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Individualized Avatars with Complete Anatomy: Repositioning of Superficial Anatomy

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Technical Report

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U.S. Army Research Institute of Environmental Medicine Natick United States

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This study investigated methods for rapidly repositioning the 3D finite element FE representations of Individualized Avatar with Complete Anatomy IAVCA recently developed. Repositioning posed three distinct challenges 1 each individualized avatar has a unique surface and FE structure 2 user expectation is for rapid execution and 3 the repositioning of avatar superficial anatomy is expected to be accompanied by the repositioning of internal organs, musculature and skeleton during natural human movement. Herein, we developed a systematic approach for repositioning of the superficial anatomy with nominal concomitant repositioning of internal anatomy. Initially, a skeleton model is created using an open-source biomechanical tool, OpenSim, to ensure the biofidelity of posing. Our approach then employs an innovative morphing method that combines radial basis functions-based mesh morphing with linear blend skinning to treat excessive soft tissue deformations due to large joint motion. Case study results show that avatars can be rapidly repositioned with natural shaping of superficial anatomy using this approach.

Subject Categories:

  • Medicine and Medical Research

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