<s>
In	O
signal	O
processing	O
,	O
the	O
term	O
multiplicative	B-Algorithm
noise	I-Algorithm
refers	O
to	O
an	O
unwanted	B-Algorithm
random	I-Algorithm
signal	I-Algorithm
that	O
gets	O
multiplied	O
into	O
some	O
relevant	O
signal	O
during	O
capture	O
,	O
transmission	O
,	O
or	O
other	O
processing	O
.	O
</s>
<s>
An	O
important	O
example	O
is	O
the	O
speckle	B-Algorithm
noise	I-Algorithm
commonly	O
observed	O
in	O
radar	B-Application
imagery	O
.	O
</s>
<s>
Examples	O
of	O
multiplicative	B-Algorithm
noise	I-Algorithm
affecting	O
digital	O
photographs	O
are	O
proper	O
shadows	O
due	O
to	O
undulations	O
on	O
the	O
surface	O
of	O
the	O
imaged	O
objects	O
,	O
shadows	O
cast	O
by	O
complex	O
objects	O
like	O
foliage	O
and	O
Venetian	O
blinds	O
,	O
dark	O
spots	O
caused	O
by	O
dust	O
in	O
the	O
lens	O
or	O
image	B-Algorithm
sensor	I-Algorithm
,	O
and	O
variations	O
in	O
the	O
gain	O
of	O
individual	O
elements	O
of	O
the	O
image	B-Algorithm
sensor	I-Algorithm
array	O
.	O
</s>
