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Application of Compensation Method of Motion Analysis Error Using Displacement Dependency between Anatomical Landmarks and Skin Markers Due to Soft Tissue Artifact
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  • Application of Compensation Method of Motion Analysis Error Using Displacement Dependency between Anatomical Landmarks and Skin Markers Due to Soft Tissue Artifact
  • Application of Compensation Method of Motion Analysis Error Using Displacement Dependency between Anatomical Landmarks and Skin Markers Due to Soft Tissue Artifact
저자명
류태범,Ryu. Taebeum
간행물명
산업경영시스템학회지
권/호정보
2012년|35권 4호|pp.24-32 (9 pages)
발행정보
한국산업경영시스템학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Of many approaches to reduce motion analysis errors, the compensation method of anatomical landmarks estimates the position of anatomical landmarks during motion. The method models the position of anatomical landmarks with joint angle or skin marker displacement using the data of the so-called dynamic calibration in which anatomical landmark positions are calibrated in ad hoc motions. Then the anatomical landmark positions are calibrated in target motions using the model. This study applies the compensation methods with joint angle and skin marker displacement to three lower extremity motions (walking, sit-to-stand/stand-to-sit, and step up/down) in ten healthy males and compares their performance. To compare the performance of the methods, two sets of kinematic variables were calculated using different two marker clusters, and the difference was obtained. Results showed that the compensation method with skin marker displacement had less differences by 30~60% compared to without compensation. And, it had significantly less difference in some kinematic variables (7 of 18) by 25~40% compared to the compensation method with joint angle. This study supports that compensation with skin marker displacement reduced the motion analysis STA errors more reliably than with joint angle in lower extremity motion analysis.