CLASSIFICATION SYSTEM, METHOD, AND PROGRAM

Title:

CLASSIFICATION SYSTEM, METHOD, AND PROGRAM

Document Type and Number:

WIPO Patent Application WO/2022/180796

Kind Code:

A1

Abstract:

In the present invention, an input means 181 receives the input of: test data, which is document data to be classified; a hierarchical structure in which the lowermost layer node indicates the class of a classification destination; and a classification score for a known class, which is a class in which classified document data is present, as the classification score indicating the probability with which the test data is classified into each class of the hierarchical structure. An unknown class score calculation means 182 calculates a classification score for an unknown class, which is a class in which no classified documents are present, on the basis of the uniformity of the classification scores for each known class in the hierarchical structure. A matching score calculation means 183 calculates a matching score indicating the similarity of the test data with a label of a known class or the label of the unknown class. A final classification score calculation means 184 calculates a final classification score indicating the probability with which the test data is classified into a class, the final classification score increasing as the classification score of the known class or the classification score of the unknown class, and the matching score, increase.

Inventors:

YANO TARO (JP)
TAKEOKA KUNIHIRO (JP)
OYAMADA MASAFUMI (JP)

Application Number:

PCT/JP2021/007385

Publication Date:

September 01, 2022

Filing Date:

February 26, 2021

Export Citation:

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Assignee:

NEC CORP (JP)

International Classes:

G06F16/35

Foreign References:

JP2021022343A	2021-02-18
JPH096799A	1997-01-10
JP2020052644A	2020-04-02
JP2012155524A	2012-08-16