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http://dx.doi.org/10.9718/JBER.2015.36.5.228

Evaluation of Accuracy and Inaccuracy of Depth Sensor based Kinect System for Motion Analysis in Specific Rotational Movement for Balance Rehabilitation Training

Kim, ChoongYeon (Department of Advanced Biomedical Engineering Lab., Korea Institue of Industrial Technology)
Jung, HoHyun (Mechanical Engineering, Sejong University)
Jeon, Seong-Cheol (R&D Team, Senior Products Industrial Center)
Jang, Kyung Bae (Mechanical and Control Engineering, The Cyber University of Korea Seoul)
Chun, Keyoung Jin (Department of Advanced Biomedical Engineering Lab., Korea Institue of Industrial Technology)

Publication Information

Journal of Biomedical Engineering Research / v.36, no.5, 2015 , pp. 228-234 More about this Journal

Abstract

The balance ability significantly decreased in the elderly because of deterioration of the neural musculature regulatory mechanisms. Several studies have investigated methods of improving balance ability using real-time systems, but it is limited by the expensive test equipment and specialized resources. Recently, Kinect system based on depth data has been applied to address these limitations. Little information about accuracy/inaccuracy of Kinect system is, however, available, particular in motion analysis for evaluation of effectiveness in rehabilitation training. Therefore, the aim of the current study was to evaluate accuracy/inaccuracy of Kinect system in specific rotational movement for balance rehabilitation training. Six healthy male adults with no musculoskeletal disorder were selected to participate in the experiment. Movements of the participants were induced by controlling the base plane of the balance training equipment in directions of AP (anterior-posterior), ML (medial-lateral), right and left diagonal direction. The dynamic motions of the subjects were measured using two Kinect depth sensor systems and a three-dimensional motion capture system with eight infrared cameras for comparative evaluation. The results of the error rate for hip and knee joint alteration of Kinect system comparison with infrared camera based motion capture system occurred smaller values in the ML direction (Hip joint: 10.9~57.3%, Knee joint: 26.0~74.8%). Therefore, the accuracy of Kinect system for measuring balance rehabilitation traning could improve by using adapted algorithm which is based on hip joint movement in medial-lateral direction.

Keywords

Balance Ability; Balance Training; Motion Capture System; Kinect System; Base Plane;

Citations & Related Records

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