View Full Version : Re: software code for calculating joint angles from markercartesian coordinates?

03-27-2008, 01:36 PM
Much thanks to all that have responded so far. In reading the replies, I realized I should have made my question clearer. I have been given a data set of human subjects standing and walking on a treadmill recorded with a Phase Space optical tracking system. The data has 6 degrees of freedom information about each active marker (x, y, z, yaw, tilt, roll all relative to a fixed origin) and there is only one active marker on each limb segment (shank, thigh, pelvis, trunk, upper arm, forearm, head). I am looking for code (not commercial software) that would provide me with a method of deriving joint angles from the marker data. I do not have more than one marker on each segment. I am familiar with many software programs available, but do not know of any open source or freeware software that would allow me to process such a data set.

Some of the options mentioned in the replies to date that I am looking into:





KineMat package for Matlab (on isbweb.org)


Visual 3D (http://www.c-motion.com/ )

Thanks again to all that have replied.

Dan Ferris, Ph.D.
Associate Professor
Division of Kinesiology
Department of Biomedical Engineering
Department of Physical Medicine and Rehabilitation
University of Michigan

currently on sabbatical at:
Institute for Neural Computation
UC San Diego
(858) 534-9662