<s>
3DF	B-Application
Zephyr	I-Application
is	O
a	O
commercial	B-Application
photogrammetry	B-Application
and	O
3D	O
modeling	O
software	O
.	O
</s>
<s>
Developed	O
and	O
marketed	O
by	O
the	O
Italian	O
software	O
house	O
3DFLOW	O
,	O
3DF	B-Application
Zephyr	I-Application
was	O
first	O
released	O
in	O
January	O
2014	O
and	O
continuously	O
updated	O
since	O
then	O
.	O
</s>
<s>
It	O
's	O
a	O
complete	O
photogrammetry	B-Application
pipeline	B-General_Concept
software	O
package	O
that	O
includes	O
many	O
post	O
processing	O
tools	O
for	O
post	O
processing	O
,	O
measurements	O
,	O
3D	O
modeling	O
and	O
content	O
creation	O
.	O
</s>
<s>
It	O
allows	O
3D	B-Algorithm
reconstruction	I-Algorithm
from	O
both	O
photos	O
or	O
videos	O
,	O
by	O
automatically	O
extracting	O
frames	O
and	O
selecting	O
those	O
most	O
suitable	O
for	O
the	O
computation	O
.	O
</s>
<s>
The	O
technology	O
behind	O
3DF	B-Application
Zephyr	I-Application
has	O
been	O
completely	O
in-house	O
built	O
by	O
3DFLOW	O
,	O
rather	O
than	O
relying	O
on	O
computer	B-Application
vision	I-Application
third	O
party	O
libraries	O
like	O
most	O
of	O
its	O
competitors	O
.	O
</s>
<s>
Initially	O
released	O
as	O
3DF	B-Application
Zephyr	I-Application
Pro	O
,	O
a	O
consumer-targeted	O
edition	O
was	O
released	O
shortly	O
,	O
3DF	B-Application
Zephyr	I-Application
Lite	O
and	O
then	O
a	O
GIS	B-Application
and	O
mapping	O
oriented	O
edition	O
as	O
well	O
,	O
3DF	B-Application
Zephyr	I-Application
Aerial	O
.	O
</s>
<s>
Since	O
5.0	O
however	O
,	O
the	O
Pro	O
and	O
Aerial	O
edition	O
were	O
discontinued	O
and	O
merged	O
into	O
a	O
new	O
full	O
version	O
(	O
called	O
3DF	B-Application
Zephyr	I-Application
)	O
,	O
while	O
maintaining	O
3DF	B-Application
Zephyr	I-Application
Lite	O
and	O
3DF	B-Application
Zephyr	I-Application
Free	O
as	O
separate	O
packages	O
.	O
</s>
<s>
The	O
technology	O
behind	O
3DF	B-Application
Zephyr	I-Application
is	O
also	O
academically	O
traceable	O
,	O
as	O
it	O
can	O
be	O
found	O
cited	O
in	O
more	O
than	O
100	O
papers	O
.	O
</s>
<s>
3DF	B-Application
Zephyr	I-Application
has	O
been	O
one	O
of	O
the	O
first	O
photogrammetry	B-Application
software	O
tailored	O
also	O
for	O
hobbyists	O
and	O
enthusiasts	O
:	O
it	O
's	O
the	O
first	O
photogrammetry	B-Application
software	O
to	O
be	O
ever	O
published	O
on	O
Steam	B-Application
and	O
one	O
of	O
the	O
few	O
fully	O
featured	O
photogrammetry	B-Application
software	O
packages	O
available	O
for	O
free	O
.	O
</s>
<s>
All	O
the	O
3DF	B-Application
Zephyr	I-Application
packages	O
share	O
the	O
same	O
proprietary	B-Application
reconstruction	O
engine	O
from	O
3DFLOW	O
and	O
bundle	O
the	O
automatic	O
image	O
masking	O
software	O
3DF	O
Masquerade	O
,	O
while	O
the	O
complete	O
edition	O
3DF	B-Application
Zephyr	I-Application
bundles	O
3DF	O
Scarlet	O
which	O
is	O
a	O
dedicated	O
software	O
for	O
laser	O
scan	O
registration	O
.	O
</s>
