Calibration of fringe projection profilometry: A comparative review

Fringe projection profilometry is widely used for three-dimensional (3D) measurements. System calibration is crucial to fringe projection systems, since it determines how the phase is converted into 3D geometry. Many methods and studies on calibration have been presented in the last few years. However, a comparative overview on the accuracy and the implementation details is still lacking. In this work, we present a review of some of the most used calibration methods. First, the basic principles are reviewed. Then, both quantitative and qualitative comparative experiments are implemented to show the advantages and constraints of each method. Further, a number of factors that may affect the performance of the calibration are discussed. Sample codes are available for better comprehension and a quick start of these methods.