Layered construction for deformable animated characters

Chadwick, Jason; Haumann, David; Parent, Rick

doi:10.1145/74333.74358

Cited by 202 publications

(93 citation statements)

References 26 publications

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“…This process is similar to a study by Chadwick et al (1989) who used a hierarchical approach consisting of muscle FFD constrained by a skeletal frame, used to generate skin deformation for animation. The process is highlighted for the SM muscle and then repeated for the GT later.…”

Section: Background and Previous Workmentioning

confidence: 96%

A cerebral palsy assessment tool using anatomically based geometries and free-form deformation

Fernandez

Walt

et al. 2005

Biomech Model Mechanobiol

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A geometrical analysis tool for investigating muscle length change in cerebral palsy (CP) patients is presented. A subset of anatomically based geometries from the International Union of Physiological Sciences (IUPS) Physiome Project is used, which is derived from the visible human (VH) data set with muscle attachment information, and customised using volume-preserving free-form deformation (FFD), the 'host-mesh' technique. The model's intended use is to provide pre- and post-surgery assessment for muscle lengthening, a surgery performed to help slacken tight muscles and improve gait. The model is illustrated using healthy patient data from motion capture as a validation followed by three CP case studies to highlight its use. The methodology is presented in three stages, (1) a FFD of the complete lower limb, (2) a focused geometric study on the semimembranosus (SM) and gastrocnemius (GT) muscles, and (3) an improved hybrid mechanics-FFD approach as an improvement for future analysis, with differentiation between muscle and tendon lengthening, and contact detection between sliding muscles. Finally, the issues, limitations, in particular with the marker system, and model improvements are discussed.

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Section: Background and Previous Workmentioning

confidence: 96%

A cerebral palsy assessment tool using anatomically based geometries and free-form deformation

Fernandez

Walt

et al. 2005

Biomech Model Mechanobiol

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“…It is also used for skeleton-driven deformations and physically based rigging of deformable characters [18,20,21]. Mass-spring system was initially used for facial modelling, skin, fat and muscle simulation but now it is also used for interactive animation of structural deformable objects [22,23,24,25,26]. In order to simulate large mass-spring systems in real time, a GPU has been developed and implemented to stimulate the elongation and compression of spring on the graphics card and gives deformed surfaces [28].…”

Section: B Physics Based Techniquesmentioning

confidence: 99%

Character Skin Deformation: A Survey

Chaudhry

You

Zhang

2010

2010 Seventh International Conference on Computer Graphics, Imaging and Visualization

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Skin deformation plays a very important role in creating realistic character animation. A lot of research efforts have been devoted to the development of skin deformation techniques. The paper provides a survey of various techniques and classify them into three major categories; surface-based, volume-based and curve-based techniques. Surface based techniques are divided into purely geometric and physics-based. Volume-based techniques are grouped into purely geometric, anatomy based, and physics-based. Curve-based techniques are classified as free form deformation, purely geometric sweep deformation, cross section method; physics based sweep deformation, static curve-based skin deformation, and dynamic curve-based skin deformation. For each group, a representative technique is introduced. The strengths and weaknesses of each technique are analysed. Finally, some future research directions are discussed.

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“…Skeleton layer, muscle layer, and skin layer are the most common ones. This layered modeling technique is heavily used in human modeling field of computer graphics [3]. In this approach, motion control techniques are applied on the skeleton layer and the other layers move and deform accordingly.…”

Section: Kinematicsmentioning

confidence: 99%

Motion Control for Realistic Walking Behavior using Inverse Kinematics

Memişoğlu

Güdükbay

Özgüç

2007

2007 3DTV Conference

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This study presents an interactive hierarchical motion control system for the animation of human figure locomotion. The articulated figure animation system creates movements using motion control techniques at different levels, like goaldirected motion and walking. Inverse Kinematics using Analytical Methods (IKAN) software, developed at the University of Pennsylvania, is utilized for controlling the motion of the articulated body.

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Layered construction for deformable animated characters

Cited by 202 publications

References 26 publications

A cerebral palsy assessment tool using anatomically based geometries and free-form deformation

A cerebral palsy assessment tool using anatomically based geometries and free-form deformation

Character Skin Deformation: A Survey

Motion Control for Realistic Walking Behavior using Inverse Kinematics

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