<s>
The	O
Lucy	B-Algorithm
–	I-Algorithm
Hook	I-Algorithm
coaddition	I-Algorithm
method	I-Algorithm
is	O
an	O
image	O
processing	O
technique	O
for	O
combining	O
sub-stepped	O
astronomical	O
image	O
data	O
onto	O
a	O
finer	O
grid	O
.	O
</s>
<s>
Tests	O
with	O
very	O
deep	O
Hubble	O
Space	O
Telescope	O
Wide	B-Algorithm
Field	I-Algorithm
and	I-Algorithm
Planetary	I-Algorithm
Camera	I-Algorithm
2	I-Algorithm
(	O
WFPC2	B-Algorithm
)	O
imaging	O
data	O
of	O
excellent	O
quality	O
show	O
that	O
these	O
methods	O
can	O
be	O
very	O
effective	O
and	O
allow	O
fine-scale	O
features	O
to	O
be	O
studied	O
better	O
than	O
on	O
the	O
unprocessed	O
images	O
.	O
</s>
<s>
The	O
Lucy	B-Algorithm
–	I-Algorithm
Hook	I-Algorithm
coaddition	I-Algorithm
method	I-Algorithm
is	O
an	O
extension	O
of	O
the	O
standard	O
Richardson	B-Algorithm
–	I-Algorithm
Lucy	I-Algorithm
deconvolution	I-Algorithm
iterative	O
restoration	O
method	O
.	O
</s>
