<s>
"	O
Jaggies	B-Algorithm
"	O
is	O
the	O
informal	O
name	O
for	O
artifacts	B-Algorithm
in	O
raster	B-Algorithm
images	I-Algorithm
,	O
most	O
frequently	O
from	O
aliasing	B-Error_Name
,	O
which	O
in	O
turn	O
is	O
often	O
caused	O
by	O
non-linear	O
mixing	O
effects	O
producing	O
high-frequency	O
components	O
,	O
or	O
missing	O
or	O
poor	O
anti-aliasing	O
filtering	O
prior	O
to	O
sampling	O
.	O
</s>
<s>
Jaggies	B-Algorithm
are	O
stair-like	O
lines	O
that	O
appear	O
where	O
there	O
should	O
be	O
"	O
smooth	O
"	O
straight	O
lines	O
or	O
curves	O
.	O
</s>
<s>
For	O
example	O
,	O
when	O
a	O
nominally	O
straight	O
,	O
un-aliased	O
line	O
steps	O
across	O
one	O
pixel	B-Algorithm
either	O
horizontally	O
or	O
vertically	O
,	O
a	O
"	O
dogleg	O
"	O
occurs	O
halfway	O
through	O
the	O
line	O
,	O
where	O
it	O
crosses	O
the	O
threshold	O
from	O
one	O
pixel	B-Algorithm
to	O
the	O
other	O
.	O
</s>
<s>
Jaggies	B-Algorithm
should	O
not	O
be	O
confused	O
with	O
most	O
compression	B-Algorithm
artifacts	I-Algorithm
,	O
which	O
are	O
a	O
different	O
phenomenon	O
.	O
</s>
<s>
Jaggies	B-Algorithm
occur	O
due	O
to	O
the	O
"	O
staircase	O
effect	O
"	O
.	O
</s>
<s>
This	O
is	O
because	O
a	O
line	O
represented	O
in	O
raster	O
mode	O
is	O
approximated	O
by	O
a	O
sequence	O
of	O
pixels	B-Algorithm
.	O
</s>
<s>
Jaggies	B-Algorithm
can	O
occur	O
for	O
a	O
variety	O
of	O
reasons	O
,	O
the	O
most	O
common	O
being	O
that	O
the	O
output	O
device	O
(	O
display	B-Device
monitor	I-Device
or	O
printer	O
)	O
does	O
not	O
have	O
enough	O
resolution	B-General_Concept
to	O
portray	O
a	O
smooth	O
line	O
.	O
</s>
<s>
In	O
addition	O
,	O
jaggies	B-Algorithm
often	O
occur	O
when	O
a	O
bit-mapped	O
image	O
is	O
converted	O
to	O
a	O
different	O
resolution	B-General_Concept
.	O
</s>
<s>
This	O
is	O
one	O
of	O
the	O
advantages	O
that	O
vector	O
graphics	O
have	O
over	O
bitmapped	B-Algorithm
graphics	I-Algorithm
–	O
the	O
output	O
looks	O
the	O
same	O
regardless	O
of	O
the	O
resolution	B-General_Concept
of	O
the	O
output	O
device	O
.	O
</s>
<s>
The	O
effect	O
of	O
jaggies	B-Algorithm
can	O
be	O
reduced	O
somewhat	O
by	O
a	O
graphics	O
technique	O
known	O
as	O
spatial	B-Algorithm
anti-aliasing	I-Algorithm
.	O
</s>
<s>
Anti-aliasing	O
smooths	O
out	O
jagged	O
lines	O
by	O
surrounding	O
the	O
jaggies	B-Algorithm
with	O
transparent	O
pixels	B-Algorithm
to	O
simulate	O
the	O
appearance	O
of	O
fractionally-filled	O
pixels	B-Algorithm
.	O
</s>
<s>
The	O
downside	O
of	O
anti-aliasing	O
is	O
that	O
it	O
reduces	O
contrast	O
–	O
rather	O
than	O
sharp	O
black/white	O
transitions	O
,	O
there	O
are	O
shades	O
of	O
gray	O
–	O
and	O
the	O
resulting	O
image	O
is	O
fuzzy	O
.	O
</s>
<s>
This	O
is	O
an	O
inescapable	O
trade-off	O
:	O
if	O
the	O
resolution	B-General_Concept
is	O
insufficient	O
to	O
display	O
the	O
desired	O
detail	O
,	O
the	O
output	O
will	O
either	O
be	O
jagged	O
or	O
fuzzy	O
,	O
or	O
some	O
combination	O
thereof	O
.	O
</s>
<s>
In	O
addition	O
,	O
jaggies	B-Algorithm
often	O
occur	O
when	O
a	O
bit	O
mapped	O
image	O
is	O
converted	O
to	O
a	O
different	O
resolution	B-General_Concept
.	O
</s>
<s>
They	O
can	O
occur	O
for	O
variety	O
of	O
reasons	O
,	O
the	O
most	O
common	O
being	O
that	O
the	O
output	O
device	O
(	O
display	B-Device
monitor	I-Device
or	O
printer	O
)	O
does	O
not	O
have	O
enough	O
resolution	B-General_Concept
to	O
portray	O
a	O
smooth	O
line	O
.	O
</s>
<s>
In	O
real-time	O
computer	O
graphics	O
,	O
especially	O
gaming	O
,	O
anti-aliasing	O
is	O
used	O
to	O
remove	O
jaggies	B-Algorithm
created	O
by	O
the	O
edges	O
of	O
polygons	O
and	O
other	O
lines	O
entirely	O
.	O
</s>
<s>
Some	O
video	O
game	O
developers	O
do	O
not	O
enable	O
anti-aliasing	O
by	O
default	O
for	O
their	O
games	O
because	O
the	O
intended	O
hardware	O
is	O
not	O
powerful	O
enough	O
to	O
run	O
it	O
at	O
smooth	O
frames	O
per	O
second	O
if	O
anti-aliasing	O
is	O
enabled	O
.	O
</s>
<s>
On	O
eighth-generation	B-Application
video	B-Application
game	I-Application
consoles	I-Application
,	O
such	O
as	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
,	O
anti-aliasing	O
and	O
frame	O
rate	O
has	O
been	O
heavily	O
improved	O
.	O
</s>
<s>
Jaggies	B-Algorithm
in	O
bitmaps	O
,	O
such	O
as	O
sprites	O
and	O
surface	O
materials	O
,	O
are	O
most	O
often	O
dealt	O
with	O
by	O
separate	O
texture	O
filtering	O
routines	O
,	O
which	O
are	O
far	O
easier	O
to	O
perform	O
than	O
anti-aliasing	O
filtering	O
.	O
</s>
<s>
In	O
the	O
Atari	B-Device
8-bit	I-Device
game	O
Rescue	O
on	O
Fractalus	O
!,	O
developed	O
by	O
Lucasfilm	O
Games	O
and	O
published	O
in	O
1985	O
,	O
the	O
graphics	O
depicting	O
the	O
cockpit	O
of	O
the	O
player	O
's	O
spacecraft	O
contains	O
two	O
window	O
struts	O
,	O
which	O
are	O
not	O
anti-aliased	O
and	O
are	O
therefore	O
very	O
"	O
jagged	O
"	O
.	O
</s>
<s>
The	O
developers	O
made	O
fun	O
of	O
this	O
and	O
named	O
the	O
in-game	O
enemies	O
"	O
Jaggi	O
"	O
,	O
and	O
also	O
initially	O
titled	O
the	O
game	O
Behind	B-Application
Jaggi	I-Application
Lines	I-Application
!	I-Application
.	O
</s>
