Development of an optical motion-capture system for 3D gait analysis
a Faculty of Mechanical and Aerospace Engineering, InstitutTeknologi Bandung, Indonesia
Abstract
This work presents the development of an optical motion-capture system for 3D gait analysis. The system consists of two video cameras with speed of 25 fps, flash lighter, LED markers, and two PCs and technical computing software, which are used to acquire marker motion attached to human body during walking. The developed system has five module to obtain real coordinate of markers, i.e. pre-processing, camera calibration, marker detection and tracking, 3D reconstruction, and post-processing module. In the experiment, two camcorders are synchronized using flashlight. The recorded videos from experiment are extracted into frames. The synchronized framesare converted into binary images and marker position can be detected and tracked using least distance method. 3D Direct Linear Transformation method has been used to reconstruct 3D marker position in real coordinate. The marker positions data obtained from experiment could then be used for further kinematics and kinetics analysis of human gait. © 2011 IEEE.
Author keywords
3D reconstruction,3DGait Analysis,Camera calibration,Detection and tracking,Direct linear transformation,Direct linear transformation method,Distance method,Human bodies,Human gait,Kinetics analysis,Motion capture,Post processing,Pre-processing,Real coordinates,Technical computing
Indexed keywords
3D Direct Linear Transformation,3DGait Analysis,Camera Synchronization,Image Processing,Least Distance Method