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Energy-efficient trajectory tracking for mobile devices

Mikkel Baun Kjærgaard, Sourav Bhattacharya, Henrik Blunck, Petteri Nurmi
2011 Proceedings of the 9th international conference on Mobile systems, applications, and services - MobiSys '11  
Furthermore, when trajectory information needs to be sent to a remote server, on-device simplification of the trajectories is needed to reduce the amount of data transmission.  ...  Emergent location-aware applications often require tracking trajectories of mobile devices over a long period of time.  ...  Cao et al. determine running times, several hundred times higher for optimal line simplification algorithms compared to the Douglas-Peucker algorithm, run on trajectories of a few hundred positions.  ... 
doi:10.1145/1999995.2000025 dblp:conf/mobisys/KjaergaardBBN11 fatcat:4nanigh4rzg5xl4a5doov4sepq

Accelerating the computation of multi-scale visual curvature for simplifying a large set of polylines with Hadoop

Peichao Gao, Zhao Liu, Fei Han, Lei Tang, Meihui Xie
2015 GIScience & Remote Sensing  
GIScience researchers expect that the simplification method can be performed in near real-time when maps are displayed on a series of scales.  ...  Over the years, the vast majority of curvature-based simplification algorithms for vector data have employed pseudo-curvatures, rather than real curvatures.  ...  In GIScience, however, the purpose of simplification is usually for displaying maps on multiple scales, which requires a dramatically faster algorithm for real-time simplification (Ivanov 2012) .  ... 
doi:10.1080/15481603.2015.1035528 fatcat:r7s4bgonxjfoxaaeveiyjtq55a

Integration of Constructive Solid Geometry and Boundary Representation (CSG-BRep) for 3D Modeling of Underground Cable Wells from Point Clouds

Ming Huang, Xueyu Wu, Xianglei Liu, Tianhang Meng, Peiyuan Zhu
2020 Remote Sensing  
In order to simplify the modeling process, first, point cloud simplification is performed; then, the point cloud main axis is extracted by OBB bounding box, and lastly the point cloud orientation correction  ...  Remote Sens. 2019, 11, x FOR PEER REVIEW 7 of 25 calculated in real-time until it is parallel to the main axis (it can be considered parallel if the angle between them is less than a certain degree).  ...  Remote Sens. 2019, 11, x FOR PEER REVIEW 7 of 25 calculated in real-time until it is parallel to the main axis (it can be considered parallel if the angle between them is less than a certain degree).  ... 
doi:10.3390/rs12091452 fatcat:6rp4fherqvbsxpoc2q6rkmmmi4

CamBall

Charles Woodward, Petri Honkamaa, Jani Jäppinen, Esa-Pekka Pyökkimies
2004 Proceedings of the 2004 ACM SIGCHI International Conference on Advances in computer entertainment technology - ACE '04  
The players see each other in the camera image, which is streamed real time over the network. The multicast implementation enables a network audience to view the game, too.  ...  We present a computer system for natural interaction in an augmented virtual environment, enabling people to play table tennis over Internet/LAN with real rackets.  ...  When the racket's location meets the virtual ball within given distance, a hit is registered, the new ball trajectory is computed, and the ball parameters (time of impact, new trajectory) are sent via  ... 
doi:10.1145/1067343.1067380 dblp:conf/ACMace/WoodwardHJP04 fatcat:z36dgyxidvfcrdc7ptnt6ai6fe

An Online Method for Trajectory Simplification Under Uncertainty of GPS

Guangwen Liu, Masayuki Iwai, Kaoru Sezaki
2013 IPSJ Online Transactions  
A novel simplification method for GPS trajectory is presented in this paper. Trajectory simplification can greatly improve the efficiency of data analysis (e.g., querying, clustering).  ...  Moreover, we define a new error metric -enclosed area metric -to evaluate the accuracy of simplified trajectories, which is proven more robust against the uncertainty of GPS.  ...  However, the problem we plan to solve in this work is trajectory simplification (i.e., data reduction) in real-time before data analysis.  ... 
doi:10.2197/ipsjtrans.6.65 fatcat:2dquvpl5brfjhkhvdcqzxjqxsm

GNSS Localization in Constraint Environment by Image Fusing Techniques

Ciprian David, Corina Nafornita, Vasile Gui, Andrei Campeanu, Guillaume Carrie, Michel Monnerat
2021 Remote Sensing  
almost all the time (except right at the beginning of the trajectory).  ...  Closer to our approach is the work presented in [12, 13] , meaning that real time constraints are taken into account.  ... 
doi:10.3390/rs13102021 fatcat:em3ygs44dvct5ojadvdzpiukna

Edge Computing-based Adaptable Trajectory Transmission Policy for Vessels Monitoring Systems of Marine Fishery

Jie Huang, Jian Wan, Jianjun Yu, Fengwei Zhu, Yongjian Ren
2020 IEEE Access  
The experimental results show that EC-ATT has better performance in typical cases, which not only reduces the average communication time but also strengthens the real-time availability of the VMS.  ...  In the traditional VMS, there are some deficiencies in the interaction and real-time communication between the land system and marine vessel.  ...  EXPERIMENTAL RESULTS The experiment analyzes the trajectory data from three aspects: trajectory quality, transmission times and real-time performance.  ... 
doi:10.1109/access.2020.2980322 fatcat:44ovf52xv5bkpfxgxqrnjcc37a

Enabling Image-Based Streamflow Monitoring at the Edge

Fabio Tosi, Matteo Rocca, Filippo Aleotti, Matteo Poggi, Stefano Mattoccia, Flavia Tauro, Elena Toth, Salvatore Grimaldi
2020 Remote Sensing  
By leveraging its standard parallel processing capability and exploiting functional simplifications, we achieve an accuracy comparable to state-of-the-art algorithms that typically require expensive computing  ...  First, it circumvents the need for wideband internet connections, which are expensive and impractical in remote environments.  ...  This procedure is not only time-consuming and cumbersome but it does not allow real-time monitoring, and cannot be used to trigger alarms when anomalous flow situations occur.  ... 
doi:10.3390/rs12122047 fatcat:hfyxccep35e5the2orlk3or3zy

Page 570 of The Journal of Ecology Vol. 96, Issue 4 [page]

2008 The Journal of Ecology  
Early models used to study LDD include several simplifications on the canonical structure of the flow field and seed trajectories.  ...  Such trajectories are intended to reproduce observed dispersal kernels at relatively long (i.e. seasonal and annual) time scales.  ... 

Trajectory Planning and Tracking Control of a Differential-Drive Mobile Robot in a Picture Drawing Application

Ching-Long Shih, Li-Chen Lin
2017 Robotics  
The reference trajectories are generated based on line simplification and B-spline approximation of digitized input curves obtained from Canny's edge-detection algorithm on a gray image.  ...  This paper proposes a method for trajectory planning and control of a mobile robot for application in picture drawing from images.  ...  The remote main controller can be either a personal computer (PC) or a smartphone, which automatically generates line drawing picture data from a camera in real time.  ... 
doi:10.3390/robotics6030017 fatcat:gmtiibxe6fh7dlqwksocgv4l5q

Energy Efficiency on Location Based Applications in Mobile Cloud Computing: A Survey

Xiao Ma, Yong Cui, Ivan Stojmenovic
2012 Procedia Computer Science  
Trajectory Simplification Trajectory simplification has been proposed as a means to reduce data size and communication costs caused by sending motion information.  ...  In EnTracked, trajectory simplification is viewed as a special case of line simplification (which has been thoroughly discussed in the computational geometry community).  ... 
doi:10.1016/j.procs.2012.06.074 fatcat:jrmpepheyfaj7bl5te32fdwwyi

An adaptive fuzzy sliding mode control for minimally invasive surgical robot's remote center mechanisms

Zou Shuizhong, Pan Bo, Fu Yili, Wang Shuguo, Guo Shuxiang
2014 2014 IEEE International Conference on Information and Automation (ICIA)  
The result of simulation and experiment show that the controller designed can provide a trajectory tracking with real-time, high-precision performance and strong robustness.  ...  Index Terms -Minimally invasive surgical robot, Remote centre mechanisms, Friction compensation, Adaptive fuzzy sliding mode control.  ...  Remote center mechanisms is shown below.  ... 
doi:10.1109/icinfa.2014.6932634 dblp:conf/icinfa/ZouPFWG14 fatcat:khvgfzh4tvd4tpp5brttyuoloq

Trajectory simplification

Dongxiang Zhang, Mengting Ding, Dingyu Yang, Yi Liu, Ju Fan, Heng Tao Shen
2018 Proceedings of the VLDB Endowment  
To bridge these gaps, we conduct so far the most comprehensive evaluation on trajectory simplification techniques.  ...  The mainstream compression technique is called trajectory simplification, that finds a subsequence to approximate the original trajectory and attempts to minimize the information loss under a distance  ...  The remaining points will be sent to the remote server for further processing and the communication overhead can be reduced due to trajectory simplification.  ... 
doi:10.14778/3213880.3213885 fatcat:wc22vtqmmbeb7mzz6gyfqvugna

MAPPING WITHOUT DYNAMIC: ROBUST LiDAR-SLAM FOR UGV MOBILE MAPPING IN DYNAMIC ENVIRONMENTS

Y. Cong, C. Chen, J. Li, W. Wu, S. Li, B. Yang
2020 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
In this research, a robust LiDAR-SLAM system is presented incorporated with a real-time dynamic objects removal module to improve the accuracy of 6 DOF pose estimation and precision of maps.  ...  Detection And Tracking of Moving Objects (DATMO) is essential and necessary for mobile mapping system to generate clean and accurate point clouds maps since dynamic targets in real-world scenarios will  ...  INTRODUCTION Simultaneous Localization and Mapping (SLAM) is designed to estimate accurate 6 DOF pose information of the platform itself as well as the positions of landmarks in a real-time manner.  ... 
doi:10.5194/isprs-archives-xliii-b1-2020-515-2020 fatcat:jjhjrzv6pnbvpihocoydxn3xby

Motion control architecture of a 4-fin U-CAT AUV using DOF prioritization

Taavi Salumae, Ahmed Chemori, Maarja Kruusmaa
2016 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)  
The real-time experimental results show high position tracking precision (depth RMS error: 1.9 cm; yaw RMS error: 2.5 • ) Comparative experiments justify the use of DOF prioritization.  ...  We demonstrate the benefits of this architecture by developing an remotely operated vehicle autopilot for depth and yaw using a nonlinear state feedback controller.  ...  Real-time experiments show precise trajectory tracking and large improvement with respect to cases without DOF prioritization. II.  ... 
doi:10.1109/iros.2016.7759218 dblp:conf/iros/SalumaeCK16 fatcat:2soeknxm55fjlnul553r2ie5ni
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