<s>
Face	B-General_Concept
detection	I-General_Concept
is	O
a	O
computer	O
technology	O
being	O
used	O
in	O
a	O
variety	O
of	O
applications	O
that	O
identifies	O
human	O
faces	O
in	O
digital	O
images	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
also	O
refers	O
to	O
the	O
psychological	O
process	O
by	O
which	O
humans	O
locate	O
and	O
attend	O
to	O
faces	O
in	O
a	O
visual	O
scene	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
can	O
be	O
regarded	O
as	O
a	O
specific	O
case	O
of	O
object-class	B-General_Concept
detection	I-General_Concept
.	O
</s>
<s>
In	O
object-class	B-General_Concept
detection	I-General_Concept
,	O
the	O
task	O
is	O
to	O
find	O
the	O
locations	O
and	O
sizes	O
of	O
all	O
objects	O
in	O
an	O
image	O
that	O
belong	O
to	O
a	O
given	O
class	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
simply	O
answers	O
two	O
question	O
,	O
1	O
.	O
are	O
there	O
any	O
human	O
faces	O
in	O
the	O
collected	O
images	O
or	O
video	O
?	O
</s>
<s>
A	O
reliable	O
face-detection	O
approach	O
based	O
on	O
the	O
genetic	B-Algorithm
algorithm	I-Algorithm
and	O
the	O
eigen-face	B-General_Concept
technique	O
:	O
</s>
<s>
Then	O
the	O
genetic	B-Algorithm
algorithm	I-Algorithm
is	O
used	O
to	O
generate	O
all	O
the	O
possible	O
face	O
regions	O
which	O
include	O
the	O
eyebrows	O
,	O
the	O
iris	O
,	O
the	O
nostril	O
and	O
the	O
mouth	O
corners	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
is	O
used	O
in	O
biometrics	O
,	O
often	O
as	O
a	O
part	O
of	O
(	O
or	O
together	O
with	O
)	O
a	O
facial	O
recognition	O
system	O
.	O
</s>
<s>
Some	O
recent	O
digital	O
cameras	O
use	O
face	B-General_Concept
detection	I-General_Concept
for	O
autofocus	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
is	O
also	O
useful	O
for	O
selecting	O
regions	O
of	O
interest	O
in	O
photo	O
slideshows	O
that	O
use	O
a	O
pan-and-scale	O
Ken	O
Burns	O
effect	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
is	O
gaining	O
the	O
interest	O
of	O
marketers	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
can	O
be	O
used	O
as	O
part	O
of	O
a	O
software	O
implementation	O
of	O
emotional	O
inference	O
.	O
</s>
<s>
Face	B-General_Concept
detection	I-General_Concept
is	O
essential	O
for	O
the	O
process	O
of	O
language	O
inference	O
from	O
visual	O
cues	O
.	O
</s>
<s>
Automated	B-General_Concept
lip	I-General_Concept
reading	I-General_Concept
has	O
applications	O
to	O
help	O
computers	O
determine	O
who	O
is	O
speaking	O
which	O
is	O
needed	O
when	O
security	O
is	O
important	O
.	O
</s>
