• Title/Summary/Keyword: Movement estimation

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Estimation of the User's Location/Posture for Mobile Augmented Reality (모바일 증강현실 구현을 위한 사용자의 위치/자세 추정)

  • Kim, Jooyoung;Lee, Sooyong
    • Journal of Institute of Control, Robotics and Systems
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    • v.18 no.11
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    • pp.1011-1017
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    • 2012
  • Augmented Reality is being widely used not only for Smartphone users but also in industries such as maintenance, construction area. With smartphone, due to the low localization accuracy and the requirement of special infrastructure, current LBS (Localization Based Service) is limited to show P.O.I. (Point of Interest) nearby. Improvement of IMU (Inertial Measurement Unit) based deadreckoning is presented in this paper. Additional sensors such as the magnetic compass and magnetic flux sensors are used as well as the accelerometer and the gyro for getting more movement information. Based on the pedestrian movement, appropriate sensor information is selected and the complementary filter is used in order to enhance the accuracy of the localization. Additional sensors are used to measure the movements of the upper body and the head and to provide the user's line of sight.

Estimation of Plant Seed Dispersal through Artificial Soil Movement in Incheon Urban Area

  • Kim, Kee-Dae
    • Korean Journal of Environmental Biology
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    • v.21 no.2
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    • pp.181-188
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    • 2003
  • In this study, soil seed and bud bank analysis were performed to abbess the mass of potential vegetation in soils less than 1 year old after covered and estimate the amount of seed bank transport through construction in urban area. The ratio of exotic species number to total species number in study sites and the landfill control site was 0.29 and 0.39, respectively. All plots pooled, mean species number and total mean seedling density per $\m^2$ in the top 10 cm of soil was 11$\pm$0 (average$\pm$S.E.) and 8037$\pm$221.Total plant seeds by artificial soil trasnsfer were estimated to be 53 thousand million $m^{-2}yr^{-1}$ in 10 cm soil depth. It reveals that soil transfer accelerates seeds and vegetation movement and makes urban vegetation mixed and common.

A Study on the Algorithm of BRI 2002 in Japan (일본 BRI 2002의 알고리즘에 관한 고찰)

  • Choi, Mi-Lan;Shin, Yi-Chul;Kwon, Young-Jin
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.04a
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    • pp.294-297
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    • 2008
  • This is the study to investigate the Algorithm of BRI 2002 which is high level estimation program of smoke movement and phenomenon for performance based of design named 'ROOT C', made by Japan. BRI2002 is composed of 3 parts, one is main program, and the others are 4 subroutines and blockdata. The aim of this study is to analyze the BRI 2002, the only one certified program for the P.B.D and compare the other common program for smoke movement simulation program.

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Remote Articulation Training System for the Deafs (청각장애자를 위한 원격조음훈련시스템의 개발)

  • 이재혁;유선국;박상희
    • Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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    • v.7 no.1
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    • pp.43-49
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    • 1996
  • In this study, remote articulation training system which connects the hearing disabled trainee and the speech therapist via B-ISDN is introduced. The hearing disabled does not have the hearing feedback of his own pronuciation, and the chance of watching his speech organs movement trajectory will offer him the self-training of articulation. So the system has two purposes of self articulation training and trainer's on-line checking in remote place. We estimate the vocal tract articultory movements from the speech signal using inverse modelling and display the movement trajectoy on the sideview of human face graphically. The trajectories of trainees articulation is displayed along with the reference trajectories, so the trainee can control his articulating to make the two trajectories overlapped. For on-line communication and ckecking training record the system has the function of video conferencing and tranferring articulatory data.

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Landscape Design Method of Bridges and Visual Safety Estimation of Structural Shape (교량의 경관설계 방법과 구조형상의 시각적 안전성 평가)

  • Yang, Seung Hyoun;Shiomi, Hiroyuki
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.2 no.3
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    • pp.235-244
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    • 1998
  • In the design of bridges, the points of concem are the landscape design, the function, safety and economical efficiency. But most of studies have been performed on structural engineering. The study on the landscape design of bridges has not been done in korea. Therefore, in this research, the design method of bridges by the judgement of structural engineering and landscape engineering has been proposed, through the process to decide the shape of bridges. Also, the research studies a problem about the visual safety of the structural shape in the landscape design of bridges. The visual experiments applied to the seven models about the shape of hunch in bridge pier. The experiment was made in moving velocity of view point, steady looking time and track of eyeball movement.

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Localization for Mobile Robot Navigation using Color Patches Installed on the Ceiling (천정 부착 칼라 패치 배열을 이용한 이동로봇의 자기위치 인식)

  • Wang, Shi;Chen, Hong-Xin;Strzelecki, Michal;Kim, Hyong-Suk
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.2
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    • pp.156-160
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    • 2008
  • A localization system to estimate the position as well as movement direction of mobile robots is proposed in this paper. This system implements a camera fixed on a robot and color patches evenly distributed and mounted on the planar ceiling. Different permutations of patch colors code information about robot localization. Thus, extraction of color information from patch images leads to estimation of robot position. Additionally, simple geometric indicators are combined with patch colors to estimate robot's movement direction. Since only the distribution of patch colors has to be known, the analysis of patch images to is relatively fast and simple. The proposed robot localization system has been successfully tested for navigation of sample mobile robot. Obtained test results indicate the robustness and reliability of proposed technique for robot navigation.

Real Time Eye and Gaze Tracking (트래킹 Gaze와 실시간 Eye)

  • Min Jin-Kyoung;Cho Hyeon-Seob
    • Proceedings of the KAIS Fall Conference
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    • 2004.11a
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    • pp.234-239
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    • 2004
  • This paper describes preliminary results we have obtained in developing a computer vision system based on active IR illumination for real time gaze tracking for interactive graphic display. Unlike most of the existing gaze tracking techniques, which often require assuming a static head to work well and require a cumbersome calibration process fur each person, our gaze tracker can perform robust and accurate gaze estimation without calibration and under rather significant head movement. This is made possible by a new gaze calibration procedure that identifies the mapping from pupil parameters to screen coordinates using the Generalized Regression Neural Networks (GRNN). With GRNN, the mapping does not have to be an analytical function and head movement is explicitly accounted for by the gaze mapping function. Furthermore, the mapping function can generalize to other individuals not used in the training. The effectiveness of our gaze tracker is demonstrated by preliminary experiments that involve gaze-contingent interactive graphic display.

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Dance Movement Guide System using MediaPipe (MediaPipe를 활용한 춤동작 가이드 시스템)

  • Hyeonseo Kim;Jaeyeung Jeong;Mikyeong Moon
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.07a
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    • pp.355-356
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    • 2023
  • K-POP의 가파른 성장세에 따라 댄스 콘텐츠 산업이 확산되는 추세이다. 최근 SNS의 보급이 증가하면서 자신의 댄스 영상을 촬영하고 공유하기도 한다. 그러나 초보자들은 자신의 동작이 어떻게 보이는지 평가하는 데 어려움을 겪어 춤동작을 습득하기 쉽지 않다. 본 논문에서는 MediaPipe를 활용하여 안무 영상과 사용자의 춤영상을 비교하고 올바르게 동작을 따라 하고 있는지 검출해 주는 시스템에 대해 기술한다. 본 시스템을 통해 사용자의 춤동작에 대한 피드백을 받을 수 있으며 초보자들도 정확한 춤동작을 연습할 수 있을 것으로 기대한다.

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A Study on the Control Algorithm for Active Walking Aids by Using Torque Estimation (모터 토크 추정을 통한 능동형 보행보조기의 차량 제어 알고리즘 구현)

  • Kong, Jung-Shik;Lee, Bo-Hee;Lee, Eung-Hyuk;Choi, Heung-Ho
    • Journal of the Korean Institute of Intelligent Systems
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    • v.20 no.2
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    • pp.181-188
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    • 2010
  • This paper presents the control algorithm of active walking aids estimating external torque of the wheels from user's will. Nowadays, interest of the walking aids is increased according to the increase in population of elder and handicapped person. Although many walking aids are developed, most of walking aids don't have any actuators for its movement. However, general walking aids have weakness for its movement to upward/download direction of slope. To overcome the weakness of the general walking aids, many researches for active type walking aids are being progressed. Unfortunately it is difficult to precision control of walking will during its movement, because it is not easy to recognize user's walking will. Many kinds of methods are proposed to recognize of user's walking will. In this paper, we propose control algorithm of walking aids by using torque estimation from wheels. First, we measure wheel velocity and voltage at the walking aids. From these data, external forces are extracted. And then walking will that is included by walking velocity and direction is estimated. Finally, walking aids are controlled by these data. Here, all the processes are verified by simulation.

Pose Estimation of Underwater Robot using Vision System (비젼시스템을 이용한 수중로봇의 위치추정)

  • Kim, Jin-Seok;Kim, Heung-Soo;Cho, Byung-Hak;Kim, Joon-Hong;Shin, Chang-Hoon;Kim, Seok-Gon
    • Proceedings of the KIEE Conference
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    • 2001.11c
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    • pp.292-296
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    • 2001
  • Nuclear regulation requires a periodic visual test for inside structures of reactor to guarantee safe operation of nuclear power plant. However, existing visual test, which is proceeded manually, needs lots of time and labor. Even more, test workers should be exposed in radioactive environment during the test. An underwater robot system has being studied for more efficient and safer test. The position and pose estimation are important issue for the movement control of the robot. An algorithm was presented in this paper, which estimate the location and pose of the underwater robot clearly using vision system.

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