Patent ID: 8611676

Claim:
An information processing apparatus comprising: feature extraction means for extracting a feature of a first class, wherein the first class comprises a first plurality of elements related to first data that is indicative of a feature of each of the first plurality of elements, wherein a second class comprises a second plurality of elements related to second data indicative of a feature of each of the second plurality of elements, and wherein the extracted feature of the first class is obtained by: determining a first set of data combinations obtained by taking out one or more pieces of the first data related to the first plurality of elements, determining a second set of data combinations obtained by taking out one or more pieces of the second data related to the second plurality of elements, and identifying a combination of data present in the first set of data combinations but absent from the second set of data combinations; and class classification means for classifying elements of the first plurality of elements into a class on the basis of an evaluation index indicative of a degree of relation between the identified combination of data and an element belonging to an extraction class from which the combination of data is identified.