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In order to enroll or authenticate, user
needs to look into the device and focus on a given
point such as a small green light located within the device [11].
Major factor that affects the enrollment and authentication process of retina-scan
technology comes
from the
retina scanning quality.
Too
much movement of head or eye
and wearing glasses could reduce the system performance or even cause failure [10].
Iris
Recognition
Iris recognition technology uses a special camera that captures a black and white high-
resolution photograph of the iris. It examines the
user’s
iris
from a distance of a
few
feet
and extracts its distinctive texture. The goal of this technology is highly accurate
authentication based on a digitally represented image of the scanned eye.
In
order
use
the
device,
the
user
positions near the camera at a distance between 2-18
inches away depends on
the requirement. User
focuses
his or
her eyes to the center of
the device, looking the shadow of the eyes. This time the enrollment or authentication
immediately process [11].
Major
factor
affecting
the
performance
of
the
iris
recognition
technology
comes
from
the iris scanning quality. Too much movement of head or eye, wearing glasses or
colored contact lens could make the authentication or enrollment fail [10].
IriScan and Sensar are the companies that produce commercial
iris authentication
system [2].
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