Saturation Model and Phase Recovering for Phase Measuring Profilometry

Phase measuring profilometry is a method of structured light illumination whose three-dimensional reconstructions are susceptible to error from intensity saturation. Phase error caused by intensity saturation of fringe patterns is studied in this work. A mathematical model is derived for recovering saturated intensity by means of other patterns without saturation, and thus we can decrease the phase error introduced by the saturation. Both simulation and experiment results show that the phase error arisen from intensity saturation can be efficiently suppressed with the proposed algorithm.