An absolute phase to world coordinates method for the defocusing structured light shape measurement system

Absolute phase recovery in structured light illumination systems: Sinusoidal vs. intensity discrete patterns

“…This socalled look-up table (LUT) technique was among others proposed by Zhong [24] for the case of two fringe patterns. Since then, extensive efforts [25][26][27][28][29][30][31][32] have been made in order to develop more noise robust LUTs [26]. All these phase unwrapping methods require a unique mapping of a given set of phase values to a given integer fringe order.…”