2. Hand Geometry
Hand geometry is a biometric technique,
which identifies person through the hand
geometry measurements.
Some geometric structures related to a
human hand (e.g., length and width of
hand) are relatively invariant to an
individual.
3. Where used
Access Control
Used to access Health clubs, Day care
centers,
Laboratories, Prisons, etc.
Time & Attendance
Personal Identification
7. Features extracted
Generate a feature vector Vh, including 5 lengths of fingers, 10 widths
of fingers, and the width between v1 to v2.
8. Performance Evaluation
FAR and FRR stands for false acceptance rate
and false rejection rate, respectively. The FAR
and FRR are defined as below:
Equal error rate (EER) where FAR = FRR.
9. Advantage
Almost all of the working population has hand
Fast capture/processing: It use low-computational
cost
algorithms, which leads to fast results.
Medium cost as it need a platform and a medium
resolution CCD camera
Very easy and attractive to users: leading to
nearly null user rejection
10. Advantage
Less invasion of privacy and templates cannot
be “reverse engineered” to identify users
Simple method of sensing
Computations are easy wherefore system is easy
to build
Easy to integrate with other biometrics as
fingerprint
Storage efficient (9-25 bytes)
11. Limitations
Large size of hand geometry devices
Can only be used for verification
Many hands are very similar in shape and size,
system may confuse someone else’s hand for yours
Would have to be combined with another system in
order for complete identification
Training required
Some people do not have hands or measurable
fingers for various reasons
12. Comparison between biometrics
Biometric Type Accuracy Ease of Use User Acceptance
Fingerprint High Medium Low
Hand Geometry Medium High Medium
Voice Medium High High
Retina High Low Low
Iris Medium Medium Medium
Signature Medium Medium High
Face Low High High
