当前位置: X-MOL 学术ACM Trans. Algorithms › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Static and Streaming Data Structures for Fréchet Distance Queries
ACM Transactions on Algorithms ( IF 1.3 ) Pub Date : 2023-10-25 , DOI: 10.1145/3610227
Arnold Filtser 1 , Omrit Filtser 2
Affiliation  

Given a curve P with points in ℝd in a streaming fashion, and parameters ɛ > 0 and k, we construct a distance oracle that uses \(O(\frac{1}{\varepsilon })^{kd}\log \varepsilon ^{-1}\) space, and given a query curve Q with k points in ℝd returns in \(\tilde{O}(kd)\) time a 1+ɛ approximation of the discrete Fréchet distance between Q and P.

In addition, we construct simplifications in the streaming model, oracle for distance queries to a sub-curve (in the static setting), and introduce the zoom-in problem. Our algorithms work in any dimension d, and therefore we generalize some useful tools and algorithms for curves under the discrete Fréchet distance to work efficiently in high dimensions.



中文翻译:

用于 Fréchet 距离查询的静态和流数据结构

给定一条以流方式在 ℝ d中具有点的曲线P ,以及参数 ɛ > 0 和k,我们构造一个使用 \(O(\frac{1}{\varepsilon })^{kd}\log \ 的距离预言机varepsilon ^{-1}\) 空间,并且给定一条查询曲线Q,其中 ℝ d中有k 个点,在 \(\tilde{O}(kd)\) 时间内返回Q和之间的离散 Fréchet 距离的 1+ɛ 近似值P。 _

此外,我们在流模型中构建了简化,用于对子曲线的距离查询(在静态设置中),并引入了放大问题。我们的算法适用于任何维度d,因此我们推广了一些有用的工具和算法,用于离散 Fréchet 距离下的曲线,以便在高维度下有效地工作。

更新日期:2023-10-26
down
wechat
bug