US 12,423,331 B2
Classification apparatus, classification method, and recording medium
Taiki Miyagawa, Tokyo (JP); and Akinori Ebihara, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 18/708,262
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Nov. 17, 2021, PCT No. PCT/JP2021/042149
§ 371(c)(1), (2) Date May 8, 2024,
PCT Pub. No. WO2023/089678, PCT Pub. Date May 25, 2023.
Prior Publication US 2025/0005045 A1, Jan. 2, 2025
Int. Cl. G06F 16/00 (2019.01); G06F 16/28 (2019.01)
CPC G06F 16/285 (2019.01) 18 Claims
OG exemplary drawing
 
1. A classification apparatus comprising
at least one processor carrying out:
an acquiring process of acquiring series data; and
a class label assigning process of assigning a class label to each piece of element data contained in the series data, by repeatedly applying quickest change detection to the series data,
in the class label assigning process, the at least one processor
sequentially calculates a statistic obtained by referring to each piece of element data contained in the series data and compares the statistic calculated to a threshold, to determine a class transition, and
each time the statistic reaches the threshold,
performs:
initialization of the statistic; and
redefinition of an initial distribution of a density function used for calculating the statistic.