Patent Document ID: 9031882
Application ID: 12702638
Patent Status: 1

Claim One:
1. A determination device comprising: a region information recording unit that records therein region information regarding a closed region corresponding to a data distribution shape of a same category within a feature space, the closed region with an outer surface being formed by a plurality of nodes placed in accordance with the data distribution shape and line segments connecting the plurality of nodes and being a definitely closed and finite region in which every node is used to enclose the closed region; a region-surface distance calculating unit that: detects a closest node to a determination target from the plurality of nodes of the closed region, determines the line segments that are connected to the closest node, calculates perpendicular distances between the determination target and points of intersection on the line segments connected to the closest node within the feature space, and calculates a minimum perpendicular distance from the calculated perpendicular distances, wherein if the perpendicular distances do not exist between the determination target and the points of intersection on the line segments connected to the closest node, a distance between the determination target and the closest node is substituted for the minimum perpendicular distance; and a category deciding unit that decides a category of the determination target corresponding to the minimum perpendicular distance between the determination target and the point of intersection on the line segment connected to the closest node of the closed region within the feature space.