Abstract

Range-filtering approximate nearest neighbor (RFANN) search is attracting increasing attention in academia and industry. Given a set of data objects, each being a pair of a high-dimensional vector and a numeric value, an RFANN query with a vector and a numeric range as parameters returns the data object whose numeric value is in the query range and whose vector is nearest to the query vector. To process this query, a recent study proposes to build \(O(n^2)\) dedicated graph-based indexes for all possible query ranges to enable efficient processing on a database of \(n\) objects. As storing all these indexes is prohibitively expensive, the study constructs compressed indexes instead, which reduces the memory consumption considerably. However, this incurs suboptimal performance because the compression is lossy. In this study, instead of materializing a compressed index for every possible query range in preparation for querying, we materialize graph-based indexes, called elemental graphs,

Authors

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Tags

  • ANN Search

Stats

  • citations12
  • S2 citationsβ€”
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  • heat score8.35
  • arxiv keyxu2024irangegraph

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