High-contrast 3D surface measurement without changing camera exposures

Chufan Jiang; Song Zhang

doi:10.1117/12.2225227

19 May 2016 High-contrast 3D surface measurement without changing camera exposures

Chufan Jiang, Song Zhang

Proceedings Volume 9868, Dimensional Optical Metrology and Inspection for Practical Applications V; 98680E (2016) https://doi.org/10.1117/12.2225227
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

Abstract

This paper proposes a method that does not require to change exposure time of the camera for high-quality surface measurement when the surface contrast is large. The idea is that three phase-shifted inverted fringe patterns are used to complement regular three phase-shifted fringe patterns for phase retrieval. For saturated pixels, the inverted fringe patterns will be used in lieu of the original patterns for phase computation. Though not as robust as some of previously proposed time-consuming methods, experimental data showed that the proposed method can substantially increase measurement quality for high-contrast surfaces.

Citation Download Citation

Chufan Jiang and Song Zhang "High-contrast 3D surface measurement without changing camera exposures", Proc. SPIE 9868, Dimensional Optical Metrology and Inspection for Practical Applications V, 98680E (19 May 2016); https://doi.org/10.1117/12.2225227

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KEYWORDS

Fringe analysis

High dynamic range imaging

3D metrology

3D modeling

Cameras

Phase shifts

Reconstruction algorithms

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