Biomedical Engineering Reference
In-Depth Information
2
The Different Movement Analysis
Devices Available on the Market
This chapter briefly introduces the different types of
movement analysis systems that currently exist, presents
the main principles and describes the main advantages and
disadvantages for each. Second, we will focus our interest on
the systems most currently used, based on the use of passive
markers, for which the successive stages required for the
calculation of three-dimensional
(3~)
trajectories of markers
and the implementation of an experimental protocol will be
described.
2.1. Which tools for different applications?
The simplest tool to analyze movement is the videographic
recording using a digital camcorder, ultimately in high
definition and/or high speed together with the use of video
analysis software.
It
is then possible to follow the trajectories
of points of interest by the manual labeling of each image
(requiring a very long processing time) or the use of free
software, such as Kinovea, or commercial software, such as
Oartfish, PROTrack, etc., which allows the automatic or
semi-automatic tracking of objects (fixed targets on points of
interest), measurement of angles (in the plane of the image
