• Title/Summary/Keyword: Moving Time

Search Result 3,721, Processing Time 0.026 seconds

Restoration of Realtime Three-Dimension Positions Using PSD Sensor (PSD센서를 이용한 실시간 3차원 위치의 복원)

  • Choi, Hun-Il;Jo, Yong-Jun;Ryu, Young-Kee
    • Proceedings of the KIEE Conference
    • /
    • 2003.11c
    • /
    • pp.507-510
    • /
    • 2003
  • In this paper, optical sensor system using PSD(Position Sensitive Detection) is proposed to obtain the three dimensional position of moving markers attached to human body. To find the coordinates of an moving marrer with stereo vision system, two different sight rays of an moving marker are required. Usually, those are acquired with two optical sensors synchronized at the same time. PSD sensor is used to measure the position of an incidence light in real-time. To get the three-dimension position of light source on moving markers, a conventional camera calibration method are used. In this research, we realized a low cost motion capture system. The proposed system shows high three-dimension measurement accuracy and fast sampling frequency.

  • PDF

A Study on the Gaming Experience of the Movie <1917> - Focused on the Digital Moving Long Take Shot (영화 <1917>의 게임적 체험 연구 - 디지털 무빙 롱테이크 쇼트를 중심으로)

  • Ryu, Woo Hyun;Jung, Won Sik
    • Journal of Korea Multimedia Society
    • /
    • v.25 no.2
    • /
    • pp.411-420
    • /
    • 2022
  • Entering the digital cinema era, movies and games are remediating each other. The shots of digital movies are being transformed into realistic content through digital Moving long-take shots that transcend time and space and move smoothly. At this time, the digital Moving long take shot that continuously captures the space in all directions without an external screen induces a game experience. In addition, the camera that constantly accompanies the person enhances the sense of immersion in the game in a way similar to the point of view of the game. While various immersive device contents represented by VR, AR and XR are emerging, the advent of <1917> suggests significant implications for post-cinema in that it creates a game experience while maintaining the traditional screen environment and cinematic paradigm.

Three-dimensional analysis of flexible pavement in Nepal under moving vehicular load

  • Ban, Bijay;Shrestha, Jagat K.;Pradhananga, Rojee;Shrestha, Kshitij C.
    • Advances in Computational Design
    • /
    • v.7 no.4
    • /
    • pp.371-393
    • /
    • 2022
  • This paper presents a three-dimensional flexible pavement simulated in ANSYS subjected to moving vehicular load on the surface of the pavement typical for the road section in Nepal. The adopted finite element (FE) model of pavement is validated with the classical theoretical formulations for half-space pavement. The validated model is further utilized to understand the damping and dynamic response of the pavement. Transient analysis of the developed FE model is done to understand the time varying response of the pavement under a moving vehicle. The material properties of pavement considered in the analysis is taken from typical road section used in Nepal. The response quantities of pavement with nonlinear viscoelastic asphalt layer are found significantly higher compared to the elastic pavement counterpart. The structural responses of the pavement decrease with increase in the vehicle speed due to less contact time between the tires of the vehicle and the road pavement.

A low computational cost method for vibration analysis of rectangular plates subjected to moving sprung masses

  • Nikkhoo, Ali;Asili, Soheil;Sadigh, Shabnam;Hajirasouliha, Iman;Karegar, Hossein
    • Advances in Computational Design
    • /
    • v.4 no.3
    • /
    • pp.307-326
    • /
    • 2019
  • A low computational cost semi-analytical method is developed, based on eigenfunction expansion, to study the vibration of rectangular plates subjected to a series of moving sprung masses, representing a bridge deck under multiple vehicle or train moving loads. The dynamic effects of the suspension system are taken into account by using flexible connections between the moving masses and the base structure. The accuracy of the proposed method in predicting the dynamic response of a rectangular plate subjected to a series of moving sprung masses is demonstrated compared to the conventional rigid moving mass models. It is shown that the proposed method can considerably improve the computational efficiency of the conventional methods by eliminating a large number of time-varying components in the coupled Ordinary Differential Equations (ODEs) matrices. The dynamic behaviour of the system is then investigated by performing a comprehensive parametric study on the Dynamic Amplification Factor (DAF) of the moving loads using different design parameters. The results indicate that ignoring the flexibility of the suspension system in both moving force and moving mass models may lead to substantially underestimated DAF predictions and therefore unsafe design solutions. This highlights the significance of taking into account the stiffness of the suspension system for accurate estimation of the plate maximum dynamic response in practical applications.

MATHEMATICAL MODELLING FOR THE AXIALLY MOVING PLATE WITH INTERNAL TIME DELAY

  • Kim, Daewook
    • East Asian mathematical journal
    • /
    • v.37 no.5
    • /
    • pp.619-626
    • /
    • 2021
  • In [1, 2], we studied the string-like system with time-varying delay. Unlike the string system, the plate system must consider both longitudinal and transverse strains. First, we consider the physical phenomenon of an axially moving plate concerning kinetic energy, potential energy, and work dones. By the energy conservation law in physics, we have a nonlinear plate-like system with internal time delay.

Spatio-Temporal Index Structure based on KDB-Tree for Tracking Positions of Moving Objects (이동 객체의 위치 추적을 위한 KDB-트리 기반의 시공간 색인구조)

  • Seo Dong-Min;Bok Kyoung-Soo;Yoo Jae Soo;Lee Byoung-Yup
    • Journal of Internet Computing and Services
    • /
    • v.5 no.4
    • /
    • pp.77-94
    • /
    • 2004
  • Recently, the needs of index structure which manages moving objects efficiently have been increased because of the rapid development of location-based techniques. Existing index structures frequently need updates because moving objects change continuatively their positions. That caused entire performance loss of the index structures. In this paper, we propose a new index structure called the TPKDB-tree that is a spatio-temporal index structure based on KDB-tree. Our technique optimizes update costs and reduces a search time for moving objects and reduces unnecessary updates by expressing moving objects as linear functions. Thus, the TPKDB-tree efficiently supports the searches of future positions of moving objects by considering the changes of moving objects included in the node as time-parameter. To maximize space utilization, we propose the new update and split methods. Finally, we perform various experiments to show that our approach outperforms others.

  • PDF

An Efficient Algorithm for Spatio-Temporal Moving Pattern Extraction (시공간 이동 패턴 추출을 위한 효율적인 알고리즘)

  • Park, Ji-Woong;Kim, Dong-Oh;Hong, Dong-Suk;Han, Ki-Joon
    • Journal of Korea Spatial Information System Society
    • /
    • v.8 no.2 s.17
    • /
    • pp.39-52
    • /
    • 2006
  • With the recent the use of spatio-temporal data mining which can extract various knowledge such as movement patterns of moving objects in history data of moving object gets increasing. However, the existing movement pattern extraction methods create lots of candidate movement patterns when the minimum support is low. Therefore, in this paper, we suggest the STMPE(Spatio-Temporal Movement Pattern Extraction) algorithm in order to efficiently extract movement patterns of moving objects from the large capacity of spatio-temporal data. The STMPE algorithm generalizes spatio-temporal and minimizes the use of memory. Because it produces and keeps short-term movement patterns, the frequency of database scan can be minimized. The STMPE algorithm shows more excellent performance than other movement pattern extraction algorithms with time information when the minimum support decreases, the number of moving objects increases, and the number of time division increases.

  • PDF

Information extraction of the moving objects based on edge detection and optical flow (Edge 검출과 Optical flow 기반 이동물체의 정보 추출)

  • Chang, Min-Hyuk;Park, Jong-An
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.27 no.8A
    • /
    • pp.822-828
    • /
    • 2002
  • Optical flow estimation based on multi constraint approaches is frequently used for recognition of moving objects. However, the use have been confined because of OF estimation time as well as error problem. This paper shows a new method form effectively extracting movement information using the multi-constraint base approaches with sobel edge detection. The moving objects anr extraced in the input image sequence using edge detection and segmentation. Edge detection and difference of the two input image sequence gives us the moving objects in the images. The process of thresholding removes the moving objects detected due to noise. After thresholding the real moving objects, we applied the Combinatorial Hough Transform (CHT) and voting accumulation to find the optimal constraint lines for optical flow estimation. The moving objects found in the two consecutive images by using edge detection and segmentation greatly reduces the time for comutation of CHT. The voting based CHT avoids the errors associated with least squares methods. Calculation of a large number of points along the constraint line is also avoided by using the transformed slope-intercept parameter domain. The simulation results show that the proposed method is very effective for extracting optical flow vectors and hence recognizing moving objects in the images.

Design and Implementation of Moving Object Model for Nearest Neighbors Query Processing based on Multi-Level Global Fixed Gird (다단계 그리드 인덱스 기반 최근접 질의 처리를 위한 이동체 DBMS 모델의 설계와 구현)

  • Joo, Yong-Jin
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.19 no.3
    • /
    • pp.13-21
    • /
    • 2011
  • In mobile environment supporting mobility technologies, user requirements have been increased with respect to utilization of location information. In particular, moving object DBMS has consistently posed in order to efficiently maintain traffic information related to location of vehicle which tents to tremendously change over time. Despite the fact that these sorts of researches must be taken into consideration, empirical studies on moving object in terms of map database for lbs service, spatial attribute of which is continuously changed over time, have rarely performed. Therefore, aim of this paper is to suggest efficient spatial index scheme, which is capable of supporting query processing algorithm and location of moving object over time, by developing new empirical model. As a result, we can come to the conclusion that moving object model based on multi-fixed grid index makes it possible to cut down on the number of entity for retrieving. What's more, this model enables hierarchical data to be accessed through efficient spatial filtering on large-scale lbs data and constraints in accordance with level in order to display map.

Real Time Moving Object Detection Based on Frame Difference and Doppler Effects in HSV color model (HSV 컬러 모델에서의 도플러 효과와 영상 차분 기반의 실시간 움직임 물체 검출)

  • Sanjeewa, Nuwan;Kim, Won-Ho
    • Journal of Satellite, Information and Communications
    • /
    • v.9 no.4
    • /
    • pp.77-81
    • /
    • 2014
  • This paper propose a method to detect moving object and locating in real time from video sequence. first the proposed method extract moving object by differencing two consecutive frames from the video sequence. If the interval between captured two frames is long, it cause to generate fake moving object as tail of the real moving object. secondly this paper proposed method to overcome this problem by using doppler effects and HSV color model. finally the object segmentation and locating is done by combining the result that obtained from steps above. The proposed method has 99.2% of detection rate in practical and also this method is comparatively speed than other similar methods those proposed in past. Since the complexity of the algorithm is directly affects to the speed of the system, the proposed method can be used as low complexity algorithm for real time moving object detection.