Perspective Imaging under Structured Light “ Supplementary Material ”

(1) The term α A Z,ξ0,η0 r(x, y) represents scene information that is of interest. Its magnitude spectrum peaks as DC, since it is a real-positive signal. Following modulation, the DC component of the scene information shifts to the carrier frequency (μμhξ0, μμvη0). We exploit this fact to identify the carrier frequency as the abscissa & ordinate of the largest value in the magnitude spectrum of m(x, y). Fig.[1] illustrates the above fact. The peaks in the magnitude spectra |M±(ξ, η)| correspond to the frequency of the modulating pattern. Tauber et.al.[1] propose a similar strategy to estimate the frequency of the modulating pattern. The above strategy implicitly assumes that the magnitude spectrum of the scene information αA Z,ξ0,η0 r(x, y), satisfies the following inequality