Evaluation of motion-based interaction for mobile devices: A case study on image browsing

Yim, S.,Lee, S.,Choi, S. Butterworths ; Elsevier Science Ltd 2011 INTERACTING WITH COMPUTERS Vol.23 No.3

This article evaluates the usability of motion sensing-based interaction on a mobile platform using image browsing as a representative task. Three types of interfaces, a physical button interface, a motion-sensing interface using a high-precision commercial 3D motion tracker, and a motion-sensing interface using an in-house low-cost 3D motion tracker, are compared in terms of task performance and subjective preference. Participants were provided with prolonged training over 20days, in order to compensate for the participants' unfamiliarity with the motion-sensing interfaces. Experimental results showed that the participants' task performance and subjective preference for the two motion-sensing interfaces were initially low, but they rapidly improved with training and soon approached the level of the button interface. Furthermore, a recall test, which was conducted 4 weeks later, demonstrated that the usability gains were well retained in spite of the long time gap between uses. Overall, these findings highlight the potential of motion-based interaction as an intuitive interface for mobile devices.

인체동작 모니터링을 위한 광섬유 기반 의류 소매형 동작센서 연구

강다혜 ( Da Hye Kang ),이영재 ( Young Jae Lee ),이정환 ( Jeong Whan Lee ),이주현 ( Joo Hyeon Lee ) 한국감성과학회 2011 감성과학 Vol.14 No.2

인체의 동작 센싱 방법에 대한 연구가 다양하게 진행되어 왔으나, 기존의 동작 센싱 방식에는 많은 한계점들이 있다. 기존의 동작 센싱 방식의 한계점을 보완하기 위한 일환의 노력으로, 이 논문에서는 비구속적인 동작 센싱이 가능한 광섬유 기반 의류 소매형 동작센서를 탐색적으로 연구하는데 목표를 두었다. 이 논문에서는 광섬유 기반의 의류 소매형 동작 센서를 고안하고, 이를 통하여 일상생활 중에 다양한 동작을 센싱하는 것이 가능한가에 대하여 탐색적 연구를 수행하였다. 또한 본 연구의 범위는 광섬유 기반 동작센서의 가능성 여부와 주요 요건을 탐색하는 것이며, 소매 패턴과 봉제 방식의 특성, 착용자의 체형 특성이 미친 영향은 연구 범위에서 제외되었다. 이러한 방식으로 의복에 적용 가능하도록 고안된 광섬유 기반 의류 소매형 동작센서는, 기존의 동작 센싱 시스템에 비하여 더욱 미세한 인체 동작 측정이 가능하며, 시간·공간의 제약 없이 저비용으로 인체 동작 측정이 가능하다는 장점을 갖는다. Although diverse researches on sensing method of human movement have been performed, there are still many limitations to the existing methods. As a part of supplementing the limitations to the existing motion sensing methods, this study aimed to execute an exploratory examination on a POF-based sleeve-shaped motion sensor for less restrictive sensing of human movement. In this study, a set of POF-based motion sensor, which was embedded in a sleeve-shaped platform was devised, and a set of exploratory experiments was performed on the possibility of sensing of human movement as diverse as in daily life, through this device. The scope of this research was limited to an exploration on the possibility and basic elements of POF-based sleeve-shaped motion sensor, while the influence of sleeve patterns, those of wearer`s somatotype, those of sewing method were not studied in this study. When compared to the pre-existing methods, the POF-based motion sensor platformed on sleeve in this study, which was purposively devised to be applied to the motion sensing clothing shows some beneficial characteristics: more sensitive measurement on human motion, low cost, no timely restriction in sensing, no request for gigantic apparatus and space for sensing.

An Exploratory Study of Smart Sportswear Segments for Motion Sensors-Focusing on Rowing Motions

( Seonhyung Park ),( Bo Ram Han ),( Bokku Kang ),( Hae Dong Lee ),( Han Sung Kim ),( Joohyeon Lee ) 한국감성과학회 2015 추계학술대회 Vol.2015 No.-

Lots of interdisciplinary studies for fusion of high technologes and the other areas of research had tried in these days. In sports training area, high technologies like a vital sign sensor or an accelerometer were adopted as training tools to improve the performance of the sports players. The purpose of this study is finding the proper locations on the human body for attaching the motion sensors in order to develop a smart sportswear which could be helpful in training players. The rowing was selected as a subject sport as lots of movements of the joint on human body could be seen in rowing motions. The players of rowing could be devide into two weight divisions, the lightweight and the heavyweight. In this study, the rates of changes on human skin as the players moved were took on the back, the elbow, the hip and the knee area on human body by 3D motion capturing system. The distances between markers and he differences between the lightweight and heavyweight were analyzed. Finally, the guide lines for designing a mtion sensing smart sportswear.

체감형 게임의 캐릭터 커스터마이징 디자인 시스템 분석

황해표,현승훈,유석호 대한산업경영학회 2022 산업융합연구 Vol.20 No.4

With the spread of COVID-19 and restrictions on outdoor exercise, the number of users using motion sensing games indoors is increasing. An avatar-type character design customization system on behalf of gamers is one of the important research topics for developers in that it can increase the game's appeal to gamers. In this paper, a  motion sensing game with high sales volume and character customization is selected as a game analysis case. Through the analysis of the character customization system of the three selected games, important elements of the customization system were extracted. Finally, the shortcomings of the  motion sensing game character customization system were derived, and improvement plans were presented for the selection system, transformation system, and partial system. It is expected that this proposal will serve as a reference for designing a  motion sensing  game character customization system in the future. 코로나19의 확산과 함께 야외 운동이 제한되면서 실내에서 체감형 게임을 이용하는 이용자 수가 늘고 있다. 게이머를 대신하는 아바타 형식의 캐릭터 디자인 커스터마이징 시스템은 게이머에게 게임에 대한 매력을 높일 수 있다는 측면에서 개발자들에게 중요한 연구주제의 하나이다. 본 논문은 판매량이 많고 캐릭터 커스터마이징이 가능한 체감형 게임을 게임 분석 사례로 선택하였다. 선택된 세 개 게임의 캐릭터 커스터마이징 시스템 분석을 통해 커스터마이징 시스템의 중요한 요소를 추출하였다. 마지막으로 체감형 게임 캐릭터 커스터마이징 시스템의 단점을 도출하고 선택 시스템,변형 시스템,부분 시스템에 대해 개선안을 제시하였다. 이러한 제안이 향후 체감형 게임 캐릭터 커스터마이징 시스템 설계에 나름의 참고가 되기를 기대한다.

Inertial Motion Sensing-Based Estimation of Ground Reaction Forces during Squat Motion

민서정(Seojung Min),김정(Jung Kim) Korean Society for Precision Engineering 2015 한국정밀공학회지 Vol.32 No.4

Joint force/torque estimation by inverse dynamics is a traditional tool in biomechanical studies. Conventionally for this, kinematic data of human body is obtained by motion capture cameras, of which the bulkiness and occlusion problem make it hard to capture a broad range of movement. As an alternative, inertial motion sensing using cheap and small inertial sensors has been studied recently. In this research, the performance of inertial motion sensing especially to calculate inverse dynamics is studied. Kinematic data from inertial motion sensors is used to calculate ground reaction force (GRF), which is compared to the force plate readings (ground truth) and additionally to the estimation result from optical method. The GRF estimation result showed high correlation and low normalized RMSE(R=0.93, normalized RMSE<0.02 of body weight), which performed even better than conventional optical method. This result guarantees enough accuracy of inertial motion sensing to be used in inverse dynamics analysis.

Significant Motion-Based Adaptive Sampling Module for Mobile Sensing Framework

( Muhammad Fiqri Muthohar ),( I Gde Dharma Nugraha ),( Deokjai Choi ) 한국정보처리학회 2018 Journal of information processing systems Vol.14 No.4

Many mobile sensing frameworks have been developed to help researcher doing their mobile sensing research. However, energy consumption is still an issue in the mobile sensing research, and the existing frameworks do not provide enough solution for solving the issue. We have surveyed several mobile sensing frameworks and carefully chose one framework to improve. We have designed an adaptive sampling module for a mobile sensing framework to help solve the energy consumption issue. However, in this study, we limit our design to an adaptive sampling module for the location and motion sensors. In our adaptive sampling module, we utilize the significant motion sensor to help the adaptive sampling. We experimented with two sampling strategies that utilized the significant motion sensor to achieve low-power consumption during the continuous sampling. The first strategy is to utilize the sensor naively only while the second one is to add the duty cycle to the naive approach. We show that both strategies achieve low energy consumption, but the one that is combined with the duty cycle achieves better result.

CNT 기반의 직물센서 구현 방법에 따른 관절동작 센싱 효율 평가

조현승 ( Hyun-seung Cho ),양진희 ( Jin-hee Yang ),이주현 ( Joo-hyeon Lee ) 한국감성과학회 2021 감성과학 Vol.24 No.4

본 연구의 목적은 본 연구에서는 탄소나노튜브 기반의 신축성 직물 센서의 모양과 의복 상 부착 위치가 아동의 사지 관절 동작 센싱 성능에 미치는 영향을 분석하고, 이를 통해 아동의 사지 동작 센싱에 적합한 직물 동작 센서의 요건을 규명하고자 하였다. 실험 대상 아동에게 2종의 센서 모양과 2개의 센서 부착 위치에 따라 조작된 실험복을 착의시킨 후 60 deg/sec의 속도로, 팔과 다리의 굽힘-폄 동작(60°, 90°의 동작 각도별로 10회씩 3회 반복 동작, 총 60회 동작)에 의한 직물 센서의 신장과 수축에 따른 전압의 변화량을 측정하였으며, 가속도 센서를 함께 부착하여, 센싱 결과의 일치도를 분석함으로써 신뢰도를 검증하였다. 실험 결과 아동의 팔과 다리 동작을 가장 효율적으로 측정할 수 있는 직물 센서의 구성 요건은 장방형 모양 센서 및 관절로부터 4㎝ 아래 부위에 부착된 센서로 나타났다. 본 연구에서는 아동의 사지 동작 측정에 적합한 직물 센서를 개발하고 관절동작 센싱에 적합한 센서의 모양과 의복 상 부착 위치에 대한 조건을 분석하였으며, 의복에 통합된 유연한 직물 센서를 활용하여 인체 부위별 동작 센싱이 가능하다는 것을 규명하였다. This study aimed to determine the effects of the shape and attachment position of stretchable textile sensors coated with carbon nanotube on their performance when used to measure children's joint movements. Moreover, the child-safe requirements for fabric motion sensors are established. The child participants were advised to wear integrated clothing equipped with the sensors of various shapes (rectangular and boat-shaped) and attachment positions (at the knee and elbow joints or 4 cm below the joints). The voltage change induced by the elongation and contraction of the fabric sensors was determined for arm and leg flexion-extension motions at 60 deg/s (three measurements of 10 repeats each for 60°and 90°angles, for a total of 60 repetitions). Their dependability was determined by comparing the fabric motion sensors to the associated acceleration sensors. The experimental results indicate that the rectangular-shaped sensor affixed 4 cm below the joint is the most effective fabric motion sensor for measuring children's arm and leg motions. In this study, we designed a textile sensor capable of tracking children's joint motion and analyzed the sensor shape and attachment position on motion sensing clothing. We demonstrated that flexible fabric sensors integrated into garments may be used to detect the joint motions of the human body.

Side Information Extrapolation Using Motion-aligned Auto Regressive Model for Compressed Sensing based Wyner-Ziv Codec

( Ran Li ),( Zongliang Gan ),( Ziguan Cui ),( Minghu Wu ),( Xiuchang Zhu ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.2

In this paper, we propose a compressed sensing (CS) based Wyner-Ziv (WZ) codec using motion-aligned auto regressive model (MAAR) based side information (SI) extrapolation to improve the compression performance of low-delay distributed video coding (DVC). In the CS based WZ codec, the WZ frame is divided into small blocks and CS measurements of each block are acquired at the encoder, and a specific CS reconstruction algorithm is proposed to correct errors in the SI using CS measurements at the decoder. In order to generate high quality SI, a MAAR model is introduced to improve the inaccurate motion field in auto regressive (AR) model, and the Tikhonov regularization on MAAR coefficients and overlapped block based interpolation are performed to reduce block effects and errors from over-fitting. Simulation experiments show that our proposed CS based WZ codec associated with MAAR based SI generation achieves better results compared to other SI extrapolation methods.

Finger Actions Sensing-Based Robot Motion Authoring System

Kwang-Ho Seok,Yoon Sang Kim 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.5

Development of an Apparatus for Measuring and Supporting Human Standup Motions

Taigi Suzuki,Yuta Hongo,Nobuto Matsuhira 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10

An apparatus measuring and supporting human standup motions has been developed and is intended for use by elderly people in daily life. It consists of a force plate, a 6-axis force sensor, a motion sensor, and pressure sensors to measure human movement as they stand from a sitting position on a chair. Electric sliders, which can drive the position of the handle, are also added to study the apparatus’s supporting motion. Results from a basic experiment find that there is a suitable time of drive against the apparatus’s handle. The apparatus’s suitable supporting motion has the potential to reduce the pulling force and burden on subjects.