Windowed Fourier ridges as a spatial carrier phase-shifting algorithm

Abstract

© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). The windowed Fourier ridges (WFR) algorithm is shown to be a phase-shifting algorithm for phase extraction from a carrier fringe pattern. However, the former only provides a phase estimation with a controllable phase error, whereas the latter pursues exact phase extraction. This link not only is interesting but also enhances the understanding of different phase extraction techniques. Advantages and disadvantages of the WFRs algorithm are discussed.