Measuring Biometric Sample Quality in terms of Biometric Feature Information in Iris Images

Figure 6

Biometric iris feature information as a function of iris angle (in degrees). It is seen that there is a slight difference in the iris BI as the angle varies; however, the BI plot shows that the iris contains random patterns with similar amount of information independent of the angle at which an iris segment is extracted prior to processing. A 4th-order polynomial curve fit is shown over the BI graph in order to demonstrate the curve trend.