<s>
Vuforia	B-Application
is	O
an	O
augmented	B-General_Concept
reality	I-General_Concept
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
for	O
mobile	O
devices	O
that	O
enables	O
the	O
creation	O
of	O
augmented	B-General_Concept
reality	I-General_Concept
applications	O
.	O
</s>
<s>
The	O
virtual	O
object	O
then	O
tracks	O
the	O
position	O
and	O
orientation	O
of	O
the	O
image	O
in	O
real-time	O
so	O
that	O
the	O
viewer	O
's	O
perspective	B-Architecture
on	O
the	O
object	O
corresponds	O
with	O
the	O
perspective	B-Architecture
on	O
the	O
target	O
.	O
</s>
<s>
The	O
Vuforia	B-Application
SDK	O
supports	O
a	O
variety	O
of	O
2D	O
and	O
3D	O
target	O
types	O
including	O
‘	O
markerless’	O
Image	O
Targets	O
,	O
3D	O
Model	O
Target	O
,	O
and	O
a	O
form	O
of	O
addressable	O
Fiducial	O
Marker	O
,	O
known	O
as	O
a	O
VuMark	O
.	O
</s>
<s>
Additional	O
features	O
of	O
the	O
SDK	O
include	O
6	O
degrees	O
of	O
freedom	O
device	O
localization	O
in	O
space	O
,	O
localized	O
Occlusion	O
Detection	O
using	O
‘	O
Virtual	O
Buttons’	O
,	O
runtime	B-Application
image	O
target	O
selection	O
,	O
and	O
the	O
ability	O
to	O
create	O
and	O
reconfigure	O
target	O
sets	O
programmatically	O
at	O
runtime	B-Application
.	O
</s>
<s>
Vuforia	B-Application
provides	O
Application	B-Application
Programming	I-Application
Interfaces	I-Application
(	O
API	B-Application
)	O
in	O
C++	B-Language
,	O
Java	B-Language
,	O
Objective-C	O
++	O
,	O
and	O
the	O
.NET	B-Application
languages	O
through	O
an	O
extension	O
to	O
the	O
Unity	B-Application
game	I-Application
engine	I-Application
.	O
</s>
<s>
Vuforia	B-Application
has	O
been	O
acquired	O
by	O
PTC	O
Inc	O
.	O
in	O
November	O
2015	O
.	O
</s>
