
Regularized Phase Estimation Methods in Interferometry ◾ 171
where p(x, y) is a local phase-plane approximation given as
(,)= (,)(,)()(,)( ), (,
(5.62)
with Γ a given square neighborhood around
. e functions
,
u(x, y), and v(x, y) are respectively, the local (searched) phase and the local
spatial frequencies of the fringe-pattern. In practice, the sizes of neighbor-
hood Γ are usually from 5 × 5 to 15 × 15 pixels. en, a cost function to
estimate the parameters of the local phase-plane approximation is pro-
posed. is cost function is given in the following way:
ϕηξ−
′
ηξ +
′
ηξ +
+
′
ηξ −+ηϕ ηξ −η ...