Face Recognition

parathyroidsanchovyΤεχνίτη Νοημοσύνη και Ρομποτική

17 Νοε 2013 (πριν από 3 χρόνια και 11 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
faces.


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
Bowl.

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.



Video

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
-
scale
facial recognition cameras as
the ultimate “big brother.”

Effective?


“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
Hollywood.

-
Also too expensive.



What about other Biometric
systems?


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
found?


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
fraud.

Ex: Mexican Government (Presidential
Election)



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
place.


Last Video







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

THE END

Big Brother is watching you!!