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Reseach Article

Optimal Load Factor for Approximate Nearest Neighbor Search under Exact Euclidean Locality Sensitive Hashing

by Ruben Buaba, Abdollah Homaifar, Eric Kihn
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 69 - Number 21
Year of Publication: 2013
Authors: Ruben Buaba, Abdollah Homaifar, Eric Kihn
10.5120/12096-8258

Ruben Buaba, Abdollah Homaifar, Eric Kihn . Optimal Load Factor for Approximate Nearest Neighbor Search under Exact Euclidean Locality Sensitive Hashing. International Journal of Computer Applications. 69, 21 ( May 2013), 22-31. DOI=10.5120/12096-8258

@article{ 10.5120/12096-8258,
author = { Ruben Buaba, Abdollah Homaifar, Eric Kihn },
title = { Optimal Load Factor for Approximate Nearest Neighbor Search under Exact Euclidean Locality Sensitive Hashing },
journal = { International Journal of Computer Applications },
issue_date = { May 2013 },
volume = { 69 },
number = { 21 },
month = { May },
year = { 2013 },
issn = { 0975-8887 },
pages = { 22-31 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume69/number21/12096-8258/ },
doi = { 10.5120/12096-8258 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T21:30:55.321913+05:30
%A Ruben Buaba
%A Abdollah Homaifar
%A Eric Kihn
%T Optimal Load Factor for Approximate Nearest Neighbor Search under Exact Euclidean Locality Sensitive Hashing
%J International Journal of Computer Applications
%@ 0975-8887
%V 69
%N 21
%P 22-31
%D 2013
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Locality Sensitive Hashing (LSH) is an index-based data structure that allows spatial item retrieval over a large dataset. The performance measure, ?, has significant effect on the computational complexity and memory space requirement to create and store items in this data structure respectively. The minimization of ? at a specific approximation factor c, is dependent on the load factor, ?. Over the years,?=4has been used by researchers. In this paper, we demonstratethat the choice of?=4does not guarantee low computational complexity and low memory space of the data structure under the LSH scheme. To guarantee low computational complexity and low memory space, we propose?=5. Experiments on the Defense Meteorological Satellite Program imagery datasethave shown that?=5saves more than 75%on memory space; cuts the computational complexity by more than 70%andanswers query two times faster on the average compared to that of?=4.

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Index Terms

Computer Science
Information Sciences

Keywords

Approximate Nearest Neighbor Exact Nearest Neighbor ApproximationFactor Performance Measure Optimal Load Factor