Abstract
A background removal method based on two-dimensional notch filtering
in the frequency domain for polarization interference imaging
spectrometers (PIISs) is implemented. According to the relationship
between the spatial domain and the frequency domain, the notch filter is
designed with several parameters of PIISs, and the interferogram without a
background is obtained. Both the simulated and the experimental results
demonstrate that the background removal method is feasible and robust with
a high processing speed. In addition, this method can reduce the noise
level of the reconstructed spectrum, and it is insusceptible to a
complicated background, compared with the polynomial fitting and empirical
mode decomposition (EMD) methods.
© 2016 Chinese Laser Press
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