Collaborative recommendations using item-to-item similarity mappings
US6266649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q30/0633
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A recommendations service recommends items to individual users based on a set of items that are known to be of interest to the user, such as a set of items previously purchased by the user. In the disclosed embodiments, the service is used to recommend products to users of a merchant's Web site. The service generates the recommendations using a previously-generated table which maps items to lists of "similar" items. The similarities reflected by the table are based on the collective interests of the community of users. For example, in one embodiment, the similarities are based on correlations between the purchases of items by users (e.g., items A and B are similar because a relatively large portion of the users that purchased item A also bought item B). The table also includes scores which indicate degrees of similarity between individual items. To generate personal recommendations, the service retrieves from the table the similar items lists corresponding to the items known to be of interest to the user. These similar items lists are appropriately combined into a single list, which is then sorted (based on combined similarity scores) and filtered to generate a list of recommended …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.