The frequency transfer functions are defined for sinusoidal inputs having all possible frequencies. They are obtained from (9.1) by simply setting , that is (9.1) Typical diagrams for the magnitude and phase of the open-loop frequency transfer function are presented in Figure 9.1. 1 0 (a) (b) ω cg ω cg ω cp ω ω ω cp-180 o 0 ¡ o 1/Gm G(jω)H(jω) arg ¢ G(jω)H(jω) Pm Figure 9.1: Magnitude (a) and p...

In the always expanding field of biometrics the choice of which biometric modality or modalities to use, is a difficult one. While a particular biometric modality might offer superior discriminative properties (or be more stable over a longer period of time) when compared to another modality, the ease of its acquisition might be quite difficult in comparison. As such, the use of the human face ...