URI
http://hdl.handle.net/10203/33245
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=268752&flag=dissertation
Appears in Collection
CS-Theses_Ph.D.(박사논문)
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