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Updated: Aug 25, 2025
11:34
High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
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Dual-biprism-based coaxial fringe projection system
Applied Optics
|October 18, 2022
Summary
This study introduces a novel coaxial fringe projection profilometry (FPP) system using dual biprisms to overcome occlusion and shadow issues in 3D shape measurement of complex surfaces.
Area of Science:
- Optical Metrology
- 3D Shape Measurement
- Computer Vision
Background:
- Fringe projection profilometry (FPP) is a common technique for 3D shape measurement due to its accuracy and simple hardware.
- Standard FPP systems struggle with complex surfaces, leading to occlusion and shadows, limiting their application.
Purpose of the Study:
- To develop an improved FPP method that minimizes occlusion and shadows for complex 3D surface reconstruction.
- To present a low-cost, mechanically simple coaxial measurement system.
Main Methods:
- A coaxial measurement system utilizing dual biprisms was designed and implemented.
- The system leverages geometric constraints from the biprisms for 3D surface reconstruction without mechanical movement.
Main Results:
- Experimental validation was performed on surfaces with significant height changes.
- The proposed dual-biprism coaxial FPP method successfully achieved shadow-free 3D measurements.
Conclusions:
- The dual-biprism coaxial FPP system effectively addresses occlusion and shadow problems in 3D shape measurement.
- This method offers a practical and accurate solution for measuring complex geometries.
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