Abstract: | |
This work proposes a two-step phase-shifting algorithm as an improvement of fringe projection profilometry. Considering the working process of fringe projection, the captured fringe image is formulated with two variables, i.e. surface reflectivity and phase value. And a phase shift of 3π/2 is introduced to get the two-step phase-shifting. After appropriate variable substitution, expressions of two fringe images can be transformed into two equations corresponding to a line and a circle respectively. With this circle-line model, the characteristic of solution and the phase error due to non-zero ambient light are analyzed. Then the approach of error compensation is proposed based on estimation of the real fringe contrast and non-linear least square optimization. The validity of the proposed approach is demonstrated with both simulations and experiments.
|
|
License of this version: | Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich. |
Publication type: | BookPart |
Publishing status: | publishedVersion |
Publication date: | 2018 |
Keywords english: | dynamic 3D shape measurement, fringe projection profilometry, phase-shifting profilometry, surface reflectivity, two-step phase-shifting, Error compensation, Profilometry, Reflection, Dynamic 3D shapes, Fringe projection profilometry, Model and analysis, Non-linear least squares, Phase-shifting, Phase-shifting algorithm, Surface reflectivity, Variable substitution, Projection systems |
DDC: | 600 | Technik |
Controlled keywords(GND): | Konferenzschrift |
Showing items related by title, author, creator and subject.