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A Behavioral Assay to Measure Responsiveness of Zebrafish to Changes in Light Intensities

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Published on: October 3, 2008

High dynamic range 3D shape measurement based on the intensity response function of a camera.

Liang Zhang, Qian Chen, Chao Zuo

|February 23, 2018

Summary

This study introduces a new fringe projection profilometry technique to overcome limitations with high dynamic range (HDR) objects. The method accurately measures objects with varying surface reflectivity, enhancing 3D measurement capabilities.

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Last Updated: Feb 14, 2026

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Area of Science:

Optics and Photonics
3D Metrology
Computer Vision

Background:

Fringe projection profilometry is a popular 3D measurement technique due to its speed, accuracy, and robustness.
A key limitation is its vulnerability to objects with high dynamic range (HDR) in surface reflectivity.
Existing methods struggle to accurately capture detailed 3D surface information from HDR objects.

Purpose of the Study:

To develop an enhanced fringe projection profilometry technique capable of handling high dynamic range (HDR) objects.
To improve the accuracy and reliability of 3D surface measurements for objects with significant variations in reflectivity.
To extend the applicability of fringe projection profilometry to a wider range of challenging surfaces.

Main Methods:

Generating multiple fringe patterns optimized for different light intensities based on camera's intensity response function.
Acquiring high dynamic range (HDR) fringe images by fusing these specially generated fringe patterns.
Employing a three-step phase-shifting algorithm on the fused images to obtain unwrapped phase data.

Main Results:

Successfully demonstrated accurate 3D surface measurement of objects exhibiting HDR reflectivity variations.
The proposed technique effectively overcomes the limitations of standard fringe projection profilometry for HDR surfaces.
Experimental results validate the robustness and precision of the enhanced dynamic range system.

Conclusions:

The developed technique significantly enhances the dynamic range of fringe projection profilometry systems.
This advancement enables precise 3D measurements of objects previously challenging due to reflectivity variations.
The method offers a practical solution for improving 3D metrology in diverse industrial and scientific applications.