A discriminator based on supervised learning includes a data expanding unit and a discriminating unit. The data expanding unit performs data expansion on unknown data which is an object to be discriminated in such a manner that a plurality of pieces of pseudo known data are generated. The discriminating unit applies the plurality of pieces of unknown pseudo data that has been expanded by the data expansion unit to a discriminative model so as to discriminate the plurality of pieces of pseudo unknown data, and integrates discriminative results of the plurality of pieces of pseudo unknown data to perform class classification such that the unknown data is classified into classes.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A discriminator based on supervised learning, the discriminator comprising: a data expanding unit that performs data expansion on unknown data that is an object to be discriminated, in such a manner that a plurality of pieces of pseudo known data are generated; and a discriminating unit that applies the plurality of pieces of unknown pseudo data that has been expanded by the data expansion unit to a predetermined discriminative model so as to discriminate the plurality of pieces of pseudo unknown data, and integrates discriminative results of the plurality of pieces of pseudo unknown data to perform class classification such that the unknown data is classified into classes. 2. The discriminator according to claim 1, wherein: the data expanding unit performs the data expansion on the unknown data using the same method as data expansion performed on training data when the discriminative model is generated. 3. The discriminator according to claim 2, wherein: the discriminating unit performs the class classification based on expected values derived by applying the plurality of pieces of unknown pseudo data to the discriminative model. 4. The discriminator according to claim 3, wherein: the discriminating unit performs the class classification without applying the unknown data to the discriminative model. 5. The discriminator according to claim 4, wherein: the data expanding unit performs the data expansion on the unknown data using random numbers. 6. The discriminator according to claim 1, wherein: the discriminating unit performs the class classification based on expected values derived by applying the plurality of pieces of unknown pseudo data to the discriminative model. 7. The discriminator according to claim 1, wherein: the discriminating unit performs the class classification without applying the unknown data to the discriminative model. 8. The discriminator according to claim 1, wherein: the data expanding unit performs the data expansion on the unknown data using random numbers. 9. A computer-readable storage medium storing a discrimination program for enabling a computer to function as a discriminator based on supervised learning, the discriminator comprising: a data expanding unit that performs data expansion on unknown data that is an object to be discriminated in such a manner that a plurality of pieces of pseudo known data are generated; and a discriminating unit that applies the plurality of pieces of unknown pseudo data that has been expanded by the data expansion unit to a predetermined discriminative model so as to discriminate the plurality of pieces of pseudo unknown data, and integrates discriminative results of the plurality of pieces of pseudo unknown data to perform class classification such that the unknown data is classified into classes. 10. A discrimination method based on supervised learning, the discrimination method comprising: performing, by a data expansion unit, data expansion on unknown data that is an object to be discriminated in such a manner that a plurality of pieces of pseudo known data are generated; applying, by a discriminating unit, the plurality of pieces of unknown data that has been expanded by the data expansion unit to a predetermined discriminative model so as to discriminate the plurality of pieces of pseudo unknown data; and integrating, by the discriminating unit, discriminative results of the plurality of pieces of pseudo unknown to perform class classification such that the unknown data is classified into classes.