Given
: Measured data
𝐃
1
𝐟
(
𝛼
,
𝜔
)
for
𝛼
∈
Γ
,
𝜔
∈
𝑆
2
Output : Approximation
𝐟
𝛾
to
𝐟
Compute:
(1)
𝐠
(
𝛼
,
𝜔
)
=
𝐃
1
𝐟
(
𝛼
,
𝜔
)
𝜔
(2)
(
𝐟
𝛾
)
𝑗
(
𝑥
)
=
𝐠
,
𝐕
𝑗
𝛾
(
𝑥
)
𝐿
2
(
Γ
×
𝑆
2
,
ℝ
3
)
=
∫
Γ
∫
𝑆
2
𝐠
(
𝛼
,
𝜔
)
,
𝐕
𝑗
𝛾
(
𝑥
;
𝛼
,
𝜔
)
d
𝑆
(
𝜔
)
d
𝛼
=
∫
Γ
∫
𝑆
2
𝐃
1
𝐟
(
𝛼
,
𝜔
)
𝜔
𝑗
𝑣
𝛾
(
𝑥
;
𝛼
,
𝜔
)
d
𝑆
(
𝜔
)
d
𝛼
for
𝑗
∈
{
1
,
2
,
3
}
Algorithm 1:
For cone beam VFT.