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A novel phase-unwrapping algorithm is proposed by using interlaced fringe in optical 3-D measurement. In the measurement, a four-step phase-shift method including four sinusoidal fringes with 90 phase shift is used. On top of these four fringes, an interlaced fringe is encoded. In the measurement, all these designed fringes are projected onto the tested object, and fringe images are acquired...
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