Patent ID: 7203431
Filing Date: 2007-04-10
Classification: G06F,G06K

Abstract:
1. An abnormality determining method comprising: an information storing step for storing information about an object in information storage means; an information obtaining step for obtaining information about an object using information obtaining means; and a determining step for determining the presence of an abnormality in a detection subject on the basis of the stored information in said information storage means and the obtained information obtained by said information obtaining means, wherein, in said information storing step, a normal group data set, which is a collection of normal value combinations of grouped information constituted by a plurality of different types of information, is stored in said information storage means, in said information obtaining step, at least two or more sets of grouped information, comprising first grouped information constituted by a plurality of different types of information and second grouped information having a different combination to that of said first grouped information, are obtained by said information obtaining means, and in said determining step, a Mahalanobis distance is determined for each set of grouped information on the basis of said normal group data set and the obtained results of each set of grouped information, and used to determine the presence of an abnormality in the detection subject.