<s>
The	O
Pulfrich	B-Algorithm
effect	I-Algorithm
is	O
a	O
psychophysical	O
percept	B-General_Concept
wherein	O
lateral	O
motion	O
of	O
an	O
object	O
in	O
the	O
field	O
of	O
view	O
is	O
interpreted	O
by	O
the	O
visual	O
cortex	O
as	O
having	O
a	O
depth	O
component	O
,	O
due	O
to	O
a	O
relative	O
difference	O
in	O
signal	O
timings	O
between	O
the	O
two	O
eyes	O
.	O
</s>
<s>
In	O
the	O
classic	O
Pulfrich	B-Algorithm
effect	I-Algorithm
experiment	O
,	O
a	O
subject	O
views	O
a	O
pendulum	O
swinging	O
in	O
a	O
plane	O
perpendicular	O
to	O
the	O
observer	O
's	O
line	O
of	O
sight	O
.	O
</s>
<s>
The	O
Pulfrich	B-Algorithm
effect	I-Algorithm
has	O
typically	O
been	O
measured	O
under	O
full	O
field	O
conditions	O
with	O
dark	O
targets	O
on	O
a	O
bright	O
background	O
,	O
and	O
yields	O
about	O
a	O
15	O
ms	O
delay	O
for	O
a	O
factor	O
of	O
ten	O
difference	O
in	O
average	O
retinal	O
illuminance	O
.	O
</s>
<s>
The	O
Pulfrich	B-Algorithm
effect	I-Algorithm
has	O
been	O
utilized	O
to	O
enable	O
a	O
type	O
of	O
stereoscopy	B-Algorithm
,	O
or	O
3-D	O
visual	O
effect	O
,	O
in	O
visual	O
media	O
such	O
as	O
film	O
and	O
TV	O
.	O
</s>
<s>
As	O
in	O
other	O
kinds	O
of	O
stereoscopy	B-Algorithm
,	O
glasses	O
are	O
used	O
to	O
create	O
the	O
illusion	O
of	O
a	O
three-dimensional	O
image	O
.	O
</s>
<s>
Because	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
depends	O
on	O
motion	O
in	O
a	O
particular	O
direction	O
to	O
instigate	O
the	O
illusion	O
of	O
depth	O
,	O
it	O
is	O
not	O
useful	O
as	O
a	O
general	O
stereoscopic	B-Algorithm
technique	O
.	O
</s>
<s>
When	O
the	O
only	O
movement	O
is	O
lateral	O
movement	O
of	O
the	O
camera	O
then	O
the	O
effect	O
is	O
as	O
real	O
as	O
any	O
other	O
form	O
of	O
stereoscopy	B-Algorithm
,	O
but	O
this	O
seldom	O
happens	O
except	O
in	O
highly	O
contrived	O
situations	O
.	O
</s>
<s>
One	O
advantage	O
of	O
material	O
produced	O
to	O
take	O
advantage	O
of	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
is	O
that	O
it	O
is	O
fully	O
backward-compatible	O
with	O
"	O
regular	O
"	O
viewing	O
;	O
unlike	O
stereoscopic	B-Algorithm
(	O
two-image	O
)	O
video	O
,	O
a	O
3D	O
Pulfrich	B-Algorithm
effect	I-Algorithm
only	O
has	O
one	O
image	O
and	O
as	O
a	O
result	O
does	O
not	O
produce	O
the	O
ghosting	O
effect	O
for	O
those	O
not	O
wearing	O
glasses	O
or	O
the	O
color	O
distortion	O
of	O
technologies	O
such	O
as	O
anaglyph	O
.	O
</s>
<s>
The	O
Pulfrich	B-Algorithm
effect	I-Algorithm
can	O
also	O
be	O
achieved	O
by	O
wearing	O
a	O
sunglass	O
lens	O
over	O
one	O
eye	O
,	O
and	O
since	O
sunglasses	O
are	O
very	O
common	O
,	O
the	O
need	O
to	O
distribute	O
"	O
special	O
"	O
3D	O
glasses	O
is	O
reduced	O
.	O
</s>
<s>
These	O
colors	O
complemented	O
each	O
other	O
to	O
produce	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
while	O
avoiding	O
distortion	O
in	O
the	O
broadcast	O
's	O
natural	O
colors	O
.	O
</s>
<s>
The	O
commercial	O
was	O
said	O
to	O
be	O
created	O
using	O
Nuoptix	O
3D	B-Algorithm
technology	I-Algorithm
to	O
create	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
.	O
</s>
<s>
A	O
Power	B-Application
Rangers	I-Application
Lightspeed	I-Application
Rescue	I-Application
movie	O
called	O
Power	O
Rangers	O
in	O
3D	O
:	O
Triple	O
Force	O
(	O
later	O
broadcast	O
as	O
two-part	O
Trakeena	O
's	O
Revenge	O
)	O
sold	O
on	O
VHS	O
through	O
McDonald	O
's	O
purportedly	O
used	O
"	O
Circlescan	O
4D	O
"	O
technology	O
,	O
which	O
is	O
based	O
on	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
,	O
but	O
there	O
was	O
very	O
little	O
3D	O
present	O
.	O
</s>
<s>
Animated	O
programs	O
that	O
employed	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
in	O
specific	O
segments	O
of	O
its	O
programs	O
include	O
Yo	O
Yogi	O
!,	O
The	O
Bots	O
Master	O
,	O
and	O
Space	O
Strikers	O
;	O
they	O
typically	O
achieved	O
the	O
effect	O
through	O
the	O
use	O
of	O
constantly	O
moving	O
background	O
and	O
foreground	O
layers	O
.	O
</s>
<s>
Episodes	O
are	O
widely	O
available	O
on	O
the	O
internet	O
,	O
but	O
only	O
a	O
few	O
use	O
the	O
Pulfrich	B-Algorithm
effect	I-Algorithm
.	O
</s>
<s>
So	O
did	O
Jim	B-Application
Power	I-Application
:	I-Application
The	I-Application
Lost	I-Application
Dimension	I-Application
in	I-Application
3-D	I-Application
for	O
the	O
Super	B-Application
NES	I-Application
,	O
using	O
constantly	O
scrolling	O
backgrounds	O
to	O
cause	O
the	O
effect	O
.	O
</s>
<s>
There	O
were	O
only	O
2	O
2D	O
compatible	O
technologies	O
which	O
use	O
clear	O
lenses	O
,	O
ChromaDepth	B-Algorithm
and	O
Pulfrich	O
.	O
</s>
<s>
Since	O
ChromaDepth	B-Algorithm
would	O
make	O
Mario	O
(	O
a	O
red-and-blue	O
colored	O
character	O
)	O
look	O
odd	O
,	O
and	O
most	O
walking	O
scenes	O
were	O
filmed	O
with	O
Mario	O
in	O
the	O
foreground	O
slightly	O
left	O
of	O
center	O
,	O
the	O
left	O
having	O
the	O
perpendicular	O
to	O
the	O
long	O
horizon	O
,	O
and	O
the	O
right	O
line	O
of	O
sight	O
extending	O
into	O
the	O
horizon	O
,	O
Pulfrich	O
glasses	O
were	O
assumed	O
to	O
be	O
the	O
type	O
included	O
in	O
the	O
Toys	O
R	O
Us	O
pack	O
.	O
</s>
