<s>
Darktable	B-Language
(	O
stylized	O
as	O
darktable	B-Language
)	O
is	O
a	O
free	B-License
and	I-License
open-source	I-License
photography	O
application	B-Application
program	I-Application
and	O
raw	B-Application
developer	O
.	O
</s>
<s>
Rather	O
than	O
being	O
a	O
raster	B-Application
graphics	I-Application
editor	I-Application
like	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
or	O
GIMP	B-Application
,	O
it	O
comprises	O
a	O
subset	O
of	O
image	B-Application
editing	I-Application
operations	O
specifically	O
aimed	O
at	O
non-destructive	O
raw	B-Application
image	I-Application
post-production	O
.	O
</s>
<s>
It	O
is	O
freely	O
available	O
in	O
versions	O
tailored	O
for	O
most	O
major	O
Linux	B-Application
distributions	I-Application
,	O
macOS	B-Application
,	O
Solaris	B-Application
and	O
Windows	B-Application
and	O
is	O
released	O
under	O
the	O
GPL-3.0-or-later	B-License
.	O
</s>
<s>
Darktable	B-Language
involves	O
the	O
concept	O
of	O
non-destructive	O
editing	O
,	O
similar	O
to	O
that	O
of	O
some	O
other	O
raw	B-Application
manipulation	O
software	O
.	O
</s>
<s>
An	O
integrated	O
mover	O
for	O
executing	O
Lua	B-Language
scripts	I-Language
.	O
</s>
<s>
Support	O
for	O
drawn	O
masks	O
was	O
added	O
in	O
Darktable	B-Language
version	O
1.4	O
,	O
allowing	O
application	O
of	O
effects	O
to	O
manually	O
specified	O
areas	O
of	O
an	O
image	O
.	O
</s>
<s>
Darktable	B-Language
has	O
built-in	O
ICC	O
profile	O
support	O
for	O
sRGB	O
,	O
Adobe	O
RGB	O
,	O
XYZ	O
and	O
linear	O
RGB	O
color	O
spaces	O
.	O
</s>
<s>
Raw	B-Application
image	I-Application
formats	I-Application
,	O
JPEG	O
,	O
HDR	O
and	O
PFM	O
images	O
can	O
be	O
imported	O
from	O
disk	O
or	O
camera	O
,	O
and	O
exported	O
to	O
disk	O
,	O
Picasa	B-Algorithm
Web	I-Algorithm
Albums	I-Algorithm
,	O
Flickr	B-Algorithm
,	O
email	O
,	O
and	O
to	O
a	O
simple	O
HTML-based	O
web	O
gallery	O
as	O
JPEG	O
,	O
PNG	O
,	O
TIFF	O
,	O
WebP	O
,	O
PPM	O
,	O
PFM	O
and	O
EXR	B-Application
images	O
.	O
</s>
<s>
Darktable	B-Language
can	O
be	O
controlled	O
by	O
scripts	O
written	O
in	O
Lua	B-Language
version	O
5.2	O
.	O
</s>
<s>
Lua	B-Language
can	O
be	O
used	O
to	O
define	O
actions	O
which	O
Darktable	B-Language
should	O
perform	O
whenever	O
a	O
specified	O
event	O
is	O
triggered	O
.	O
</s>
<s>
One	O
example	O
might	O
be	O
calling	O
an	O
external	O
application	O
during	O
file	O
export	O
in	O
order	O
to	O
apply	O
additional	O
processing	O
steps	O
outside	O
of	O
Darktable	B-Language
.	O
</s>
<s>
Darktable	B-Language
has	O
two	O
main	O
modes	O
:	O
lighttable	O
and	O
darkroom	O
.	O
</s>
<s>
Rating	O
and	O
categorizing	O
buttons	O
are	O
at	O
the	O
top	O
,	O
while	O
the	O
right-side	O
panel	O
features	O
various	O
modules	B-Architecture
such	O
as	O
a	O
metadata	O
editor	O
and	O
a	O
tag	O
editor	O
.	O
</s>
<s>
A	O
module	B-Architecture
used	O
to	O
export	O
images	O
is	O
located	O
at	O
the	O
bottom-right	O
.	O
</s>
<s>
Darktable	B-Language
's	O
configuration	O
allows	O
custom	O
keyboard	O
shortcuts	O
and	O
personalized	O
defaults	O
.	O
</s>
<s>
The	O
third	O
mode	O
allows	O
tethering	O
through	O
gPhoto	B-Algorithm
to	O
some	O
of	O
the	O
cameras	O
which	O
support	O
it	O
.	O
</s>
<s>
darktable	B-Language
includes	O
67	O
image	O
adjustment	O
plugins	O
,	O
which	O
it	O
divides	O
into	O
5	O
groups	O
;	O
</s>
<s>
Plugins	O
for	O
simple	O
well-known	O
photo	O
adjustment	O
operations	O
include	O
:	O
contrast	O
brightness	O
saturation	O
module	B-Architecture
;	O
shadows	O
and	O
highlights	O
;	O
color	O
reconstruction	O
;	O
base	O
curve	O
with	O
presets	O
to	O
automatically	O
improve	O
contrast	O
and	O
colors	O
;	O
crop	O
and	O
rotate	O
;	O
orientation	O
;	O
exposure	O
;	O
demosaic	B-Algorithm
;	O
highlight	O
reconstruction	O
;	O
white	B-Algorithm
balance	I-Algorithm
;	O
invert	O
and	O
raw	B-Application
black/white	O
point	O
.	O
</s>
<s>
Plugins	O
related	O
to	O
contrast	O
and	O
lighting	O
include	O
:	O
fill	O
light	O
for	O
modifying	O
the	O
exposure	O
based	O
on	O
pixel	O
lightness	O
;	O
levels	O
to	O
set	O
black	O
;	O
tone	O
curve	O
;	O
zone	O
system	O
;	O
filmic	O
;	O
local	O
contrast	O
;	O
global	O
tone	B-Language
mapping	I-Language
and	O
tone	B-Language
mapping	I-Language
.	O
</s>
<s>
Plugins	O
related	O
to	O
hue	O
and	O
saturation	O
include	O
:	O
velvia	O
,	O
which	O
mimics	O
Velvia	O
film	O
colors	O
by	O
increasing	O
saturation	O
on	O
lower	O
saturated	O
pixels	O
more	O
than	O
on	O
highly	O
saturated	O
pixels	O
;	O
channel	O
mixer	O
;	O
output	O
color	O
profile	O
;	O
color	O
contrast	O
;	O
color	O
correction	O
,	O
to	O
modify	O
the	O
global	O
saturation	O
or	O
to	O
give	O
a	O
tint	O
;	O
monochrome	O
;	O
color	O
zones	O
;	O
color	B-Algorithm
balance	I-Algorithm
;	O
vibrance	O
;	O
color	O
look	O
up	O
table	O
;	O
input	O
color	O
profile	O
and	O
unbreak	O
input	O
color	O
profile	O
.	O
</s>
<s>
Plugins	O
for	O
repairing	O
visual	O
imperfections	O
include	O
:	O
dithering	O
;	O
sharpen	O
;	O
equalizer	O
;	O
denoise	O
(	O
non-local	O
means	O
)	O
;	O
defringe	O
;	O
haze	O
removal	O
;	O
denoise	O
(	O
bilateral	O
filter	O
)	O
;	O
scale	O
pixel	O
;	O
rotate	O
pixels	O
;	O
liquify	O
;	O
perspective	O
correction	O
;	O
lens	O
correction	O
using	O
the	O
LensFun	O
library	O
;	O
retouch	O
;	O
spot	O
removal	O
;	O
denoise	O
(	O
profiled	O
)	O
;	O
raw	B-Application
denoise	O
;	O
hot	B-General_Concept
pixels	I-General_Concept
and	O
chromatic	O
aberrations	O
.	O
</s>
<s>
Artistic	O
postprocessing	O
plugins	O
used	O
for	O
visual	O
effects	O
include	O
:	O
watermark	B-General_Concept
;	O
framing	O
;	O
split-toning	O
;	O
vignetting	O
;	O
soften	O
;	O
grain	O
;	O
highpass	O
;	O
lowpass	O
;	O
lowlight	O
vision	O
;	O
bloom	O
;	O
color	O
mapping	O
;	O
colorize	O
and	O
graduated	O
density	O
.	O
</s>
<s>
In	O
2011	O
,	O
the	O
Darktable	B-Language
team	O
participated	O
in	O
the	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
(	O
GSoC	B-Application
)	O
.	O
</s>
<s>
The	O
main	O
goals	O
were	O
to	O
remove	O
libglade	B-Language
dependency	O
from	O
Darktable	B-Language
and	O
to	O
make	O
room	O
for	O
more	O
modularity	B-Architecture
.	O
</s>
<s>
Darktable	B-Language
is	O
released	O
under	O
the	O
GPL-3.0-or-later	B-License
as	O
free	B-Application
software	I-Application
.	O
</s>
<s>
The	O
current	O
version	O
of	O
Darktable	B-Language
works	O
on	O
Linux	B-Application
,	O
macOS	B-Application
and	O
Windows	B-Application
.	O
</s>
<s>
Many	O
Linux	B-Application
distributions	I-Application
include	O
Darktable	B-Language
in	O
their	O
default	O
repositories	O
,	O
including	O
Debian	O
,	O
Fedora	O
,	O
openSUSE	B-Operating_System
,	O
Arch	O
Linux	B-Application
,	O
and	O
Gentoo	B-Application
Linux	I-Application
.	O
</s>
<s>
Darktable	B-Language
also	O
runs	O
on	O
Solaris	B-Application
11	I-Application
,	O
with	O
packages	O
in	O
IPS	B-Application
format	O
available	O
from	O
the	O
maintainer	O
.	O
</s>
