<s>
Spatial	B-General_Concept
verification	I-General_Concept
is	O
a	O
technique	O
in	O
which	O
similar	O
locations	O
can	O
be	O
identified	O
in	O
an	O
automated	O
way	O
through	O
a	O
sequence	O
of	O
images	O
.	O
</s>
<s>
The	O
general	O
method	O
involves	O
identifying	O
a	O
correlation	O
between	O
certain	O
points	O
among	O
sets	O
images	O
,	O
using	O
techniques	O
similar	O
to	O
those	O
used	O
for	O
image	B-Algorithm
registration	I-Algorithm
.	O
</s>
<s>
The	O
main	O
problem	O
is	O
that	O
outliers	O
(	O
that	O
does	O
not	O
fit	O
or	O
does	O
not	O
match	O
the	O
selected	O
model	O
)	O
affect	O
adjustment	O
called	O
least	B-Algorithm
squares	I-Algorithm
(	O
numerical	O
analysis	O
technique	O
framed	O
in	O
mathematical	O
optimization	O
,	O
which	O
,	O
given	O
an	O
set	O
of	O
ordered	O
pairs	O
:	O
independent	O
variable	O
,	O
dependent	O
variable	O
,	O
and	O
a	O
family	O
of	O
functions	O
,	O
try	O
to	O
find	O
the	O
continuous	O
function	O
)	O
.	O
</s>
<s>
Good	O
results	O
for	O
correspondence	B-Algorithm
in	O
specific	O
instances	O
.	O
</s>
<s>
The	O
spatial	B-General_Concept
verification	I-General_Concept
can	O
not	O
be	O
used	O
as	O
post-processing	O
.	O
</s>
<s>
The	O
most	O
widely	O
used	O
for	O
spatial	B-General_Concept
verification	I-General_Concept
and	O
avoid	O
errors	O
caused	O
by	O
these	O
outliers	O
methods	O
are	O
:	O
</s>
<s>
To	O
specify	O
scenes	O
or	O
objects	O
,	O
is	O
commonly	O
used	O
affine	B-Algorithm
transformations	I-Algorithm
to	O
perform	O
the	O
spatial	B-General_Concept
verification	I-General_Concept
.	O
</s>
<s>
Test	O
:	O
each	O
match	O
is	O
allowed	O
to	O
be	O
performed	O
by	O
the	O
algorithm	O
SIFT	B-Algorithm
and	O
model	O
characteristics	O
vote	O
in	O
the	O
Hough	O
space	O
.	O
</s>
