<s>
Pixel	B-Algorithm
binning	I-Algorithm
,	O
often	O
called	O
binning	O
,	O
is	O
the	O
process	O
of	O
combining	O
adjacent	O
pixels	B-Algorithm
throughout	O
an	O
image	O
,	O
by	O
summing	O
or	O
averaging	O
their	O
values	O
,	O
during	O
or	O
after	O
readout	O
.	O
</s>
<s>
Charge	O
from	O
adjacent	O
pixels	B-Algorithm
in	O
CCD	O
image	O
sensors	O
and	O
some	O
other	O
image	O
sensors	O
can	O
be	O
combined	O
during	O
readout	O
,	O
increasing	O
the	O
line	O
rate	O
or	O
frame	O
rate	O
.	O
</s>
<s>
In	O
the	O
context	O
of	O
image	B-Algorithm
processing	I-Algorithm
,	O
binning	O
is	O
the	O
procedure	O
of	O
combining	O
clusters	O
of	O
adjacent	O
pixels	B-Algorithm
,	O
throughout	O
an	O
image	O
,	O
into	O
single	O
pixels	B-Algorithm
.	O
</s>
<s>
For	O
example	O
,	O
in	O
2x2	O
binning	O
,	O
an	O
array	O
of	O
4	O
pixels	B-Algorithm
becomes	O
a	O
single	O
larger	O
pixel	B-Algorithm
,	O
reducing	O
the	O
number	O
of	O
pixels	B-Algorithm
to	O
1/4	O
and	O
halving	O
the	O
image	B-Algorithm
resolution	I-Algorithm
in	O
each	O
dimension	O
.	O
</s>
<s>
The	O
binned	O
image	O
has	O
lower	O
resolution	O
,	O
but	O
the	O
relative	O
noise	O
level	O
in	O
each	O
pixel	B-Algorithm
is	O
generally	O
reduced	O
.	O
</s>
