RECOGNITION SYSTEM DESIGN
This section explains about the Biometric system
design and its process:
Enrolment: Process through which the raw biometric data is
captured. Depending on the technology being implemented, the
data captured could be a facial image, a fingerprint, voice data,
iris etc.
Feature extraction: The stage in which the raw data acquired
during enrolment is processed to locate and encode the
distinctive characteristics on which the system operates.
Template creation: A template is “a small file derived from the
distinctive features of a user’s biometric data” [5]. It is
considered as the building block of a biometric system, and in
most cases templates are proprietary to each vendor and
technology. Templates can occur in two forms:
Enrolment templates: Generated during the user’s first
interaction with the system and stored in the enrolment database
for future use.
Match templates: Generated during identification or
authorization attempts, to be compared against enrolment
templates, and generally discarded after the matching process.
This will lead to two different states called Positive Match
which indicates a person is who he/she says he/she and Negative
Match which occurs when an authorized user is rejected. The
above process is illustrated as follows