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Next: Joint Rotation Considering Up: Three Dimensional Motion Estimation Previous: Introduction


A human body is represented by an articulated object model. The model consists of 15 nodes. Each node corresponds to a part of human body. The nodes are connected to each other in a tree graph so that one node includes one joint that has at most 3 rotational axes. Joint rotational angles of the node i at time t are expressed by a vector . The subscript k means the rotational axis of the joint rotational angle. The minimum and maximum value of are defined so that a human model prohibit unrealistic motion.

The motion is said to be estimated if the angles of all the joints are calculated for every frame in an image sequence.

Yoshinari Kameda
Mon Apr 7 14:56:47 JST 1997