• Journal of the Institute of Electronics Engineers of Korea CI
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• v.49 no.3
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• pp.27-33
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• 2012

Tele-presence and tele-operation techniques are used to build up an immersive scene and control environment for the distant user. This paper presents a novel tele-presence system using the camera tracking based on planar homography. In the first step, the user wears the HMD(head mounted display) with the camera and his/her head motion is estimated. From the panoramic image by the omni-directional camera mounted on the mobile robot, a viewing image by the user is generated and displayed through HMD. The homography of 3D plane with markers is used to obtain the head motion of the user. For the performance evaluation, the camera tracking results by ARToolkit and the homography based method are compared with the really measured positions of the camera.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.222-225
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• 1989

A method is proposed to design a mobile tele-existence system, which can be remotely driven with the auditory and visual sensation of presence. The system consists of mobile robot with camera and two microphones. The effectiveness of the proposed system was evaluated by navigation experiments of the tele-robot through an obstructed space.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1999.06b
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• pp.87-93
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• 1999

In this paper, we introduce a novel virtual studio environment where a broadcaster in the virtual set interacts with tele-viewers as if they are sharing the same environment as participants. A tele-viewer participates physically in the virtual studio environment by a dummy-head equipped with video "eyes" and microphone "ears" physically located in the studio. The dummy head as a surrogate of the tole-viewer follows the tele-viewer's head movements and views and hears through the dummy head like a tele-operated robot. By introducing the tele-presence technology in the virtual studio setting, the broadcaster can not only interact with the virtual set elements like the regular virtual studio environment but also share the physical studio with the surrogates of the tele-viewers as participants. The tele-viewer may see the real broadcaster in the virtual set environment and other participants as avatars in place of their respective dummy heads. With an immersive display like HMD, the tele-viewer may look around the studio and interact with other avatars. The new interactive virtual studio with the immersive viewer environment may be applied to immersive tele-conferencing, tele-teaching, and interactive TV program productions.program productions.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.3
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• pp.605-613
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• 2009

In this paper, we studied for the real-time azimuthal measurement of HMD (Head Mounted Display) to control the tele-operated vision system on the mobile robot. In the preexistence tele-operated vision system, a joystick was used to control the pan-tilt unit of the remote camera system. To give the sense of presence to the tele-operator, we used a HMD to display the remote scene, measured the rotation angle of the HMD on a real time basis, and transmitted the measured rotation angles to the mobile robot controller to synchronize the pan-tilt angles of remote camera with the HMD. In this paper, we suggest an algorithm for the real-time estimation of the HMD rotation angles using feature points extraction from pc-camera image. The simple experiment is conducted to demonstrate the feasibility.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.458-460
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• 2020

스마트미터의 기술 발달과 보급으로 인해 전력데이터의 수집이 보다 수월 해짐에 따라 각 시스템에 효율적인 맞춤 서비스 제공을 위한 전력 데이터 분석 기술에 관한 다양한 연구가 활발하게 진행되고 있다. 관련하여 본 논문에서는 숙박업소의 각 방마다 전력소비량을 측정 및 수집하여 전력소비패턴을 분석하고 특징 추출 및 XGBoost 를 이용한 머신러닝 분석방법으로 각 방의 사람 재실 여부를 판별하는 방법을 소개한다. 이와 같은 연구를 통해 추후 숙박업소 혹은 숙박업소를 이용하는 소비자들의 맞춤 서비스 제공에 응용 및 적용 할 수 있다.

• The Journal of Korean Physical Therapy
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• v.35 no.1
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• pp.1-7
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• 2023

Purpose: This study sought to investigate the perceptions and service needs of tele-physical therapy among people in their 50s and older in Korea. Methods: Subjects were inducted during a 14-day survey of 104 people over the age of 50 in Korea and were administered a questionnaire consisting of 14 questions about their general characteristics and another 14 questions about tele-physical therapy. Results: The general characteristics of the participants (participants' gender, whether they were single or married, number of cohabiting families, final education, major, job, physical therapy experience, tele-physical therapy experience, presence of a physical therapy worker among relatives, subjective health awareness, chronic disease conditions if any, frequency of drinking, and smoking) were investigated. Among the perceptions of the subjects about tele-physical therapy, the score of 'awareness' was the lowest, and that of 'resolving restrictions on hospital visits' was the highest. In an analysis of the correlation between perceptions and needs, there was a significant correlation with factors other than 'awareness' and 'information protection' factors. The regression analysis of necessity and factors revealed that the awareness of necessity increased as the intention to use, health improvement, and time efficiency improved. Conclusion: These findings presented the perception and necessity of tele-physical therapy for adults in their 50s or older in Korea. These results will help confirm the demand for tele-physical therapy in this age group in Korea and the need to improve the available physical therapy services.

• Journal of Mechanical Science and Technology
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• v.18 no.11
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• pp.1941-1948
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• 2004

This paper presents a novel design of indoor airship having a passive wheeled mechanism and its stationary position control. This wheeled blimp can work both on the ground using wheeled vehicle part and in the air using the floating capability of the blimp part. The wheeled blimp stands on the floor keeping its balance using a caster-like passive wheel mechanism. In tele-guidance application, stationary position control is required to make the wheeled blimp naturally communicate with people in standing phase since the stationary blimp system responds sensitively to air flow even in indoor environments. To control the desired stationary position, a computed torque control method is adopted. By performing a controller design through dynamic analysis, the control characteristics of the wheeled blimp system have been found and finally the stable control system has been successfully developed. The effectiveness of the controller is verified by experiment for the real wheeled blimp system.

• Proceedings of the IEEK Conference
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• 2009.05a
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• pp.360-362
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• 2009

In this paper, we studied for the real-time azimuthal measurement of HMD(Head Mounted Display) using the feature points detection to control the tele-operated vision system on the mobile robot. To give the sense of presence to the tele-operator, we used a HMD to display the remote scene, measured the rotation angle of the HMD on a real time basis, and transmitted the measured rotation angles to the mobile robot controller to synchronize the pan-tilt angles of remote camera with the HMD. In this paper, we suggest an algorithm for the real-time estimation of the HMD rotation angles using feature points extraction from pc-camera image.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.23-25
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• 2012

본 논문에서는 smartphone과 Arduino, Max/Msp를 이용한 모바일 미디어 아트 시스템을 제안한다. 시스템의 입력장치로 flexible센서가 부착된 tangible glove와 smartphone의 app이 사용되었고 이들의 조작 데이터는유(무)선 시리얼통신 및 TCP/IP 통신을 통해 원격지 서버상의 Max/Msp 어플리케이션으로 전달된다. 서버는 전달된 데이터를 기반으로 서버와 연결되어 있는 로봇 기타리스트의 열손가락을 제어하고 사운드 및 제반 영상을 출력한다. 결과적으로 사용자는 연주자인 동시에 관객으로서 시각, 촉각, 청각의 다양한 감각을 동시에 만족하고, 시스템에 몰입할 수 있게 된다. 본 논문에서는 기존 미디어 아트 시스템들이 가지고 있었던 사용자의 단순 참여라는 1차원적인 논리에서 벗어나고자 다양한 시스템의 결합을 통해 작품참여를 유도하였고 이를 통해 사용자가 그들만의 고유한 작품을 생성함으로써 기존의 미디어 아트 시스템과의 차별성을 도모하였다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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• pp.74-77
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• 2007

In this paper, we propose a system which can display panoramic-stereopic image for tele-operating excavator. the system was implemented by using center-viewpoint corresponding algorithm and image mosaic process. We could obtain remarkable result from the survey among the ex-pert of excavator. We also design a control station with RF transfer module, H.264 codec module and suggested algorithm. Especially, our system shows a superb performance on cubic effect and presence sense of a field of excavating work.