<s>
Siril	B-Language
is	O
a	O
software	B-Application
application	I-Application
for	O
astrophotography	O
,	O
which	O
allows	O
pre-processing	O
and	O
processing	O
of	O
images	O
from	O
any	O
type	O
of	O
camera	O
(	O
CCD	O
,	O
planetary	O
camera	O
,	O
webcam	O
etc	O
.	O
)	O
.	O
</s>
<s>
The	O
images	O
must	O
be	O
converted	O
to	O
32-bit	O
FITS	O
format	O
which	O
is	O
the	O
format	O
used	O
natively	O
by	O
Siril	B-Language
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
GNOME	B-Application
environment	O
and	O
therefore	O
can	O
be	O
run	O
on	O
many	O
systems	O
like	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
MacOS	B-Application
,	O
and	O
Windows	O
.	O
</s>
<s>
It	O
is	O
free	B-Application
software	I-Application
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
GPL	I-License
.	O
</s>
<s>
Siril	B-Language
was	O
initially	O
developed	O
as	O
a	O
clone	O
of	O
Christian	O
Buil	O
's	O
IRIS	O
software	O
,	O
in	O
order	O
to	O
overcome	O
the	O
lack	O
of	O
astronomical	O
image	O
processing	O
software	O
under	O
the	O
Linux	B-Application
system	O
;	O
hence	O
the	O
name	O
SIRI-L	O
(	O
IRIS	O
for	O
Linux	B-Application
)	O
.	O
</s>
<s>
Siril	B-Language
allows	O
the	O
conversion	O
of	O
a	O
large	O
number	O
of	O
formats	O
(	O
images	O
or	O
videos	O
)	O
to	O
FITS	O
.	O
</s>
<s>
Since	O
version	O
0.9.7	O
,	O
the	O
global	O
alignment	O
which	O
uses	O
a	O
recognized	O
algorithm	O
for	O
this	O
task	O
has	O
been	O
added	O
an	O
optimization	O
method	O
thanks	O
to	O
the	O
OpenCV	B-Language
library	O
.	O
</s>
<s>
In	O
fact	O
,	O
Siril	B-Language
's	O
automatic	O
alignment	O
allows	O
to	O
align	O
images	O
obtained	O
with	O
instruments	O
of	O
different	O
focal	O
lengths	O
.	O
</s>
<s>
Siril	B-Language
has	O
a	O
photometric	O
analysis	O
tool	O
.	O
</s>
<s>
This	O
tool	O
requires	O
the	O
installation	O
of	O
gnuplot	B-Application
.	O
</s>
<s>
Since	O
version	O
0.9.9	O
,	O
the	O
ability	O
to	O
create	O
scripts	O
has	O
been	O
integrated	O
into	O
Siril	B-Language
.	O
</s>
<s>
Since	O
version	O
0.9.9	O
,	O
it	O
is	O
also	O
possible	O
to	O
launch	O
Siril	B-Language
through	O
the	O
console	O
and	O
run	O
a	O
script	O
without	O
the	O
GUI	O
.	O
</s>
<s>
Currently	O
,	O
Siril	B-Language
works	O
internally	O
with	O
32-bit	O
FITS	O
floating	O
point	O
images	O
.	O
</s>
