Content-Based Information Retrieval
First Claim
1. A computer-implemented method of similar item retrieval comprising:
- receiving a query item;
analyzing content of the query item;
dynamically forming a classifier at query time on the basis of the query item'"'"'s content and a training set of items; and
using the classifier to select a plurality of items from a database of items
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Accused Products
Abstract
Content-based information retrieval is described. In an example, a query item such as an image, document, email or other item is presented and items with similar content are retrieved from a database of items. In an example, each time a query is presented, a classifier is formed based on that query and using a training set of items. For example, the classifier is formed in real-time and is formed in such a way that a limit on the proportion of the items in the database that will be retrieved is set. In an embodiment, the query item is analyzed to identify tokens in that item and subsets of those tokens are selected to form the classifier. For example, the subsets of tokens are combined using Boolean operators in a manner which is efficient for searching on particular types of database.
120 Citations
20 Claims
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1. A computer-implemented method of similar item retrieval comprising:
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receiving a query item; analyzing content of the query item; dynamically forming a classifier at query time on the basis of the query item'"'"'s content and a training set of items; and using the classifier to select a plurality of items from a database of items - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A content-based image search apparatus comprising:
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an input arranged to receive a query image; a content analysis engine arranged to identify tokens in the query image; a classifier construction engine arranged to form a classifier on the basis of the identified tokens in the query image and on the basis of a training set of images; a processor arranged to use the formed classifier to classify images from a database of images according to their similarity to the query image; an output arranged to provide images from the database on the basis of their classification. - View Dependent Claims (14, 15, 16, 17)
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18. One or more device-readable media with device-executable instructions for performing steps comprising:
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receiving a query item; analyzing content of the query item; dynamically forming a classifier at query time on the basis of the query item'"'"'s content and the basis of properties of that content with respect to a training set of items, some of which are known to be similar to one another; and using the classifier to select a plurality of items from a database of items. - View Dependent Claims (19, 20)
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Specification