<s>
Shadow	B-Algorithm
and	I-Algorithm
highlight	I-Algorithm
enhancement	I-Algorithm
refers	O
to	O
an	O
image	B-Algorithm
processing	I-Algorithm
technique	O
used	O
to	O
correct	O
exposure	O
.	O
</s>
<s>
It	O
is	O
,	O
however	O
,	O
considered	O
by	O
some	O
to	O
be	O
akin	O
to	O
other	O
destructive	O
Photoshop	B-Operating_System
filters	O
,	O
such	O
as	O
the	O
Watercolor	O
filter	O
,	O
or	O
the	O
Mosaic	O
filter	O
.	O
</s>
<s>
One	O
way	O
to	O
brighten	O
shadows	O
in	O
image	O
editing	O
software	O
such	O
as	O
GIMP	B-Application
or	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
is	O
to	O
duplicate	O
the	O
background	O
layer	O
,	O
invert	O
the	O
copy	O
and	O
set	O
the	O
blend	B-Algorithm
modes	I-Algorithm
of	O
that	O
top	O
layer	O
to	O
"	O
Soft	O
Light	O
"	O
.	O
</s>
<s>
Several	O
automatic	O
computer	O
image	O
processing-based	O
shadow	B-Algorithm
recovery	I-Algorithm
and	O
dynamic	O
range	O
compression	O
methods	O
can	O
yield	O
a	O
similar	O
effect	O
.	O
</s>
<s>
Shadow	B-Algorithm
enhancement	I-Algorithm
can	O
also	O
be	O
accomplished	O
using	O
adaptive	O
image	B-Algorithm
processing	I-Algorithm
algorithms	I-Algorithm
such	O
as	O
adaptive	B-Algorithm
histogram	I-Algorithm
equalization	I-Algorithm
or	O
contrast	O
limiting	O
adaptive	B-Algorithm
histogram	I-Algorithm
equalization	I-Algorithm
(	O
CLAHE	O
)	O
.	O
</s>
