Patent ID: 7024400
Filing Date: 2006-04-04
Classification: G06F

Abstract:
1. A method of setting up a DLSI space-based classifier to be stored in a computer storage device for document classification using a computer, and using said classifier by said computer to classify a document according to a plurality of clusters within a database, comprising the steps of: preprocessing documents using said computer to distinguish terms of a word and a noun phrase from stop words; constructing system terms by setting up a term list as well as global weights using said computer; normalizing document vectors of collected documents, as well as centroid vectors of each cluster using said computer; constructing a differential term by intra-document matrix D decomposing the differential term by intra-document matrix D setting up a likelihood function of intra-differential document vector using said computer; constructing a term by extra-document matrix D decomposing D setting up a likelihood function of extra-differential document vector using said computer; setting up a posteriori function using said computer; and said computer using said DLSI space-based classifier, as set up in the foregoing steps, to classify the document as belonging to one of the plurality of clusters within the database.