منابع مشابه
Compressing Spatio-temporal Trajectories
A trajectory is a sequence of locations, each associated with a timestamp, describing the movement of a point. Trajectory data is becoming increasingly available and the size of recorded trajectories is getting larger. In this paper we study the problem of compressing planar trajectories such that the most common spatio-temporal queries can still be answered approximately after the compression ...
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A growing number of medical datasets now contain both a spatial and a temporal dimension. Trajectories, from tools or body features, are thus becoming increasingly important for their analysis. In this paper, we are interested in recovering the spatial and temporal differences between trajectories coming from different datasets. In particular, we address the case of surgical gestures, where tra...
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We propose a novel class of kernels to identify tactical patterns in multi-trajectory data such as soccer games. Formally, we introduce a group of R-convolution kernels called Spatio-Temporal Convolution Kernels composed of a temporal and a spatial kernel. The particular choice of the component kernels depends on the application at hand. For the purpose of clustering player and ball trajectorie...
متن کاملIndexing Spatio-Temporal Trajectories with Orthogonal Polynomials
In this paper we consider d-dimensional spatiotemporal data (d 1) and ways to approximate and index it. We focus on indexing such data for similarity matching using orthogonal polynomial approximations. There are many ways to choose an approximation scheme for d-dimensional spatiotemporal trajectories. Some of them have been studied before. In this paper we extend the approach proposed in [6] ...
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Many new applications involving moving objects require the collection and querying of trajectory data, so efficient indexing methods are needed to support complex spatio-temporal queries on such data. Current work in this domain has used MBRs to approximate trajectories, which fail to capture some basic properties of trajectories, including smoothness and lack of internal area. This mismatch le...
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ژورنال
عنوان ژورنال: Computational Geometry
سال: 2009
ISSN: 0925-7721
DOI: 10.1016/j.comgeo.2009.02.002