Face Recognition

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17 Νοε 2013 (πριν από 4 χρόνια και 7 μήνες)

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Face Recognition

By: Thanh Do

Warren Ju

What is Face Recognition?

Facial recognition systems are computer
based security systems that are able to
automatically detect and identify human

The development stage for facial
recognition began in the late 1980s and
commercially available systems were
made available in the 1990s. While many
people first heard about facial recognition
after September 11th, 2001, football fans
were introduced to it at the 2004 Super

How does it work?

The first step for a facial
recognition system is to recognize
a human face and extract it fro the
rest of the scene.

Next, the system measures nodal
points on the face, (such as the
distance between the eyes, the
shape of the cheekbones and
other distinguishable features.)

These nodal points are then
compared to the nodal points
computed from a database of
pictures in order to find a match.


Pros of Face recognition

Anywhere that you can put a camera, you can potentially use a facial
recognition system. Many cameras can be installed throughout a location to
maximize security coverage without disrupting traffic flow.

Face recognition systems can be installed to require a person to explicitly
step up to a camera and get their picture taken, or to automatically survey
people as they pass by a camera. The later mode allows for scanning of
many people at the same time

Video or pictures can be replayed through a facial recognition system for
surveillance or forensics work after an event.

Face scanning is not noticeable, can be done at a comfortable distance and
does not require the user to touch anything.

Cons of Face recognition

Such systems may be fooled
by hats, beards, sunglasses
and face masks

Even changes of lighting and
camera angle can have a
significant effect on the
accuracy of 2D systems

Some people view mass
facial recognition cameras as
the ultimate “big brother.”


“false positives” which means wrongly
matching innocent people with photos in
the database

“false negatives” not catching people even
when their photo is in the database

if a subject's face is stored in the database,
a disguise or a minor change in
appearance or even an unusual facial
expression can confuse the system.

Mission Impossible?

Facial Disguise?

Only possible in

Also too expensive.

What about other Biometric

Though Iris Scan, Finger Print and Hand
Geometry biometric system have proven to be
effective, it requires cooperation from the person
being scanned.

Where can Face Recognition be

ATM machines
Face recognition at ATM
machines prevents fraud identification and
eliminates the usage of a personal
identification number (PIN)

Many people who don't use banks use
check cashing machines. Facial
recognition could eliminate possible
criminal activity.

Voting Places
This eliminate voter

Ex: Mexican Government (Presidential

Privacy V.S. National Security

The main issue
concerning face
recognition is Privacy
V.S. National Security

Giving your consent to
be scanned in order
to live in a safer

Last Video

Show of hands, who
believe this system would
work to catch terrorists
and criminals?


Big Brother is watching you!!