AUTOMATIC DOCUMENT CLASSIFICATION DEVICE, LEARNING DEVICE, CLASSIFICATION DEVICE, AUTOMATIC DOCUMENT CLASSIFICATION METHOD, LEARNING METHOD, CLASSIFICATION METHOD AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an automatic document classification device which can form a vector space where topics are precisely reflected and which can appropriately execute classification. ;SOLUTION: The automatic document classification device selects a valid word from a learning document (valid word selection part 103). The number of the valid words contained in respective paragraphs is obtained by referring to the learning document and the valid word (intra-paragraph valid word number calculation part 105). The intra-paragraph cooccurrence frequency of the group of the respective valid words is obtained by using the number of intra-paragraph valid words (intra-paragraph cooccurrence calculation part 107). The valid word vectors of the respective valid words are obtained from obtained intra- paragraph cooccurrence frequency, and the document vectors are obtained on the learning document and the document being a classification object by referring to the valid word vectors. The folder vectors of the respective categories, which are obtained from the document vector of the learning document, are compared with the document vector of the document being the classification object. The category to which the document being the classification object belongs is decided in accordance with the compared result.;COPYRIGHT: (C)1999,JPO