I. Introduction
Tracking the surface deformations of soft tissues (e.g. skin, and breast) can be used to help in investigations of tissue properties. The biomechanical properties of skin have been studied extensively for various applications [1] [2], and computational modelling of skin was used to assist in studying wrinkling [3], simulating stretching and compression of skin for animations [4], simulating plastic surgery [5], and in the design of high-performance clothing [6].