Hilbert transform based phase extraction algorithm for fringe projection profilometry

Abstract

Fringe projection profilometry is one of the most widely used techniques for 3D shape measurement, including digital model generation, system identification, rapid prototyping, object replication, quality control, etc. In order to extract the desired profile information of the test object from the deformed fringe projected interferograms, in this paper, Hilbert transform based fringe analysis technique is utilized. Using analysis based on simulations, the efficiency of the proposed strategy is calculated. The retrieved results are compared with conventional single step as well as multi step phase extraction algorithms. Obtained results conclusively establish Hilbert transform to be optimum as compared to conventional techniques. © 2018 IEEE.