<s>
A	O
multi-layer	B-Algorithm
CCD	I-Algorithm
is	O
a	O
CCD	B-Algorithm
image	B-Algorithm
sensor	I-Algorithm
that	O
captures	O
true	O
RGB	O
using	O
stacked	O
CCD	B-Algorithm
sensor	I-Algorithm
layers	O
.	O
</s>
<s>
This	O
concept	O
was	O
the	O
subject	O
of	O
a	O
1978	O
Kodak	O
patent	O
application	O
(	O
issued	O
1986	O
)	O
,	O
but	O
did	O
not	O
result	O
in	O
a	O
working	O
image	B-Algorithm
sensor	I-Algorithm
.	O
</s>
<s>
When	O
the	O
joke	O
was	O
released	O
in	O
2000	O
,	O
a	O
remarkably	O
similar	O
device	O
was	O
under	O
development	O
at	O
Foveon	O
—	O
the	O
Foveon	B-Algorithm
X3	I-Algorithm
image	B-Algorithm
sensor	I-Algorithm
,	O
which	O
is	O
multi-layered	O
but	O
is	O
not	O
a	O
CCD	B-Algorithm
.	O
</s>
