In this project a complete design of a
high speed optical motion analyzer system has been developed. The main
core of the image processing unit has been implemented by the
differential algorithm procedure. Some intelligent and conservative
procedures that facilitate the search algorithm have also been proposed
and implemented for the processing of human motions. Moreover, an
optimized modified direct linear transformation (MDLT) method has been
used to reconstruct 3D markers positions which are used for deriving
kinematic characteristics of the motion.
Consequently, a set of complete tests using some simple mechanical
devices were conducted to verify the system outputs. Considering the
system verification for human motion analysis, we used the system for
gait analysis and the results including joint angles showed good
compatibility with other investigations. Furthermore, a sport
application example of the system has been quantitatively presented and
discussed for Iranian National Karate-kas. The low computational cost,
the high precision in detecting and reconstructing marker position with
2.39 mm error, and the capability of capturing from any number of
cameras to increase the domain of operation of the subject, has made the
proposed method a reliable approach for real-time human motion analysis.
No special environment limitation, portability, low cost hardware and
built in units for simulations and kinematic analysis are the other
significant specifications of this system.
Kolahi, A.,
Hoviattalab,
M., Rezaeian,
T., Alizadeh, M.,
Bostan, M.