Sample data generation device, sample data generation method, and sample data generation program

An acquisition unit (10) acquires normal sample data and non-normal sample data. A model generation unit (120) generates a normal model which expresses the normal sample data. A modification unit (141) generates a non-normal feature vector of the non-normal sample data and generates a non-normal modified vector by modifying an element of the non-normal feature vector. A verification unit (142), ifthe non-normal modified vector and the normal model are similar, performs processing using sample data indicated by the non-normal modified vector. Further, the verification unit (142) verifies whether or not an abnormal event is being detected by means of a detection device. If it has been verified that an abnormal event is not being detected, the verification unit (142) determines whether or not an abnormal event exists, independently of the detection device. If it is determined that an abnormal event exists, the verification unit (142) stores, in a storage unit (150), the sample data indicated by the non-normal mo