<s>
gPhoto	B-Algorithm
is	O
a	O
set	O
of	O
software	B-Application
applications	I-Application
and	O
libraries	B-Library
for	O
use	O
in	O
digital	B-Application
photography	I-Application
.	O
</s>
<s>
gPhoto	B-Algorithm
supports	O
not	O
just	O
retrieving	O
of	O
images	O
from	O
camera	O
devices	O
,	O
but	O
also	O
upload	O
and	O
remote	O
controlled	O
configuration	O
and	O
capture	O
,	O
depending	O
on	O
whether	O
the	O
camera	O
supports	O
those	O
features	O
.	O
</s>
<s>
Released	O
under	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
,	O
gPhoto	B-Algorithm
is	O
free	B-Application
software	I-Application
.	O
</s>
<s>
gPhoto	B-Algorithm
supports	O
more	O
than	O
2500	O
cameras	O
as	O
of	O
June	O
2019	O
.	O
</s>
<s>
It	O
is	O
cross-platform	B-Operating_System
,	O
running	O
under	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
and	O
other	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
gPhoto	B-Algorithm
has	O
support	O
for	O
the	O
Picture	B-Algorithm
Transfer	I-Algorithm
Protocol	I-Algorithm
(	O
PTP	O
)	O
and	O
will	O
also	O
connect	O
to	O
devices	O
that	O
use	O
the	O
Media	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
MTP	O
)	O
.	O
</s>
<s>
Many	O
cameras	O
are	O
not	O
supported	O
by	O
gPhoto	B-Algorithm
,	O
but	O
have	O
support	O
for	O
the	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
device	I-Architecture
class	I-Architecture
,	O
which	O
is	O
well-supported	O
under	O
Linux	B-Application
.	O
</s>
<s>
gPhoto	B-Algorithm
supports	O
camera	O
tethering	O
control	O
,	O
preview	O
,	O
viewfinder	O
in	O
PTP	O
or	O
camera	O
specific	O
protocols	O
on	O
numerous	O
cameras	O
.	O
</s>
<s>
gPhoto	B-Algorithm
provides	O
a	O
library	O
,	O
libgphoto2	O
,	O
to	O
allow	O
for	O
other	O
frontends	O
to	O
be	O
written	O
for	O
it	O
,	O
and	O
a	O
command-line	B-Application
interface	I-Application
.	O
</s>
<s>
gtkam	O
is	O
the	O
official	O
GUI	B-Application
client	O
for	O
gPhoto	B-Algorithm
.	O
</s>
<s>
Other	O
clients	O
are	O
the	O
KDE	B-Application
program	O
digiKam	B-Language
and	O
the	O
GNOME	B-Application
program	O
Shotwell	B-Language
.	O
</s>
<s>
GVfs	B-Language
uses	O
libgphoto2	O
to	O
expose	O
on-camera	O
photos	O
to	O
GNOME	B-Application
applications	O
via	O
a	O
virtual	O
filesystem	O
.	O
</s>
<s>
DigiKam	B-Language
,	O
gtkam	O
and	O
support	O
tethering	O
capture	O
and	O
viewfinder	O
for	O
supported	O
cameras	O
.	O
</s>
