An analysis of biometric performance change over time: a multimodal perspective

In this study, we attempt to gain an understanding of whether or not a change in performance of a biometric system is subject-dependent. We will not attempt to explain the cause of performance change; we know that it is not only age-related, but is also dependent on biometric sample quality and habituation. What will become clear is that measuring the change in biometric performance is challenging, let alone explaining the causes of this change. However, we would challenge the common assertion that the performance of a biometric system systematically degrades overtime.