Classification system and learning system

A non-transitory computer-readable medium storing a program for causing a computer provided in a classification system to function as:

• a score calculation unit configured to calculate respective scores of predetermined classes from input data;
• a determination unit configured to determine whether the input data belongs to anyone of the classes, based on the respective scores of the classes, which are calculated by the score calculation unit;
• and
• a classification unit configured to determine to which one of the classes the input data belongs, based on the respective scores when the determination unit determines that the input data belongs to anyone of the classes, and to determine that the input data belongs to an unknown class that is other than the classes when the determination unit determines that the input data does not belong to the classes,
• wherein the determination unit includes:
• trained determination models, corresponding to respective classes, configured to determine whether a vector including the respective scores of the classes belongs to a corresponding class;
• and
• a selection unit configured to supply a vector including the respective scores, which are calculated from the input data, to one of the determination models corresponding to the class with the largest score among the respective scores of the classes, which are calculated by the score calculation unit, and
• wherein a determination result by the one of the determination models, to which the vector is supplied, is supplied to the classification unit.