<s>
A	O
digital	B-Algorithm
photo	I-Algorithm
frame	I-Algorithm
(	O
also	O
called	O
a	O
digital	O
media	O
frame	O
)	O
is	O
a	O
picture	O
frame	O
that	O
displays	O
digital	B-Application
photos	I-Application
without	O
the	O
need	O
of	O
a	O
computer	O
or	O
printer	O
.	O
</s>
<s>
The	O
introduction	O
of	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
predates	O
tablet	O
computers	O
,	O
which	O
can	O
serve	O
the	O
same	O
purpose	O
in	O
some	O
situations	O
;	O
however	O
,	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
are	O
generally	O
designed	O
specifically	O
for	O
the	O
stationary	O
,	O
aesthetic	O
display	O
of	O
photographs	O
and	O
therefore	O
usually	O
provide	O
a	O
nicer-looking	O
frame	O
and	O
a	O
power	O
system	O
designed	O
for	O
continuous	O
use	O
.	O
</s>
<s>
Digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
come	O
in	O
a	O
variety	O
of	O
different	O
shapes	B-Device
and	O
sizes	O
with	O
a	O
range	O
of	O
features	O
.	O
</s>
<s>
Owners	O
can	O
choose	O
a	O
digital	B-Algorithm
photo	I-Algorithm
frame	I-Algorithm
that	O
utilizes	O
a	O
WiFi	O
connection	O
or	O
not	O
,	O
comes	O
with	O
cloud	O
storage	O
,	O
and/or	O
USB	B-Protocol
and	O
SD	O
card	O
hub	O
.	O
</s>
<s>
Digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
range	O
in	O
size	O
from	O
tiny	O
keychain-sized	O
units	O
to	O
large	O
wall-mounted	O
frames	O
spanning	O
several	O
feet	O
.	O
</s>
<s>
Some	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
can	O
only	O
display	O
JPEG	O
pictures	O
.	O
</s>
<s>
Most	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
display	O
the	O
photos	O
as	O
a	O
slideshow	O
and	O
usually	O
with	O
an	O
adjustable	O
time	O
interval	O
.	O
</s>
<s>
Digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
typically	O
allow	O
the	O
display	O
of	O
pictures	O
directly	O
from	O
a	O
camera	O
's	O
memory	B-Device
card	I-Device
,	O
and	O
may	O
provide	O
internal	O
memory	O
storage	O
.	O
</s>
<s>
Some	O
allow	O
users	O
to	O
upload	O
pictures	O
to	O
the	O
frame	O
's	O
memory	O
via	O
a	O
USB	B-Protocol
connection	O
,	O
or	O
wirelessly	O
via	O
Bluetooth	B-Protocol
technology	I-Protocol
.	O
</s>
<s>
Certain	O
frames	O
provide	O
specific	O
application	O
support	O
such	O
as	O
loading	O
images	O
over	O
the	O
Internet	O
from	O
RSS	O
feeds	O
,	O
photo	B-Algorithm
sharing	I-Algorithm
sites	I-Algorithm
such	O
as	O
Flickr	B-Algorithm
,	O
Picasa	B-Application
and	O
from	O
e-mail	O
.	O
</s>
<s>
The	O
aspect	B-General_Concept
ratio	I-General_Concept
of	O
the	O
frames	O
can	O
vary	O
.	O
</s>
<s>
Common	O
aspect	B-Device
ratios	I-Device
include	O
:	O
4:3	O
,	O
3:2	O
and	O
16:9	O
.	O
</s>
<s>
(	O
Sometimes	O
16:9	O
frames	O
are	O
actually	O
15:9	O
)	O
Depending	O
on	O
the	O
model	O
and	O
features	O
,	O
images	O
which	O
do	O
not	O
exactly	O
fit	O
the	O
aspect	B-General_Concept
ratio	I-General_Concept
of	O
the	O
frame	O
may	O
be	O
cropped	O
,	O
stretched	O
,	O
or	O
shrunk	O
to	O
fit	O
.	O
</s>
<s>
This	O
can	O
be	O
avoided	O
by	O
buying	O
a	O
frame	O
with	O
an	O
aspect	B-General_Concept
ratio	I-General_Concept
that	O
exactly	O
matches	O
the	O
camera	O
,	O
or	O
editing	O
photos	O
to	O
the	O
target	O
aspect	B-General_Concept
ratio	I-General_Concept
before	O
transferring	O
them	O
to	O
the	O
frame	O
.	O
</s>
<s>
In	O
February	O
2008	O
,	O
a	O
number	O
of	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
,	O
such	O
as	O
the	O
Insignia	O
brand	O
digital	B-Algorithm
frames	I-Algorithm
manufactured	O
in	O
China	O
,	O
were	O
found	O
to	O
be	O
carrying	O
a	O
Trojan	O
horse	O
dubbed	O
Mocmex	B-Algorithm
on	O
their	O
internal	O
data	O
storage	O
.	O
</s>
<s>
Digital	B-Algorithm
photo	I-Algorithm
frame	I-Algorithm
apps	O
are	O
using	O
this	O
secure	O
login	O
protocol	O
to	O
eliminate	O
security	O
issues	O
linked	O
to	O
storing	O
login	O
credentials	O
.	O
</s>
<s>
The	O
first	O
generation	O
of	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
were	O
introduced	O
in	O
the	O
1990s	O
and	O
included	O
screens	O
with	O
the	O
ability	O
to	O
accept	O
memory	B-Device
cards	I-Device
directly	O
from	O
digital	O
cameras	O
.	O
</s>
<s>
Widespread	O
adoption	O
of	O
digital	O
cameras	O
in	O
the	O
1990s	O
left	O
consumers	O
with	O
thousands	O
of	O
digital	B-Application
photos	I-Application
without	O
a	O
viable	O
way	O
to	O
view	O
them	O
.	O
</s>
<s>
Commercially	O
available	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
started	O
to	O
appear	O
shortly	O
after	O
the	O
introduction	O
of	O
digital	B-Application
photos	I-Application
but	O
did	O
not	O
find	O
market	O
adoption	O
until	O
the	O
mid	O
2000s	O
when	O
the	O
number	O
of	O
digital	B-Application
photos	I-Application
exploded	O
with	O
the	O
integration	O
of	O
digital	O
cameras	O
into	O
cell	O
phones	O
.	O
</s>
<s>
The	O
second	O
generation	O
of	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
included	O
connectivity	O
to	O
the	O
Internet	O
.	O
</s>
<s>
In	O
1999	O
with	O
the	O
Ceiva	O
introduced	O
a	O
digital	B-Algorithm
photo	I-Algorithm
frame	I-Algorithm
with	O
dialup	O
connectivity	O
.	O
</s>
<s>
By	O
2010	O
Nixplay	O
and	O
PixStar	O
started	O
to	O
popularize	O
digital	B-Algorithm
frames	I-Algorithm
with	O
wifi	O
connections	O
,	O
allowing	O
consumers	O
to	O
upload	O
photos	O
from	O
the	O
web	O
and	O
connect	O
to	O
cloud	O
based	O
photo	B-Algorithm
sharing	I-Algorithm
and	O
storage	O
sites	O
from	O
Flickr	B-Algorithm
,	O
Picasa	B-Application
,	O
Google	O
Photos	O
,	O
Instagram	O
and	O
Facebook	O
.	O
</s>
<s>
By	O
2016	O
,	O
the	O
third	O
generation	O
of	O
digital	B-Algorithm
photo	I-Algorithm
frames	I-Algorithm
began	O
to	O
appear	O
with	O
companies	O
like	O
PhotoSpring	O
,	O
Aura	O
and	O
Joy	O
.	O
</s>
