Databases Reference
In-Depth Information
3.1
Human Body and Motion Modeling
In order to store and retrieve Human motion data, we need an integrated datamodel
which can describe all kind of objects and materials about the human body, for
use in all applications. Creating realistic model of the human body requires
considerable amount of data because of object's complexity. Therefore from
ergonomical point of view we must re-modeling the human body with small number
of primitives. We call it “Simplified Human Body”, which involves, for example,
simplified head, arms, body and legs, connected by small number of joints each
other.
There are two phase in modeling of the human body and its motions.
3.1.1
Human Static Model
1.
Polygon Model
Human body's figure can be described by using Polygon and Texture Models.
An example of polygon model alone is shown in Figure.3, and a complete
texture image is shown in Figure.4.
Figure 3: Polygon Model of Head
2.
Structure Model
Human body consists of more than 200 bones, which are connected so
that the body can move using the power of the muscles
6)
7)
. But mechanism
is too complex to model it completely. We focus on movable joints and
select 24 of them in order to create a simplified model of the human body,
Human Skeleton Model. Each child component of Human Skeleton Model
has its own coordinate system, the origin of which is the connecting point
(i.e. joint) to the parent component.
