On the estimation of an average rigid body motion
平均刚体运动的估计
This paper investigates the definition and the estimation of the Fréchet mean of a random rigid body motion in ℝp. The sample space SE(p) contains objects M=(R,t) where R is a p×p rotation matrix and t is a p×1 translation vector. This work is motivated by applications in biomechanics where the posture of a joint at a given time is expressed as M∈SE(3), the rigid body displacement needed to map a system of axes on one segment of the joint to a similar system on the other…