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Atomic Force Microscopy

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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Fringe-width encoded patterns for 3D surface profilometry.

Wenbo Li, Naiji Fan, Yanxue Wu

|November 23, 2021

Summary

This summary is machine-generated.

This study introduces a novel fringe projection technique for 3D surface measurement using fringe-width encoded patterns. This method enables accurate 3D shape reconstruction with minimal equipment, enhancing surface-shape measurement capabilities.

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Area of Science:

Optics and Photonics
Computer Vision
Metrology

Background:

Traditional fringe projection profilometry often requires complex setups or multiple phase-shifted patterns.
Accurate fringe order determination is crucial for robust 3D surface reconstruction.

Purpose of the Study:

To develop a novel fringe projection method for efficient and accurate 3D surface shape measurement.
To enable 3D reconstruction using a minimal number of projected patterns and a single camera-projector system.

Main Methods:

Utilizing novel fringe-width encoded fringe patterns where fringe width serves as a codeword.
Employing a conventional wrapped phase calculation to obtain phase data with coding information.
Applying a region growing algorithm for accurate fringe order correction.

Main Results:

Successfully identified and corrected fringe orders from the wrapped phase data.
Demonstrated the capability for direct surface reconstruction using corrected fringe order and wrapped phase.
Validated the method's effectiveness in both static and dynamic 3D shape measurement scenarios.

Conclusions:

The proposed fringe-width encoding method simplifies 3D surface measurement.
Achieved accurate 3D reconstruction with as few as three projected patterns and a single camera-projector.
This technique offers a promising solution for efficient and high-performance 3D shape analysis.