<s>
An	O
image	B-Algorithm
is	O
a	O
visual	O
representation	O
of	O
something	O
.	O
</s>
<s>
An	O
image	B-Algorithm
can	O
be	O
an	O
artifact	O
,	O
such	O
as	O
a	O
photograph	O
or	O
other	O
two-dimensional	O
picture	O
,	O
that	O
resembles	O
a	O
subject	O
.	O
</s>
<s>
In	O
the	O
context	O
of	O
signal	O
processing	O
,	O
an	O
image	B-Algorithm
is	O
a	O
distributed	O
amplitude	B-Application
of	O
color(s )	O
.	O
</s>
<s>
In	O
optics	B-Algorithm
,	O
the	O
term	O
"	O
image	B-Algorithm
"	O
may	O
refer	O
specifically	O
to	O
a	O
2D	O
image	B-Algorithm
.	O
</s>
<s>
An	O
image	B-Algorithm
does	O
not	O
have	O
to	O
use	O
the	O
entire	O
visual	O
system	O
to	O
be	O
a	O
visual	O
representation	O
.	O
</s>
<s>
A	O
popular	O
example	O
of	O
this	O
is	O
of	O
a	O
greyscale	O
image	B-Algorithm
,	O
which	O
uses	O
the	O
visual	O
system	O
's	O
sensitivity	O
to	O
brightness	O
across	O
all	O
wavelengths	O
,	O
without	O
taking	O
into	O
account	O
different	O
colors	O
.	O
</s>
<s>
A	O
black	O
and	O
white	O
visual	O
representation	O
of	O
something	O
is	O
still	O
an	O
image	B-Algorithm
,	O
even	O
though	O
it	O
does	O
not	O
make	O
full	O
use	O
of	O
the	O
visual	O
system	O
's	O
capabilities	O
.	O
</s>
<s>
Images	O
may	O
be	O
two	O
or	O
three-dimensional	O
,	O
such	O
as	O
a	O
photograph	O
or	O
screen	O
display	O
,	O
or	O
three-dimensional	O
,	O
such	O
as	O
a	O
statue	O
or	O
hologram	B-Algorithm
.	O
</s>
<s>
They	O
may	O
be	O
captured	O
by	O
optical	B-Algorithm
devices	O
–	O
such	O
as	O
cameras	O
,	O
mirrors	O
,	O
lenses	O
,	O
telescopes	O
,	O
microscopes	O
,	O
and	O
natural	O
objects	O
and	O
phenomena	O
,	O
such	O
as	O
the	O
human	O
eye	O
or	O
water	O
.	O
</s>
<s>
The	O
word	O
'	O
image	B-Algorithm
 '	O
is	O
also	O
used	O
in	O
the	O
broader	O
sense	O
of	O
any	O
two-dimensional	O
figure	O
such	O
as	O
a	O
map	O
,	O
graph	B-Application
,	O
pie	B-Application
chart	I-Application
,	O
painting	O
,	O
or	O
banner	B-Device
.	O
</s>
<s>
A	O
volatile	O
image	B-Algorithm
is	O
one	O
that	O
exists	O
only	O
for	O
a	O
short	O
period	O
of	O
time	O
.	O
</s>
<s>
This	O
may	O
be	O
a	O
reflection	O
of	O
an	O
object	O
by	O
a	O
mirror	O
,	O
a	O
projection	O
of	O
a	O
camera	B-Algorithm
obscura	I-Algorithm
,	O
or	O
a	O
scene	O
displayed	O
on	O
a	O
cathode-ray	B-Device
tube	I-Device
.	O
</s>
<s>
A	O
fixed	O
image	B-Algorithm
,	O
also	O
called	O
a	O
hard	B-General_Concept
copy	I-General_Concept
,	O
is	O
one	O
that	O
has	O
been	O
recorded	O
on	O
a	O
material	O
object	O
,	O
such	O
as	O
paper	O
or	O
textile	B-Language
by	O
photography	O
or	O
any	O
other	O
digital	O
process	O
.	O
</s>
<s>
A	O
mental	O
image	B-Algorithm
exists	O
in	O
an	O
individual	O
's	O
mind	O
,	O
as	O
something	O
one	O
remembers	O
or	O
imagines	O
.	O
</s>
<s>
The	O
subject	O
of	O
an	O
image	B-Algorithm
need	O
not	O
be	O
real	O
;	O
it	O
may	O
be	O
an	O
abstract	O
concept	O
,	O
such	O
as	O
a	O
graph	B-Application
,	O
function	O
,	O
or	O
imaginary	O
entity	O
.	O
</s>
<s>
Images	O
perpetuated	O
in	O
public	O
education	O
,	O
media	O
,	O
and	O
popular	O
culture	O
have	O
a	O
profound	O
impact	O
on	O
the	O
formation	O
of	O
such	O
mental	O
images:The	O
development	O
of	O
synthetic	O
acoustic	O
technologies	O
and	O
the	O
creation	O
of	O
sound	O
art	O
have	O
led	O
to	O
a	O
consideration	O
of	O
the	O
possibilities	O
of	O
a	O
sound-image	O
made	O
up	O
of	O
irreducible	O
phonic	O
substance	O
beyond	O
linguistic	O
or	O
musicological	O
analysis	O
.	O
</s>
<s>
A	O
is	O
a	O
single	O
static	O
image	B-Algorithm
.	O
</s>
<s>
This	O
phrase	O
is	O
used	O
in	O
photography	O
,	O
visual	O
media	O
and	O
the	O
computer	B-General_Concept
industry	I-General_Concept
to	O
emphasize	O
that	O
one	O
is	O
not	O
talking	O
about	O
movies	O
,	O
or	O
in	O
very	O
precise	O
or	O
pedantic	O
technical	O
writing	O
such	O
as	O
a	O
standard	O
.	O
</s>
<s>
A	O
still	O
frame	O
is	O
a	O
still	O
image	B-Algorithm
derived	O
from	O
one	O
frame	O
of	O
a	O
moving	O
one	O
.	O
</s>
<s>
A	O
two-dimensional	O
(	O
2D	O
)	O
image	B-Algorithm
is	O
a	O
visual	O
representation	O
of	O
something	O
that	O
is	O
represented	O
using	O
only	O
two	O
spatial	O
dimensions	O
.	O
</s>
<s>
,	O
2D	O
images	O
are	O
the	O
most	O
common	O
type	O
of	O
image	B-Algorithm
.	O
</s>
<s>
In	O
image	B-Algorithm
processing	I-Algorithm
,	O
a	O
picture	B-Algorithm
function	I-Algorithm
is	O
a	O
mathematical	O
representation	O
of	O
a	O
two-dimensional	O
image	B-Algorithm
as	O
a	O
function	O
of	O
two	O
spatial	O
variables	O
.	O
</s>
<s>
The	O
function	O
f(x,y )	O
describes	O
the	O
intensity	B-Application
of	O
the	O
point	O
at	O
coordinates	O
(	O
x	O
,	O
y	O
)	O
.	O
</s>
<s>
Common	O
physical	O
forms	O
of	O
3D	O
images	O
include	O
holograms	B-Algorithm
.	O
</s>
<s>
It	O
is	O
just	O
picturing	O
an	O
image	B-Algorithm
mentally	O
,	O
also	O
called	O
imagining	O
hence	O
imagery	O
.	O
</s>
