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6
exiStiNg methodS
forelimiNatiNg effectS
of the eyelidS
In this chapter we propose to present the existing methods used
for the elimination of the effects of upper and lower eyelids that
can hide a part of the iris of the eye. We will detail three simula-
tions of these methods. Based on these approaches, in Chapter 7
we will present our most effective method for such treatments.
6.1 Introduction
Normalization is an important phase in the process of authentication.
In addition to the functions detailed in previous chapters (cf.Chapter 2,
Section 2.5.3), this phase leads to eliminating the effects of upper and
lower eyelids. Several researchers have proposed various methods to
solve these problems (cf. Chapter 2, Section 2.5.6). We present th ...