How are the FAR and FRR minimized in a biometric system?
The false acceptance rate (FAR) can be adjusted in the recognition algorithm via the acceptance threshold – the higher the acceptance threshold, the lower the FAR. Raising the acceptance threshold, however also raises the FRR. Therefore, the goal must be to have as small an FAR as possible for any given FRR, and vice versa. There are certain factors which primarily influence the FAR, while others mainly affect the FRR.
