1. A method implemented at least in part by a computer, the method comprising: calculating a competitive measure for verification of an unspecific person, the competitive measure being from a discriminative classifier based on a Bayesian competitive model, the discriminative classifier being adaptable to unknown new classes; and integrating the Bayesian competitive model with a generative verification in view of confidence measures, of the Bayesian competitive model and the generative verification, compared with a set of confidence criteria to make a decision regarding verification of the unspecific person, wherein: the confidence measures of the Bayesian competitive model and the generative verification are computed in view of an accuracy rate on a validation set to determine reliability of the Bayesian competitive model and the generative verification.