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모션캡쳐를 이용한 걸음걸이 중의 동적 Q-angle 의 남녀 차이
한선혜(Seonhye Han),권정훈(Junghoon Kwon) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
The purpose of this study is to find the differences between people walk. To this end, we conducted a motion capture of a number of people. Why finding the differences of such a gait is intended for personal identification. We calculated the Q-angle value of the walking from the motion capture data. Motion Capture has been conducted using the VICON camera and PIG(Plug in Gait) market sets, men and women were captured motion six people each. Typical Q-angle is measured from at the stop state of the standing or lying down. However, we calculate the Q-angle value of the gait for personal identification. The women Q-angle are greater than men’s Q-angle. In this study, the trend was similar. And we were able to find the value of q-angle is also larger than the left leg to the right leg. And, we will go step closer to developing a personal identification algorithms based on these results.
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모션캡쳐를 이용한 남녀 걸음걸이 중 골반과 어깨의 움직임 분석
이효진(Hyojin Lee),권정훈(Junghoon Kwon) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
In recent years, Human can achieve automation about many part of life as Internet of things technic is developed. Besides, Security problems such as related the technics become issues too. The purpose of this study is finding of quantitative gender difference of pelvic motions, shoulder’s motions during walking for using human identification. For analyzing the motion, We conducted motion capture using VICON camera and PIG(Plug in Gait) marker sets, 17 subject(male:9, female:8) were captured motion. We calculated tilt, obliquity, rotation of pelvis and shoulder from the motion capture data. The method for calculating is comparing global system we defined and local system. As a result, we can find female’s pelvic motions is larger than those of the males, shoulder motion is smaller. And there is no quantitative relation between pelvic and shoulder’s motion. In other words, People’s motion of pelvis and shoulder is unique and we can use for developing human identification.
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김민성(Minsung Kim),박재흥(Jaeheung Park),권정훈(Junghoon Kwon) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1
걸음걸이를 이용한 개별 인체 인식은 홍채나 얼굴, 지문, 사인 등이 가지지 못한 고유의 장점을 가져 연구자들의 관심을 받고 있다. 걸음걸이는 비강압적이며 원거리성의 장점이 있다. 본 논문은 기존의 2차원에서의 실루엣 기반 인식에 사용되었던 유클리디안 거리를 직관적으로 사용하여 개별 인체를 인식하고 이를 모션 캡쳐(Motion capture) 데이터에 적용하여 적은 정보로도 개별 인체가 구별되는 것을 보인다. Such as iris, fingerprint, signature, biometric using gait recognition has recently gained attention. Gait is non-coercive and offers potential to recognition at a distance. In this paper, we use euclidean distance intuitively to identify human individually and apply to motion capture data in order to improve our algorithm that can identify human individually with less information than previous methods.
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굴곡이 있는 신발을 신었을 때 하지근육 활성화에 대한 컴퓨터 시뮬레이션을 이용한 분석
표창민(Changmin Pyo),이건우(Kunwoo Lee),권정훈(Junghoon Kwon),박성우(Sungwoo Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The winding shoes are introduced to revitalize muscle of the lower limbs and to modify the angle of ankle when walking. However the products for human's health-care should be proved to be functional and safe. Variable products for human can sometimes make severe accident and side effect. In this view, winding shoes must be certificated. The functionality of winding shoes is being analyzed; it's proved that the difference of pressure distribution made by shape of the shoes can help lower limb muscle to be strengthened. But these analyses focused activation of muscle beneath skin using EMG. Because this approach has limitation, this paper approaches by using simulation software SIMM. SIMM was used many papers because of its accuracy. We captured the movements of 3 volunteers who are men in their twenties. They took winding shoes and normal shoes on each experiment. This paper focused on muscle activation of the lower limbs when taking the winding shoes. We checked muscles and analyzed modification between winding shoes and normal. As a result of experiments, we could find that most of the muscles of lower limbs were activated. The analysis of inner muscles that cannot be measured by direct methods can help customers to be more effective to their healthcare. And simulation programs such as SIMM can make it possible.
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Computer-aided Analysis of Stability and Muscular Movement of Lower Limbs during Pirouette in Ballet
Sungwoo Park(박성우),Changmin Pyo(표창민),Jungsub Lee(이정섭),Junghoon Kwon(권정훈),Kunwoo Lee(이건우) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Ballet is a famous dance form characterized by elegant motion. Ballet dancers wear special shoes developed specifically to reduce the load on the muscles of their lower limbs. Such shoes are necessary because normal shoes have limited capacity when it comes to expressing beautiful and stable motion. Since ballet shoes are popularly used by dancers, it would be beneficial to verify their functions by computer simulations. To verify the functions of ballet shoes, we studied the pirouette, a motion in which a dancer makes one or two revolutions on a vertical axis passing through the left leg. During a pirouette, dancers balance themselves on their left leg; therefore, this motion requires stability and the muscular force of the left leg. We conducted experiments with three types of shoes?pointe shoes, sneakers, and normal shoes?and we compared the three types. We used SIMM to analyze motion stability and the load on the muscle of the axial leg. For measuring stability during a pirouette, we used the standard deviation of the distances between the axis of rotation and the center of mass of the dancer. The sneakers showed the least standard deviation, followed by the pointe shoes; normal shoes had the greatest standard deviation. The experiment with pointe shoes showed the least muscle burden. The burden with normal shoes was four times as large as that with pointe shoes and two times as large as that with sneakers. In this paper, we have used computer simulation as a study approach to help dancers select shoes most effective for them and to suggest new designs for ballet shoes.
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