
Regularized Phase Estimation Methods in Interferometry ◾ 161
In Figure5.8, we show the real and imaginary parts of the com-
plex-valued membrane ltered eld f(x, y) in Equation 5.30. We can
see how the demodulated phase φ(x, y) is almost free of distortion
because of the boundary P(x, y) of the interferogram.
5.5 CONVOLUTION-BASED SPATIAL-
CARRIER INTERFEROMETRY
Spatial linear carrier interferometry (also called the Fourier method) is
credited to Ichioka and Inuiya [14] and Takeda et al. [15]. In this method, a
linear spatial carrier is introduced to a single-image interferogram. us,
the interferometric data may be written as