Long-query retrieval
US8326820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jul 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24534
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Described herein is a technology that facilitates efficient large-scale similarity-based retrieval. In several embodiments documents, images, and/or other multimedia files are compactly represented and efficiently indexed to enable robust search using a long-query in a large-scale corpus. As described herein, these techniques include performing decomposition of a file, e.g., a document or document-like representation. The techniques use dimension reduction to obtain three parts, topic-related words (major semantics), document specific words (minor semantics), and background words, representing the major semantics in a feature vector and the minor semantics as keywords. Using the techniques described, file vectors are matched in a topic model and the results ranked based on the keywords.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.