THE DEVELOPMENT OF A LOW COST MOTION ANALYSIS SYSTEM: CEKAK VISUAL 3D V1.0

Abstract

To date, there is lack of biomechanical characterisation on defensive technique (martial arts) due
to the unavailability of appropriate motion tracking system that can be used to characterise the technique in
quasi-training environment. Therefore, this paper presents the development of a novel low cost motion analysis
system, Cekak Visual 3D v1.0 which is capable to track dual martial art practitioner’s skeleton motion in a single
frame view using integration of Matlab GUIs and Microsoft Kinect. The accuracy and precision of the
coordinate data recorded by the system was tested to ensure the quality of the system. The systems perform the
tracking motion with a single Kinect which is a combination of various sensors (RGB and depth sensor) thus
makes it capable in providing three dimensional coordinate data. The analysis reveals that Visual Cekak 3D v1.0
resulted lower percentage error with high internal consistency (Cronbach Alpha, α = 0.904). The proposed
marker-less system is capable to track and store dual skeleton data in a single session tracking. This capability
makes the systems suitable in providing quasi-training and natural setting environment for any martial arts
biomechanics investigation. Therefore, we believe that the system provide new concept development for basic
research in martial arts biomechanics.