<s>
The	O
signal	B-Algorithm
transfer	I-Algorithm
function	I-Algorithm
(	O
SiTF	O
)	O
is	O
a	O
measure	O
of	O
the	O
signal	O
output	O
versus	O
the	O
signal	O
input	O
of	O
a	O
system	O
such	O
as	O
an	O
infrared	O
system	O
or	O
sensor	O
.	O
</s>
<s>
A	O
second	O
order	O
polynomial	O
curve	O
is	O
fitted	B-Algorithm
to	O
the	O
data	O
of	O
each	O
line	B-Application
.	O
</s>
<s>
color-correlated	O
temperature	O
,	O
pixel	B-Algorithm
intensity	O
,	O
etc	O
.	O
)	O
.	O
</s>
<s>
The	O
slope	O
of	O
the	O
linear	O
portion	O
of	O
this	O
curve	O
is	O
then	O
found	O
using	O
the	B-Algorithm
method	I-Algorithm
of	I-Algorithm
least	I-Algorithm
squares	I-Algorithm
.	O
</s>
<s>
All	O
the	O
data	O
points	O
in	O
the	O
linear	O
region	O
of	O
the	O
SiTF	O
curve	O
can	O
be	O
used	O
in	O
the	B-Algorithm
method	I-Algorithm
of	I-Algorithm
least	I-Algorithm
squares	I-Algorithm
to	O
find	O
a	O
linear	O
approximation	O
.	O
</s>
<s>
Given	O
data	O
points	O
a	O
best	B-Algorithm
fit	I-Algorithm
line	B-Application
parameterized	O
as	O
is	O
given	O
by	O
:	O
</s>
