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Constructing MRI-based 3D precise human hand models for product ergonomic assessments
Yasutomo Shimizu,Keisuke Kawaguchi,Satoshi Kanai (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
Since human hands play an important role in grasping and manipulating the product, the digital hand model which can reproduce the structure and the motion of the human hand with high-precision is very useful for virtual ergonomic assessment of the product. The purpose of this study is to develop a new method of MRI-based modeling of a digital hand whose precision is sufficient to reproduce virtual grasp postures for ergonomic assessments. The digital hand has 3D models of the bones and a skin surface extracted from MRI data. The bone link model has 2-DOF finger joint motion which can precisely approximate real motions using ICP algorithm and quaternion interpolation. And a skin surface deformation method can accurately reproduce the skin surface deformation around the ball of the thumb using the combination of traditional SSD (skeletal-subspace deformation) and RBF interpolation. The comparison of the simulated contact area of our hand model with the real one showed the effectiveness of the proposed model.