<s>
In	O
computer	O
graphics	O
,	O
graphics	B-Application
software	I-Application
refers	O
to	O
a	O
program	B-Application
or	O
collection	O
of	O
programs	O
that	O
enable	O
a	O
person	O
to	O
manipulate	B-Application
images	I-Application
or	O
models	O
visually	O
on	O
a	O
computer	O
.	O
</s>
<s>
Computer	O
graphics	O
can	O
be	O
classified	O
into	O
two	O
distinct	O
categories	O
:	O
raster	B-Algorithm
graphics	I-Algorithm
and	O
vector	O
graphics	O
,	O
with	O
further	O
2D	O
and	O
3D	O
variants	O
.	O
</s>
<s>
Many	O
graphics	B-Application
programs	I-Application
focus	O
exclusively	O
on	O
either	O
vector	O
or	O
raster	B-Algorithm
graphics	I-Algorithm
,	O
but	O
there	O
are	O
a	O
few	O
that	O
operate	O
on	O
both	O
.	O
</s>
<s>
It	O
is	O
simple	O
to	O
convert	O
from	O
vector	O
graphics	O
to	O
raster	B-Algorithm
graphics	I-Algorithm
,	O
but	O
going	O
the	O
other	O
way	O
is	O
harder	O
.	O
</s>
<s>
Most	O
graphics	B-Application
programs	I-Application
have	O
the	O
ability	O
to	O
import	O
and	O
export	O
one	O
or	O
more	O
graphics	O
file	O
formats	O
,	O
including	O
those	O
formats	O
written	O
for	O
a	O
particular	O
computer	O
graphics	B-Application
program	I-Application
.	O
</s>
<s>
A	O
swatch	O
may	O
be	O
used	O
in	O
a	O
program	B-Application
or	O
be	O
part	O
of	O
the	O
universal	O
palette	O
on	O
an	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Raster	B-Algorithm
graphics	I-Algorithm
animation	O
works	O
in	O
a	O
similar	O
fashion	O
to	O
film-based	O
animation	O
,	O
where	O
a	O
series	O
of	O
still	O
images	O
produces	O
the	O
illusion	O
of	O
continuous	O
movement	O
.	O
</s>
<s>
SuperPaint	B-Application
(	O
1973	O
)	O
was	O
one	O
of	O
the	O
earliest	O
graphics	B-Application
software	I-Application
applications	O
.	O
</s>
<s>
Fauve	O
Matisse	O
(	O
later	O
Macromedia	O
xRes	O
)	O
was	O
a	O
pioneering	O
program	B-Application
of	O
the	O
early	O
1990s	O
,	O
notably	O
introducing	O
layers	B-Algorithm
in	O
customer	O
software	O
.	O
</s>
<s>
Currently	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
is	O
one	O
of	O
the	O
most	O
used	O
and	O
best-known	O
graphics	B-Application
programs	I-Application
in	O
the	O
Americas	O
,	O
having	O
created	O
more	O
custom	O
hardware	O
solutions	O
in	O
the	O
early	O
1990s	O
,	O
but	O
was	O
initially	O
subject	O
to	O
various	O
litigation	O
.	O
</s>
<s>
GIMP	B-Application
is	O
a	O
popular	O
open-source	O
alternative	O
to	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
.	O
</s>
<s>
Adobe	O
offers	O
a	O
suite	O
of	O
programs	O
called	O
Creative	B-Operating_System
Cloud	I-Operating_System
.	O
</s>
<s>
Lightroom	B-Operating_System
and	O
Photoshop	B-Operating_System
are	O
two	O
extremely	O
popular	O
editing	O
programs	O
amongst	O
photographers	O
.	O
</s>
