<s>
In	O
image	B-Algorithm
processing	I-Algorithm
,	O
computer	O
graphics	O
,	O
and	O
photography	O
,	O
exposure	B-Algorithm
fusion	I-Algorithm
is	O
a	O
technique	O
for	O
blending	O
multiple	O
exposures	O
of	O
the	O
same	O
scene	O
(	O
bracketing	O
)	O
into	O
a	O
single	O
image	O
.	O
</s>
<s>
A	O
higher	O
dynamic	O
range	O
raw	O
image	O
can	O
be	O
reassembled	O
and	O
tone-mapped	B-Language
like	O
usual	O
HDR	O
images	O
,	O
or	O
more	O
commonly	O
:	O
</s>
<s>
The	O
former	O
method	O
assumes	O
a	O
linear	O
response	O
from	O
the	O
camera	O
,	O
which	O
may	O
be	O
provided	O
by	O
DNG	B-Application
or	O
other	O
raw	O
formats	O
.	O
</s>
<s>
Flexibility	O
being	O
its	O
strength	O
,	O
this	O
method	O
can	O
be	O
extended	O
to	O
perform	O
focus	B-Algorithm
stacking	I-Algorithm
by	O
using	O
contrast	O
as	O
the	O
sole	O
criteria	O
.	O
</s>
<s>
In	O
photomicrography	O
,	O
the	O
exposure	B-Algorithm
fusion	I-Algorithm
is	O
often	O
the	O
only	O
way	O
to	O
acquire	O
properly	O
exposed	O
images	O
from	O
stereomicroscopes	O
.	O
</s>
<s>
This	O
module	O
can	O
be	O
also	O
combined	O
with	O
focus	B-Algorithm
stacking	I-Algorithm
module	O
to	O
solve	O
another	O
problem	O
,	O
which	O
is	O
shallow	O
depth	O
of	O
field	O
of	O
stereomicroscopes	O
.	O
</s>
