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Proceedings Paper

High-speed 3D imaging with three binary patterns using Hilbert transform
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Paper Abstract

The number of patterns used to reconstruct one 3D image is of great importance to high-speed 3D shape measurement. This paper presents a method to reduce the number of patterns by using Hilbert transform with only three binary patterns. Two fringe patterns at different frequencies and one DC component pattern are used for absolute phase retrieval. We directly applied Hilbert transform to the difference maps generated by subtracting the DC component from the fringe patterns. Then, with two-frequency phase unwrapping method using geometric constraints, the absolute phase is retrieved robustly. We designed a system to capture 2D images at 6,000 Hz, and achieved 3D geometries at 2,000 Hz. Experimental results verified the success of the proposed method.

Paper Details

Date Published: 3 September 2019
PDF: 8 pages
Proc. SPIE 11102, Applied Optical Metrology III, 1110208 (3 September 2019); doi: 10.1117/12.2524923
Show Author Affiliations
Jae-Sang Hyun, Purdue Univ. (United States)
Song Zhang, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 11102:
Applied Optical Metrology III
Erik Novak; James D. Trolinger, Editor(s)

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