<s>
Image	B-Algorithm
resolution	I-Algorithm
is	O
the	O
detail	O
an	O
image	O
holds	O
.	O
</s>
<s>
The	O
term	O
applies	O
to	O
digital	B-Algorithm
images	I-Algorithm
,	O
film	O
images	O
,	O
and	O
other	O
types	O
of	O
images	O
.	O
</s>
<s>
Image	B-Algorithm
resolution	I-Algorithm
can	O
be	O
measured	O
in	O
various	O
ways	O
.	O
</s>
<s>
The	O
resolution	O
of	O
digital	B-Device
cameras	I-Device
can	O
be	O
described	O
in	O
many	O
different	O
ways	O
.	O
</s>
<s>
The	O
term	O
resolution	O
is	O
often	O
considered	O
equivalent	O
to	O
pixel	B-Algorithm
count	O
in	O
digital	O
imaging	O
,	O
though	O
international	O
standards	O
in	O
the	O
digital	B-Device
camera	I-Device
field	O
specify	O
it	O
should	O
instead	O
be	O
called	O
"	O
Number	O
of	O
Total	O
Pixels	B-Algorithm
"	O
in	O
relation	O
to	O
image	B-Algorithm
sensors	I-Algorithm
,	O
and	O
as	O
"	O
Number	O
of	O
Recorded	O
Pixels	B-Algorithm
"	O
for	O
what	O
is	O
fully	O
captured	O
.	O
</s>
<s>
Hence	O
,	O
CIPA	O
DCG-001	O
calls	O
for	O
notation	O
such	O
as	O
"	O
Number	O
of	O
Recorded	O
Pixels	B-Algorithm
1000	O
×	O
1500	O
"	O
.	O
</s>
<s>
According	O
to	O
the	O
same	O
standards	O
,	O
the	O
"	O
Number	O
of	O
Effective	O
Pixels	B-Algorithm
"	O
that	O
an	O
image	B-Algorithm
sensor	I-Algorithm
or	O
digital	B-Device
camera	I-Device
has	O
is	O
the	O
count	O
of	O
pixel	B-Algorithm
sensors	O
that	O
contribute	O
to	O
the	O
final	O
image	O
(	O
including	O
pixels	B-Algorithm
not	O
in	O
said	O
image	O
but	O
nevertheless	O
support	O
the	O
image	O
filtering	O
process	O
)	O
,	O
as	O
opposed	O
to	O
the	O
number	O
of	O
total	O
pixels	B-Algorithm
,	O
which	O
includes	O
unused	O
or	O
light-shielded	O
pixels	B-Algorithm
around	O
the	O
edges	O
.	O
</s>
<s>
An	O
image	O
of	O
N	O
pixels	B-Algorithm
height	O
by	O
M	O
pixels	B-Algorithm
wide	O
can	O
have	O
any	O
resolution	O
less	O
than	O
N	O
lines	O
per	O
picture	O
height	O
,	O
or	O
N	O
TV	O
lines	O
.	O
</s>
<s>
But	O
when	O
the	O
pixel	B-Algorithm
counts	O
are	O
referred	O
to	O
as	O
"	O
resolution	O
"	O
,	O
the	O
convention	O
is	O
to	O
describe	O
the	O
pixel	B-Algorithm
resolution	O
with	O
the	O
set	O
of	O
two	O
positive	O
integer	O
numbers	O
,	O
where	O
the	O
first	O
number	O
is	O
the	O
number	O
of	O
pixel	B-Algorithm
columns	O
(	O
width	O
)	O
and	O
the	O
second	O
is	O
the	O
number	O
of	O
pixel	B-Algorithm
rows	O
(	O
height	O
)	O
,	O
for	O
example	O
as	O
7680	O
×	O
6876	O
.	O
</s>
<s>
Another	O
popular	O
convention	O
is	O
to	O
cite	O
resolution	O
as	O
the	O
total	O
number	O
of	O
pixels	B-Algorithm
in	O
the	O
image	O
,	O
typically	O
given	O
as	O
number	O
of	O
megapixels	O
,	O
which	O
can	O
be	O
calculated	O
by	O
multiplying	O
pixel	B-Algorithm
columns	O
by	O
pixel	B-Algorithm
rows	O
and	O
dividing	O
by	O
one	O
million	O
.	O
</s>
<s>
Other	O
conventions	O
include	O
describing	O
pixels	B-Algorithm
per	O
length	O
unit	O
or	O
pixels	B-Algorithm
per	O
area	O
unit	O
,	O
such	O
as	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
or	O
per	O
square	O
inch	O
.	O
</s>
<s>
None	O
of	O
these	O
pixel	B-Algorithm
resolutions	O
are	O
true	O
resolutions	O
,	O
but	O
they	O
are	O
widely	O
referred	O
to	O
as	O
such	O
;	O
they	O
serve	O
as	O
upper	O
bounds	O
on	O
image	B-Algorithm
resolution	I-Algorithm
.	O
</s>
<s>
Below	O
is	O
an	O
illustration	O
of	O
how	O
the	O
same	O
image	O
might	O
appear	O
at	O
different	O
pixel	B-Algorithm
resolutions	O
,	O
if	O
the	O
pixels	B-Algorithm
were	O
poorly	O
rendered	O
as	O
sharp	O
squares	O
(	O
normally	O
,	O
a	O
smooth	O
image	O
reconstruction	O
from	O
pixels	B-Algorithm
would	O
be	O
preferred	O
,	O
but	O
for	O
illustration	O
of	O
pixels	B-Algorithm
,	O
the	O
sharp	O
squares	O
make	O
the	O
point	O
better	O
)	O
.	O
</s>
<s>
An	O
image	O
that	O
is	O
2048	O
pixels	B-Algorithm
in	O
width	O
and	O
1536	O
pixels	B-Algorithm
in	O
height	O
has	O
a	O
total	O
of	O
2048×1536	O
=	O
3,145,728	O
pixels	B-Algorithm
or	O
3.1	O
megapixels	O
.	O
</s>
<s>
The	O
number	O
of	O
photodiodes	O
in	O
a	O
color	O
digital	B-Device
camera	I-Device
image	B-Algorithm
sensor	I-Algorithm
is	O
often	O
a	O
multiple	O
of	O
the	O
number	O
of	O
pixels	B-Algorithm
in	O
the	O
image	O
it	O
produces	O
,	O
because	O
information	O
from	O
an	O
array	O
of	O
color	B-Algorithm
image	I-Algorithm
sensors	O
is	O
used	O
to	O
reconstruct	O
the	O
color	O
of	O
a	O
single	O
pixel	B-Algorithm
.	O
</s>
<s>
The	O
image	O
has	O
to	O
be	O
interpolated	O
or	O
demosaiced	O
to	O
produce	O
all	O
three	O
colors	O
for	O
each	O
output	O
pixel	B-Algorithm
.	O
</s>
<s>
The	O
terms	O
blurriness	O
and	O
sharpness	O
are	O
used	O
for	O
digital	B-Algorithm
images	I-Algorithm
but	O
other	O
descriptors	O
are	O
used	O
to	O
reference	O
the	O
hardware	O
capturing	O
and	O
displaying	O
the	O
images	O
.	O
</s>
<s>
The	O
measure	O
of	O
how	O
closely	O
lines	O
can	O
be	O
resolved	O
in	O
an	O
image	O
is	O
called	O
spatial	O
resolution	O
,	O
and	O
it	O
depends	O
on	O
properties	O
of	O
the	O
system	O
creating	O
the	O
image	O
,	O
not	O
just	O
the	O
pixel	B-Algorithm
resolution	O
in	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
(	O
ppi	O
)	O
.	O
</s>
<s>
For	O
practical	O
purposes	O
the	O
clarity	O
of	O
the	O
image	O
is	O
decided	O
by	O
its	O
spatial	O
resolution	O
,	O
not	O
the	O
number	O
of	O
pixels	B-Algorithm
in	O
an	O
image	O
.	O
</s>
<s>
In	O
effect	O
,	O
spatial	O
resolution	O
refers	O
to	O
the	O
number	O
of	O
independent	O
pixel	B-Algorithm
values	O
per	O
unit	O
length	O
.	O
</s>
<s>
The	O
spatial	O
resolution	O
of	O
consumer	O
displays	O
ranges	O
from	O
50	O
to	O
800	O
pixel	B-Algorithm
lines	O
per	O
inch	O
.	O
</s>
<s>
With	O
scanners	O
,	O
optical	O
resolution	O
is	O
sometimes	O
used	O
to	O
distinguish	O
spatial	O
resolution	O
from	O
the	O
number	O
of	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
.	O
</s>
<s>
In	O
remote	B-Application
sensing	I-Application
,	O
spatial	O
resolution	O
is	O
typically	O
limited	O
by	O
diffraction	O
,	O
as	O
well	O
as	O
by	O
aberrations	O
,	O
imperfect	O
focus	O
,	O
and	O
atmospheric	O
distortion	O
.	O
</s>
<s>
The	O
ground	O
sample	O
distance	O
(	O
GSD	O
)	O
of	O
an	O
image	O
,	O
the	O
pixel	B-Algorithm
spacing	O
on	O
the	O
Earth	O
's	O
surface	O
,	O
is	O
typically	O
considerably	O
smaller	O
than	O
the	O
resolvable	O
spot	O
size	O
.	O
</s>
<s>
In	O
Stereoscopic	O
3D	O
images	O
,	O
spatial	O
resolution	O
could	O
be	O
defined	O
as	O
the	O
spatial	O
information	O
recorded	O
or	O
captured	O
by	O
two	O
viewpoints	O
of	O
a	O
stereo	B-Algorithm
camera	I-Algorithm
(	O
left	O
and	O
right	O
camera	O
)	O
.	O
</s>
<s>
Pixel	B-Algorithm
encoding	O
limits	O
the	O
information	O
stored	O
in	O
a	O
digital	B-Algorithm
image	I-Algorithm
,	O
and	O
the	O
term	O
color	O
profile	O
is	O
used	O
for	O
digital	B-Algorithm
images	I-Algorithm
but	O
other	O
descriptors	O
are	O
used	O
to	O
reference	O
the	O
hardware	O
capturing	O
and	O
displaying	O
the	O
images	O
.	O
</s>
<s>
Color	B-Algorithm
images	I-Algorithm
distinguish	O
light	O
of	O
different	O
spectra	O
.	O
</s>
<s>
Multispectral	O
images	O
can	O
resolve	O
even	O
finer	O
differences	O
of	O
spectrum	O
or	O
wavelength	O
by	O
measuring	O
and	O
storing	O
more	O
than	O
the	O
traditional	O
3	O
of	O
common	O
RGB	O
color	B-Algorithm
images	I-Algorithm
.	O
</s>
<s>
Movie	B-Application
cameras	I-Application
and	O
high-speed	O
cameras	O
can	O
resolve	O
events	O
at	O
different	O
points	O
in	O
time	O
.	O
</s>
<s>
(	O
For	O
PAL	B-Language
systems	O
,	O
replace	O
480	O
with	O
576	O
.	O
)	O
</s>
<s>
Sequences	O
from	O
newer	O
films	O
are	O
scanned	O
at	O
2	O
,	O
000	O
,	O
4	O
,	O
000	O
,	O
or	O
even	O
8,000	O
columns	O
,	O
called	O
2K	O
,	O
4K	B-Architecture
,	O
and	O
8K	B-Architecture
,	O
for	O
quality	O
visual-effects	O
editing	O
on	O
computers	O
.	O
</s>
