Abstract

We propose a method for reconstructing non-diffuse surfaces based on the π-phase-shifted two-plus-one phase-shifting method. First, we introduce a 2fH + a + 2fM + 2fL method for unwrapped phase extraction. Subsequently, we introduce a new set of π-phase-shifted 2fH + a/2 + 2fM + 2fL fringe patterns with halved background intensity. The saturated pixels will be replaced with the unsaturated pixels in the π-phase-shifted fringe patterns. Finally, we analyze eight fringe replacement cases and give the corresponding phase calculation, and further give the general formulas. Experiments confirm that the sum of the phase error of the proposed method is 81.4% lower than that of the traditional method, and 61.5% lower than that of the adaptive fringe projection method.

© 2023 Chinese Laser Press

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