arXiv
Open Access
2019
Accurate and Fast Retrieval for Complex Non-metric Data via Neighborhood Graphs
Leonid Boytsov
Eric Nyberg
Abstrak
We demonstrate that a graph-based search algorithm-relying on the construction of an approximate neighborhood graph-can directly work with challenging non-metric and/or non-symmetric distances without resorting to metric-space mapping and/or distance symmetrization, which, in turn, lead to substantial performance degradation. Although the straightforward metrization and symmetrization is usually ineffective, we find that constructing an index using a modified, e.g., symmetrized, distance can improve performance. This observation paves a way to a new line of research of designing index-specific graph-construction distance functions.
Penulis (2)
L
Leonid Boytsov
E
Eric Nyberg
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2019
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- en
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- arXiv
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- Open Access ✓