• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.119-120
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• 2016

줄넘기와 같은 반복적인 운동들의 개수 측정은 가속도 센서의 가속도 값과 자이로 센서의 각속도 값의 특징을 추출하고 선택하여 개수를 판단한다. 하지만 잡음과 진동에 취약한 가속도와 드리프트 현상이 발생하는 각속도의 문제점으로 인하여 줄넘기 개수를 세는데 정확도가 떨어지는 문제가 발생한다. 본 논문에서는 6축 가속도 자이로 센서에 상보필터를 적용하여 가속도와 각속도 값의 오류를 최소화하여 보다 정확한 개수를 측정하는 방법을 제안한다. 제안하는 방법은 센서 값의 특징만을 보고 판단하는 방법에 비해 정확하게 개수를 측정하는 것을 실험 결과를 통해 확인할 수 있다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.4
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• pp.577-584
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• 1986

본 연구에서는 측정자가 시간과 노력을 소비하면서 3차원 연쇄기구의 공간운 동을 유추적으로 측정한 현재까지의 실험측정을 지양하고, 국내에서 구입 가능하고 염 가인 Apple II와 같은 같은 마이크로 컴퓨터 또는 마이크로프로세서를 이용, 3차원 연 쇄기구의 공간운동을 신속하고 정확하게 측정분석하는 자동 실험장치를 설계 제작한 다음, 이 장치를 일반 3차원 연쇄기구 모델에 적용 측정된 결과를 기호방정식을 이용 한 일반 연쇄기구 운동식의 이론 결과와 비교 검토하였다.

• The KIPS Transactions:PartB
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• v.15B no.2
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• pp.103-112
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• 2008

Image-based motion capture technology is often used in making realistic computer animation. In this paper we try to implement image-based motion rendering by fixing a camera to a PC. Existing image-based rendering algorithms have disadvantages of high computational burden or low accuracy. The former disadvantage causes too long making-time of an animation. The latter disadvantage degrades reality in making realistic animation. To compensate for those disadvantages of the existing approaches, this paper presents an image-based motion rendering algorithm with low computational load and high estimation accuracy. In the proposed approach, an incremental motion rendering algorithm with low computational load is analyzed in the respect of optimal control theory and revised so that its estimation accuracy is enhanced. If we apply this proposed approach to optic motion capture systems, we can obtain additional advantages that motion capture can be performed without any markers, and with low cost in the respect of equipments and spaces.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.90-93
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• 2007

해양수산부에서 해양 DGPS기준국과 연계하여 전국망 위성항법보정시스템 (NDGPS) 구축 사업을 추진 중에 있으며, 2008년도 춘천기준국이 설치 완료되면 우리나라 전역에서 실시간 DGPS 측위 정보를 이용할 수 있게 되었다. 따라서 DGPS 이용 활성화를 위하여 무엇보다도 DGPS 측위 정확도의 신뢰성이 요구되는바, 실시간 DGPS 의 측위 정확도를 측정 ${\cdot}$ 분석하여 신뢰성을 검증하였다. 실시간 NDGPS 측위 정확도는 Static 측정에 있어 0.42m(RMS), 회전운동에 의한 Dynamic 측정시 0.48m(RMS)로 분석되었으며, RTK에 의한 비교 측정 ${\cdot}$ 분석도 병행하였다. 따라서 위성항법보정시스템 (DGPS)은 높은 정확도를 요구하는 GIS구축사업 분야에 직접적으로 이용될 수 없으나 실시간 측위 정보를 필요로 하는 GIS활용 분야에서 DGPS가 다양하게 이용될 수 있을 것이다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.1
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• pp.151-156
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• 2021

The speed and direction of the earth's fluid motion is measured by a remote sensing method using electromagnetic waves. Using UHF radar and GPS Sonde, the vertical profile of fluid velocity was calculated by the Euler measurement method and the Lagrange measurement method, respectively. Since the wind direction, which is the direction of motion of the atmosphere, is indicated in the direction of the wind blowing, and a circular value of 0° - 360° is used, it is necessary to pay attention to statistical analysis. Errors caused by calculation conditions are provided, and the corrected accuracy of comparison results is improved by 400%.

• Journal of Broadcast Engineering
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• v.7 no.3
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• pp.219-228
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• 2002

In this paper, we propose a new method of converting 2D video into 3D stereoscopic video, called stereoscopic conversion. In general, stereoscopic images are produced using the motion informations. However unreliable motion informations obtained especially from block-based motion estimation cause the wrong generation of stereoscopic images. To solve for this problem, we propose a stereoscopic conversion method based upon the utilization of key frame that has the better accuracy of estimated motion informations. As well, as generation scheme of stereoscopic images associated with the motion type of each key frame is proposed. For the performance evaluation of our proposed method, we apply it to five test images and measure the accuracy of key frame-based stereoscopic conversion. Experimental results show that our proposed method has the accuracy more than about 90 percent in terms of the detection ratio of key frames.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.35-41
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• 2021

The purpose of this study was to investigate the effect of prop exercise convergence using vibration on batting speed and batting accuracy in elementary school baseball players. Three times a week for six weeks. The vibration exercise experimental group and the control group were divided into each twenty members. The experimental group performed vibration convergence prop exercise, and the control group performed general exercise. Batting speed and Batting accuracy were measured. The experimental and control groups showed significant differences in the groups of batting speed before and after intervention. There was significant difference between the batting accuracy in the comparison between the experimental group and the control group. Prop convergence vibration exercise may help to improve the batting speed and batting accuracy of elementary school baseball players. In the future, adult and sport injury patient are needed.

• Journal of the Korea Society of Computer and Information
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• v.27 no.12
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• pp.93-100
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• 2022

In this paper, we propose a mobile app for personalized rehabilitation exercise coaching and management service using an edge computing-based personalized exercise information collection system. The existing management method that relies on user input information has difficulty in examining the actual possibility of rehabilitation. In this paper, we implement an application that collects movement information along with body joint information through image information analysis based on edge computing at a remote location, measures the time and accuracy of the movement, and provides rehabilitation progress through correct posture information. In addition, in connection with the measurement equipment of the rehabilitation center, the health status can be managed, and the accuracy of exercise information and trend analysis information is provided. The results of this study will enable management and coaching according to self-rehabilitation exercises in a contactless environment.

• Journal of the Korea Society of Computer and Information
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• v.26 no.3
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• pp.43-50
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• 2021

In this paper, we design and implement KITNESS, a windows application that feeds back the accuracy of fitness motions based on Kinect sensors. The feature of this application is to use Kinect's camera and joint recognition sensor to give feedback to the user to exercise in the correct fitness position. At this time, the distance between the user and the Kinect is measured using Kinect's IR Emitter and IR Depth Sensor, and the joint, which is the user's joint position, and the Skeleton data of each joint are measured. Using this data, a certain distance is calculated for each joint position and posture of the user, and the accuracy of the posture is determined. And it is implemented so that users can check their posture through Kinect's RGB camera. That is, if the user's posture is correct, the skeleton information is displayed as a green line, and if it is not correct, the inaccurate part is displayed as a red line to inform intuitively. Through this application, the user receives feedback on the accuracy of the exercise position, so he can exercise himself in the correct position. This application classifies the exercise area into three areas: neck, waist, and leg, and increases the recognition rate of Kinect by excluding positions that Kinect does not recognize due to overlapping joints in the position of each exercise area. And at the end of the application, the last exercise is shown as an image for 5 seconds to inspire a sense of accomplishment and to continuously exercise.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.347-348
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• 2017

만성요통 환자 15명을 대상으로 4주간, 주 3회 3차원 척추안정화운동과 허리안정화운동을 실시한 후 3차원 척추안정화검사를 통하여 허리심부근력을 측정하고 Tetrax장비를 통하여 신체균형능력을 평가하였다. 단기간일지라도 3차원척추안정화운동을 통해 정확한 방법으로 운동을 실시하였더니 만성요통환자의 허리근력과 자세균형에 긍정적인 효과를 주었다.