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Updated: Jun 19, 2026
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
15.7K
Quasi-pointwise two-step phase-shifting profilometry with the fringe parameters estimated statistically
Applied Optics
|September 14, 2023
Summary
This study introduces a new quasi-pointwise algorithm for fringe projection profilometry. It improves 3D measurement accuracy, especially for surfaces with discontinuities, by accounting for projector and camera dynamic range offsets.
Area of Science:
- Optics and Photonics
- Metrology and Measurement Science
- Computer Vision and Image Processing
Background:
- Fringe projection profilometry is a key 3D measurement technique.
- Two-step phase-shifting algorithms offer a balance of speed and resolution.
- Existing methods struggle with accuracy at object edges and discontinuities.
Purpose of the Study:
- To develop a novel quasi-pointwise algorithm for fringe projection profilometry.
- To address accuracy degradation at object surface discontinuities.
- To improve 3D measurement precision by accurately estimating fringe parameters.
Main Methods:
- A quasi-pointwise two-step phase-shifting algorithm is proposed.
- The algorithm models fringe patterns considering projector and camera dynamic range offsets.
- Fringe parameters are estimated using statistical analysis of fringe intensities.
Main Results:
- The proposed algorithm calculates fringe phases pointwise using two fringe patterns with a π/2 phase difference.
- It effectively models captured fringe patterns by incorporating dynamic range offsets.
- Simulation and experimental results show reduced errors on surfaces with isolated regions and discontinuities.
Conclusions:
- The quasi-pointwise algorithm enhances the accuracy of fringe projection profilometry.
- It provides a robust solution for measuring complex object surfaces.
- This method offers improved 3D measurement capabilities for challenging geometries.
