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Appears in Collections:Computing Science and Mathematics Conference Papers and Proceedings
Author(s): Connor, Richard
Dearle, Alan
Title: Querying Metric Spaces with Bit Operations
Citation: Connor R & Dearle A (2018) Querying Metric Spaces with Bit Operations. In: Similarity Search and Applications. SISAP 2018. Lecture Notes in Computer Science, 11223. 11th International Conference on Similarity Search and Applications - SISAP 2018, Lima, Peru, 07.10.2018-09.10.2018. Cham, Switzerland: Springer, pp. 33-46.
Issue Date: 31-Dec-2018
Series/Report no.: Lecture Notes in Computer Science, 11223
Conference Name: 11th International Conference on Similarity Search and Applications - SISAP 2018
Conference Dates: 2018-10-07 - 2018-10-09
Conference Location: Lima, Peru
Abstract: Metric search techniques can be usefully characterised by the time at which distance calculations are performed during a query. Most exact search mechanisms use a "just-in-time" approach where distances are calculated as part of a navigational strategy. An alternative is to use a "one-time" approach, where distances to a fixed set of reference objects are calculated at the start of each query. These distances are typically used to re-cast data and queries into a different space where querying is more efficient, allowing an approximate solution to be obtained. In this paper we use a "one-time" approach for an exact search mechanism. A fixed set of reference objects is used to define a large set of regions within the original space, and each query is assessed with respect to the definition of these regions. Data is then accessed if, and only if, it is useful for the calculation of the query solution. As dimensionality increases, the number of defined regions must increase, but the memory required for the exclusion calculation does not. We show that the technique gives excellent performance over the SISAP benchmark data sets, and most interestingly we show how increases in dimensionality may be countered by relatively modest increases in the number of reference objects used.
Status: AM - Accepted Manuscript
Rights: This is a post-peer-review, pre-copyedit version of a paper published in Marchand-Maillet S., Silva Y., Chávez E. (eds) Similarity Search and Applications. SISAP 2018. Lecture Notes in Computer Science, vol 11223. The final authenticated version is available online at:

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