<s>
Unimodal	B-Algorithm
thresholding	I-Algorithm
is	O
an	O
algorithm	O
for	O
automatic	B-Algorithm
image	I-Algorithm
threshold	I-Algorithm
selection	I-Algorithm
in	O
image	B-Algorithm
processing	I-Algorithm
.	O
</s>
<s>
However	O
,	O
some	O
types	O
of	O
images	O
are	O
essentially	O
unimodal	B-Algorithm
since	O
a	O
much	O
larger	O
proportion	O
of	O
just	O
one	O
class	O
of	O
pixels	O
(	O
e.g.	O
</s>
