<s>
CleVR	B-Algorithm
is	O
a	O
free	O
panoramic	O
photo	B-Algorithm
sharing	I-Algorithm
site	I-Algorithm
and	O
photo	B-Algorithm
stitching	I-Algorithm
software	O
.	O
</s>
<s>
It	O
allows	O
panoramas	O
to	O
be	O
embedded	O
into	O
other	O
web	O
pages	O
using	O
a	O
Flash	B-Operating_System
viewer	O
.	O
</s>
<s>
Panoramas	O
can	O
be	O
displayed	O
with	O
hotspots	B-General_Concept
—	O
areas	O
in	O
the	O
scene	O
that	O
can	O
be	O
clicked	O
to	O
display	O
other	O
content	O
or	O
to	O
navigate	O
to	O
another	O
scene	O
.	O
</s>
<s>
This	O
functionality	O
is	O
similar	O
to	O
that	O
provided	O
by	O
Apple	O
's	O
QuickTime	B-Application
VR	I-Application
,	O
but	O
it	O
allows	O
images	O
,	O
text	O
and	O
Flash	B-Operating_System
Video	I-Operating_System
(	O
FLV	B-Operating_System
)	O
video	O
to	O
be	O
displayed	O
within	O
the	O
panorama	O
window	O
.	O
</s>
<s>
CleVR	B-Algorithm
was	O
originally	O
launched	O
by	O
Clementine	O
in	O
2000	O
as	O
a	O
platform	O
for	O
managing	O
QuickTime	B-Application
VR	I-Application
content	O
.	O
</s>
<s>
The	O
name	O
CleVR	B-Algorithm
is	O
a	O
contraction	O
of	O
"	O
Clementine	O
Virtual	O
Reality	O
"	O
.	O
</s>
<s>
Much	O
of	O
the	O
content	O
from	O
the	O
previous	O
CleVR	B-Algorithm
site	O
was	O
imported	O
to	O
the	O
new	O
platform	O
.	O
</s>
<s>
The	O
new	O
site	O
was	O
a	O
complete	O
rewrite	O
of	O
the	O
old	O
code	O
,	O
and	O
was	O
no	O
longer	O
based	O
on	O
QuickTime	B-Application
VR	I-Application
.	O
</s>
<s>
Instead	O
it	O
used	O
a	O
Flash	B-Operating_System
viewer	O
developed	O
by	O
Clementine	O
to	O
display	O
the	O
panoramas	O
.	O
</s>
<s>
On	O
the	O
current	O
site	O
,	O
the	O
photo	O
stitcher	O
and	O
panorama	O
viewer	O
were	O
developed	O
using	O
Adobe	B-Operating_System
Flash	I-Operating_System
,	O
Flex	B-Operating_System
and	O
AIR	B-Operating_System
.	O
</s>
<s>
The	O
CleVR	B-Algorithm
site	O
is	O
written	O
in	O
PHP	B-Application
,	O
and	O
uses	O
PEAR	B-Application
and	O
ImageMagick	B-Language
.	O
</s>
<s>
Images	O
are	O
hosted	O
using	O
Amazon	B-General_Concept
S3	I-General_Concept
.	O
</s>
<s>
CleVR	B-Algorithm
includes	O
free	O
image	B-Algorithm
stitching	I-Algorithm
software	O
integrated	O
with	O
the	O
site	O
.	O
</s>
<s>
This	O
is	O
an	O
Adobe	B-Operating_System
AIR	I-Operating_System
application	O
,	O
created	O
with	O
Adobe	B-Operating_System
Flex	I-Operating_System
.	O
</s>
<s>
The	O
stitcher	O
generates	O
cylindrical	O
panoramas	O
,	O
the	O
only	O
projection	B-Algorithm
supported	O
by	O
the	O
CleVR	B-Algorithm
website	O
and	O
software	O
.	O
</s>
<s>
The	O
stitcher	O
has	O
fewer	O
features	O
than	O
other	O
image	B-Algorithm
stitching	I-Algorithm
software	O
,	O
but	O
is	O
designed	O
to	O
be	O
simple	O
and	O
easy	O
to	O
use	O
.	O
</s>
<s>
The	O
CleVR	B-Algorithm
photo	B-Algorithm
stitching	I-Algorithm
software	O
can	O
stitch	O
most	O
panoramas	O
without	O
user	O
interaction	O
,	O
but	O
also	O
has	O
support	O
for	O
setting	O
manual	O
control	O
points	O
.	O
</s>
<s>
While	O
the	O
finished	O
panoramas	O
can	O
be	O
saved	O
to	O
the	O
user	O
's	O
computer	O
as	O
a	O
JPEG	O
file	O
,	O
in	O
most	O
cases	O
they	O
will	O
be	O
uploaded	O
to	O
the	O
CleVR	B-Algorithm
website	O
from	O
within	O
the	O
stitcher	O
.	O
</s>
<s>
Users	O
can	O
also	O
use	O
other	O
stitching	O
software	O
to	O
create	O
panoramas	O
and	O
upload	O
them	O
to	O
CleVR	B-Algorithm
.	O
</s>
<s>
The	O
most	O
distinguishing	O
feature	O
of	O
CleVR	B-Algorithm
is	O
the	O
way	O
it	O
allows	O
panoramas	O
to	O
be	O
easily	O
shared	O
and	O
posted	O
on	O
other	O
sites	O
.	O
</s>
<s>
This	O
is	O
done	O
in	O
a	O
manner	O
similar	O
to	O
services	O
such	O
as	O
YouTube	B-General_Concept
,	O
using	O
a	O
Flash-based	O
viewer	O
that	O
can	O
be	O
embedded	O
in	O
a	O
web	O
page	O
or	O
viewed	O
on	O
the	O
CleVR	B-Algorithm
site	O
.	O
</s>
<s>
The	O
viewer	O
re-projects	O
the	O
equirectangular	O
panorama	O
to	O
an	O
orthographic	O
projection	B-Algorithm
so	O
that	O
the	O
view	O
appears	O
more	O
natural	O
,	O
without	O
the	O
curved	O
lines	O
otherwise	O
typical	O
for	O
panoramic	O
photographs	O
.	O
</s>
<s>
It	O
also	O
overlays	O
the	O
clickable	O
hotspots	B-General_Concept
for	O
navigation	O
and	O
the	O
display	O
of	O
text	O
,	O
images	O
and	O
video	O
.	O
</s>
