In fringe projection profilometry (FPP), temporal phase unwrapping is an essential
procedure to recover an unambiguous absolute phase even in the presence of large …

Large components are widely used in aerospace, shipbuilding, automobile, and other fields.
The accuracy of three-dimension (3D) measurement is an important standard to measure …

During recent years, the use of fringe projection techniques for generating three-
dimensional (3D) surface information has become one of the most active research areas in …

We first provide an overview of 3-D shape measurement using various optical methods.
Then we focus on structured light techniques where various optical configurations, image …

Visible-light optical coherence tomography (vis-OCT) is an emerging imaging modality,
providing new capabilities in both anatomical and functional imaging of biological tissue. It …

Phase unwrapping algorithm plays very important role in noncontract optical profilometry,
beacuse the phase map acquired derectly is limited from π to− π, which is called wrapped …

A novel dual-frequency pattern is developed which combines a high-frequency sinusoid
component with a unit-frequency sinusoid component, where the high-frequency component …

The field of optical metrology offers a wealth of both practical and theoretical
accomplishments, and can cite any number of academic papers recording such. However …

For fringe projection profilometry (FPP), phase extraction accuracy determines three-
dimensional (3D) measurement precision. The combination of phase-shifting (PS) and multi …

We present a novel color fringe projection system to obtain absolute 3D shape and color of
objects simultaneously. Optimum 3-frequency interferometry is used to produce time efficient …