<s>
Photosynth	B-Application
is	O
a	O
discontinued	O
app	O
and	O
service	O
from	O
Microsoft	O
Live	O
Labs	O
and	O
the	O
University	O
of	O
Washington	O
that	O
analyzes	O
digital	B-Application
photographs	I-Application
and	O
generates	B-Algorithm
a	I-Algorithm
three-dimensional	I-Algorithm
model	I-Algorithm
of	O
the	O
photos	O
and	O
a	O
point	B-Algorithm
cloud	I-Algorithm
of	O
a	O
photographed	O
object	O
.	O
</s>
<s>
Users	O
are	O
able	O
to	O
view	O
and	O
generate	O
their	O
own	O
models	O
using	O
a	O
software	O
tool	O
available	O
for	O
download	O
at	O
the	O
Photosynth	B-Application
website	O
.	O
</s>
<s>
Photosynth	B-Application
is	O
based	O
on	O
Photo	O
Tourism	O
,	O
a	O
research	O
project	O
by	O
University	O
of	O
Washington	O
graduate	O
student	O
Noah	O
Snavely	O
.	O
</s>
<s>
Shortly	O
after	O
Microsoft	O
's	O
acquisition	O
of	O
Seadragon	B-Operating_System
in	O
early	O
2006	O
,	O
that	O
team	O
began	O
work	O
on	O
Photosynth	B-Application
,	O
under	O
the	O
direction	O
of	O
Seadragon	B-Operating_System
founder	O
Blaise	O
Agüera	O
y	O
Arcas	O
.	O
</s>
<s>
Microsoft	O
teamed	O
up	O
with	O
NASA	O
on	O
August	O
6	O
,	O
2007	O
allowing	O
users	O
to	O
preview	O
its	O
Photosynth	B-Application
technology	O
showing	O
the	O
Space	O
Shuttle	O
Endeavour	O
.	O
</s>
<s>
On	O
August	O
20	O
,	O
2008	O
,	O
Microsoft	O
officially	O
released	O
Photosynth	B-Application
to	O
the	O
public	O
,	O
allowing	O
users	O
to	O
upload	O
their	O
images	O
and	O
generate	O
their	O
own	O
Photosynth	B-Application
models	O
.	O
</s>
<s>
In	O
March	O
2010	O
,	O
Photosynth	B-Application
added	O
support	O
for	O
gigapixel	B-Algorithm
panoramas	B-Application
stitched	O
in	O
Microsoft	B-Application
ICE	I-Application
.	O
</s>
<s>
The	O
panoramas	B-Application
use	O
Seadragon	B-Operating_System
based	O
technology	O
similar	O
to	O
the	O
system	O
already	O
used	O
in	O
synths	O
.	O
</s>
<s>
In	O
July	O
2015	O
,	O
Microsoft	O
announced	O
it	O
would	O
be	O
retiring	O
the	O
Photosynth	B-Application
mobile	O
apps	O
.	O
</s>
<s>
As	O
Photosynth	B-Application
prepared	O
to	O
shut	O
down	O
in	O
early	O
2017	O
,	O
Mapillary	B-Application
,	O
a	O
crowdsourced	O
street-level	O
imaging	O
platform	O
,	O
reached	O
out	O
to	O
the	O
Photosynth	B-Application
community	O
with	O
their	O
Photosynth-to-Mapillary	O
blog	O
post	O
,	O
and	O
the	O
official	O
Photosynth	B-Application
Twitter	O
account	O
suggested	O
users	O
"	O
check	O
them	O
out	O
"	O
.	O
</s>
<s>
On	O
6	O
February	O
2017	O
,	O
Microsoft	O
decommissioned	O
the	O
Photosynth	B-Application
website	O
and	O
services	O
.	O
</s>
<s>
On	O
20	O
December	O
2017	O
,	O
Photosynth	B-Application
returned	O
as	O
a	O
feature	O
of	O
the	O
Microsoft	B-Algorithm
Pix	I-Algorithm
app	O
.	O
</s>
<s>
In	O
the	O
development	O
of	O
Microsoft	B-Application
Flight	I-Application
Simulator	I-Application
,	O
Microsoft	O
's	O
Photosynth	B-Application
technology	O
returned	O
to	O
recreate	O
buildings	O
and	O
terrain	O
across	O
the	O
entire	O
world	O
.	O
</s>
<s>
The	O
Photosynth	B-Application
technology	O
works	O
in	O
two	O
steps	O
.	O
</s>
<s>
Each	O
photograph	O
is	O
processed	O
using	O
an	O
interest	O
point	O
detection	O
and	O
matching	O
algorithm	O
developed	O
by	O
Microsoft	O
Research	O
which	O
is	O
similar	O
in	O
function	O
to	O
UBC	O
's	O
Scale-invariant	B-Algorithm
feature	I-Algorithm
transform	I-Algorithm
.	O
</s>
<s>
This	O
process	O
is	O
known	O
scientifically	O
as	O
bundle	B-General_Concept
adjustment	I-General_Concept
and	O
is	O
commonly	O
used	O
in	O
the	O
field	O
of	O
photogrammetry	B-Application
,	O
with	O
similar	O
products	O
available	O
such	O
as	O
Imodeller	O
and	O
D-Sculptor	O
.	O
</s>
<s>
The	O
second	O
step	O
involves	O
the	O
display	O
of	O
and	O
navigation	O
through	O
the	O
3D	O
point	B-Algorithm
cloud	I-Algorithm
of	O
features	O
identified	O
in	O
the	O
first	O
step	O
.	O
</s>
<s>
This	O
is	O
done	O
with	O
the	O
publicly	O
downloadable	O
Photosynth	B-Application
viewer	O
.	O
</s>
<s>
It	O
incorporates	O
DeepZoom	B-Operating_System
technology	O
Microsoft	O
obtained	O
through	O
its	O
acquisition	O
of	O
Seadragon	B-Operating_System
in	O
January	O
2006	O
.	O
</s>
<s>
The	O
Seadragon	B-Operating_System
technology	O
enables	O
smooth	O
zooming	O
into	O
the	O
high-resolution	O
photographs	O
without	O
downloading	O
them	O
to	O
the	O
user	O
's	O
machine	O
.	O
</s>
<s>
The	O
Photosynth	B-Application
Direct	O
3D-based	O
viewing	O
software	O
is	O
only	O
available	O
to	O
the	O
Windows	B-Device
7	I-Device
,	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Application
XP	I-Application
operating	I-Application
systems	I-Application
.	O
</s>
<s>
However	O
,	O
the	O
team	O
released	O
a	O
Silverlight	B-Application
version	O
of	O
the	O
viewer	O
which	O
has	O
succeeded	O
the	O
D3D	O
viewer	O
as	O
the	O
main	O
option	O
to	O
view	O
photosynths	B-Application
.	O
</s>
<s>
As	O
of	O
March	O
2009	O
,	O
user	O
uploaded	O
Photosynth	B-Application
collections	O
were	O
available	O
for	O
viewing	O
on	O
iPhones	B-Device
using	O
iSynth	O
(	O
3D	O
)	O
or	O
Seadragon	B-Operating_System
Mobile	O
(	O
2D	O
only	O
)	O
.	O
</s>
<s>
The	O
Photosynth	B-Application
application	O
was	O
also	O
available	O
from	O
the	O
App	B-Application
Store	I-Application
to	O
download	O
on	O
iPod	B-Device
Touch	I-Device
and	O
iPhone	B-Device
.	O
</s>
<s>
In	O
May	O
2012	O
,	O
Microsoft	O
released	O
a	O
Photosynth	B-Application
App	O
for	O
its	O
mobile	O
platform	O
,	O
Windows	B-Protocol
Phone	I-Protocol
.	O
</s>
<s>
On	O
July	O
10	O
,	O
2015	O
,	O
Microsoft	O
announced	O
that	O
they	O
are	O
retiring	O
the	O
Photosynth	B-Application
Mobile	O
Apps	O
,	O
removing	O
them	O
from	O
their	O
stores	O
,	O
and	O
are	O
no	O
longer	O
supporting	O
or	O
updating	O
them	O
.	O
</s>
<s>
While	O
the	O
Photosynth	B-Application
platform	O
was	O
shut	O
down	O
in	O
early	O
2017	O
,	O
its	O
features	O
re-appeared	O
in	O
the	O
fall	O
within	O
the	O
Microsoft	B-Algorithm
Pix	I-Algorithm
app	O
for	O
iOS	O
,	O
however	O
as	O
of	O
late	O
2020	O
,	O
the	O
Photosynth	B-Application
features	O
appear	O
to	O
no	O
longer	O
be	O
part	O
of	O
the	O
Microsoft	B-Algorithm
Pix	I-Algorithm
app	O
.	O
</s>
<s>
The	O
latest	O
generation	O
of	O
photosynths	B-Application
are	O
easy	O
to	O
capture	O
,	O
as	O
photographs	O
taken	O
by	O
any	O
regular	O
digital	O
camera	O
or	O
mobile	O
phone	O
can	O
be	O
uploaded	O
to	O
Photosynth	B-Application
.	O
</s>
<s>
Users	O
have	O
the	O
option	O
to	O
geotag	O
their	O
digital	O
shots	O
on	O
sites	O
such	O
as	O
Flickr	B-Algorithm
and	O
then	O
upload	O
them	O
to	O
the	O
online	O
Photosynth	B-Application
web	O
service	O
.	O
</s>
<s>
Images	O
uploaded	O
on	O
Photosynth	B-Application
give	O
people	O
the	O
ability	O
to	O
seamlessly	O
view	O
landmarks	O
,	O
public	O
spaces	O
and	O
objects	O
from	O
all	O
sides	O
.	O
</s>
<s>
On	O
April	O
30	O
,	O
2008	O
,	O
Photosynth	B-Application
was	O
featured	O
in	O
the	O
episode	O
Admissions	O
of	O
the	O
television	O
show	O
CSI	O
:	O
New	O
York	O
.	O
</s>
<s>
CNN	B-Architecture
utilized	O
Photosynth	B-Application
for	O
a	O
user-contributed	O
3D	O
vision	O
of	O
the	O
inauguration	O
of	O
Barack	O
Obama	O
as	O
the	O
President	O
of	O
the	O
United	O
States	O
.	O
</s>
<s>
In	O
the	O
Angels	O
&	O
Demons	O
"	O
Path	O
of	O
Illumination	O
Contest	O
,	O
"	O
Photosynth	B-Application
is	O
used	O
as	O
well	O
as	O
advertised	O
in	O
the	O
website	O
.	O
</s>
<s>
In	O
the	O
MSN	B-Protocol
's	O
coverage	O
of	O
the	O
70th	O
anniversary	O
of	O
the	O
RAF	O
victory	O
in	O
the	O
Battle	B-Application
of	I-Application
Britain	I-Application
,	O
a	O
Photosynth	B-Application
hangar	O
of	O
some	O
of	O
the	O
fighter	O
planes	O
from	O
the	O
battle	O
was	O
built	O
.	O
</s>
<s>
A	O
series	O
of	O
Photosynths	B-Application
have	O
also	O
been	O
created	O
for	O
the	O
Imperial	O
War	O
Museum	O
Duxford	O
so	O
that	O
web	O
users	O
could	O
experience	O
the	O
planes	O
up	O
close	O
from	O
a	O
range	O
of	O
angles	O
.	O
</s>
