Fourier normalized-fringe analysis by zero-order spectrum suppression using a parameter estimation approach
What's it about?
The Fourier method for wrapped phase extraction is studied. We analyze the effects of the zero-order spectrum associated to the background light. Then, the benefits of the fringe pattern normalization is examined.
Why is it important?
The zero-order spectrum can represent a serious source of error. Moreover, the resolution could be significantly reduced. We found that the zero-order spectrum is suppressed efficiently when the fringe patterns are normalized. Thus, the filtering procedure is simplified, and the spatial resolution is increased.