HACS: Hand Action Coding System for anatomy-based synthesis of hand gestures

Previously (H.S. Horace et al., 1997), we presented an anatomy based hierarchical model for hand motion simulation. We present a hand gesture coding system which we called Hand Action Coding System (HACS). It is an extension of our previous work. With HACS, the simulation allows specification of hand motion in a high level manner. The underlying computational complexities of motion simulation are separated from the high level motion descriptions. When humans want to perform some hand functions or hand gestures, the brain gives instructions and activates the corresponding hand muscles. HACS codifies hand gestures in terms of these hand muscle action units (HAU). When combined with our anatomy based hand model, HACS eases the specification of complex hand gestures/motion animation sequence