<s>
Rana	O
motion	B-Application
vision	O
system	O
is	O
a	O
motion	B-Application
detection	O
that	O
uses	O
vision	O
to	O
detect	O
the	O
presence	O
of	O
objects	O
within	O
its	O
visual	O
field	O
.	O
</s>
<s>
Rana	O
is	O
based	O
on	O
the	O
open	O
source	O
motion	B-Application
package	O
for	O
Linux	B-Application
,	O
but	O
has	O
significantly	O
enhanced	O
motion	B-Application
detection	O
capabilities	O
.	O
</s>
<s>
Each	O
channel	O
is	O
monitored	O
using	O
a	O
Phillips	O
SPC1330N	O
autofocus	O
USB	B-Protocol
camera	O
which	O
are	O
connected	O
to	O
the	O
Asus	B-Application
Aspire	I-Application
one	I-Application
data	O
logging	O
computer	O
via	O
USB	B-Protocol
2.0	O
connections	O
.	O
</s>
<s>
This	O
logging	O
computer	O
runs	O
C	B-Language
code	O
which	O
implements	O
a	O
motion	B-Application
detector	O
which	O
is	O
loosely	O
modelled	O
on	O
the	O
frog	O
visual	O
system	O
(	O
e.g.	O
</s>
<s>
a	O
blob	B-Algorithm
detector	I-Algorithm
which	O
capable	O
of	O
detecting	O
and	O
tracking	O
blobs	O
of	O
a	O
user	O
determined	O
size	O
)	O
.	O
</s>
<s>
of	O
a	O
Linux	B-Application
kernel	O
.	O
</s>
<s>
This	O
offers	O
a	O
relatively	O
good	O
real	O
time	O
performance	O
on	O
the	O
relatively	O
slow	O
Atom	B-Device
N450	I-Device
processor	O
which	O
was	O
chosen	O
to	O
keep	O
power	O
consumption	O
low	O
(	O
so	O
the	O
logger	O
can	O
operate	O
stand-alone	O
with	O
solar	O
panels	O
in	O
remote	O
field	O
locations	O
)	O
.	O
</s>
<s>
Subsequently	O
,	O
Rana	O
has	O
been	O
ported	O
onto	O
a	O
number	O
of	O
low	O
power	O
ARM	B-Architecture
based	O
devices	O
such	O
as	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
and	O
Odroid	B-Application
]	O
and	O
]	O
which	O
can	O
be	O
operated	O
off	O
the	O
grid	O
in	O
remote	O
field	O
locations	O
.	O
</s>
