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

This paper provides a review for absolute phase recovery methods that are applicable for
digital fringe projection (DFP) systems. Specifically, we present two conventional absolute …

Abstract Three-dimensional (3D) surface geometry provides elemental information in
various sciences and precision engineering. Fringe Projection Profilometry (FPP) is one of …

In optical metrology, fringe projection is considered to be one of the most reliable techniques
for recovering the shape of objects. For this technique, however, it is challenging to measure …

Phase-shifting profilometry combined with Gray-code patterns projection has been widely
used for 3D measurement. In this technique, a phase-shifting algorithm is used to calculate …

Phase unwrapping, either spatial or temporal, plays an important role in fringe projection
profilometry (FPP) to recover a continuous phase map. Compared with the spatial phase …

In order to achieve a higher speed for fringe projection profilometry, we propose a
quaternary gray-code phase unwrapping method using only two defocused binary patterns …

Phase shifting profilometry (PSP) using binary fringe patterns with projector defocusing is
promising for high-speed 3D shape measurement. To obtain a high-quality phase, the …

Fringe projection profilometry is an effective technique for handheld three-dimensional
shape measurement because of its high resolution and accuracy. However, it is hard to …

Abstract Three-dimensional (3D) imaging and sensing technologies, as valuable information
acquisition tools for perceiving the real 3D world, provide data bases for the reconstruction …