In addition to accuracy, a biometric system has additional factors that
determine its effectiveness. Which one of the following listed items is
NOT one of these additional factors?

A.
Corpus

B.
Throughput rate

C.
Enrollment time

D.
Acceptability

Explanation:
A corpus is a biometric term that refers to collected biometric
images. The corpus is stored in a database of images. Potential
sources of error are the corruption of images during collection and
mislabeling or other transcription problems associated with the database.
Therefore, the image collection, process and storage must be
performed carefully with constant checking. These images are collected
during the enrollment process and thus, are critical to the correct
operation of the biometric device. In enrollment, images are
collected and features are extracted, but no comparison occurs. The
information is stored for use in future comparison steps. Answer a,
the throughput rate, refers to the rate at which individuals, once
enrolled, can be processed by a biometric system. If an individual is
being authenticated, the biometric system will take a sample of the
individual’s characteristic to be evaluated and compare it to a template.
A metric called distance is used to determine if the sample
matches the template. Distance is the difference between the quantitative
measure of the sample and the template. If the distance falls
within a threshold value, a match is declared. If not, there is no
match.
* Answer “acceptability” is determined by privacy issues, invasiveness,
and psychological and physical comfort when using the
biometric system.
*”Enrollment time” is the time it takes to initially
register with a system by providing samples of the biometric
characteristic to be evaluated.