Correction Method for Spine Flexion Tracking with Markers

The aim of the present paper is to accomplish a virtual model for testing the properties of the outer layers of the human body (skin, adipose tissue, muscle) in order to estimate and calculate the displacements of certain points on the skin surface in relation to the bones (which are considered fixed points). The proposed correction method will be used in the development of a device for tracking the human body postures and the spine movement by using different types of sensors for establishing a preliminary diagnosis of it. There is a major problem identified in this case of tracking the spine with markers: the skin sliding in connection with the bones. In order to obtain a precise calculus, it requires great knowledge of this phenomenon and the ability to establish a clear relationship between the position of bones and the position of the corresponding points on the skin, taking into account the different characteristics of material and measurement conditions.