Individualized Avatars with Complete Anatomy: Repositioning of Superficial Anatomy
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2020
- Accession Number
- AD1095719
Entities
People
- Diana P. Sanford
- Gary P. Zientara
- James Yang
- Jingwen Hu
- Reed W. Hoyt
- Zhiqing Cheng
Organizations
- United States Army Research Institute of Environmental Medicine