2D-PIR Extraction
If
S
is a scene graph containing:
R
st
(A,B) = [ (t
1
,xp
1
,yp
1
,I
1
), (t
2
,xp
2
,yp
2
,I
2
),... (t
n
,xp
n
,yp
n
,I
n
) ]
then
S.st-seq(A,B)
is the sequence:
[ (t
1
,xp
1
,yp
1
), (t
2
,xp
2
,yp
2
),... (t
n
,xp
n
,yp
n
) ]
