High-speed three-dimensional absolute shape measurement with three projected binary patterns

Jae Sang Hyun, Song Zhang

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Reducing the number of structured patterns for three-dimensional (3-D) reconstruction is of great importance for high-speed 3-D shape measurement. We present a method that reconstructs absolute 3-D shape using three projected binary patterns: One direct current (DC), one low-frequency, and one high-frequency fringe pattern. The procedures are (1) take the difference between the sinusoidal fringe patterns and the DC pattern; (2) apply Hilbert transform to the difference images to generate two phase maps; (3) employ the geometric-constraint-based phase unwrapping method to unwrap the low-frequency phase map; (4) unwrap the high-frequency phase map using the unwrapped low-frequency phase map; and (5) reconstruct 3-D shape. We developed a prototype system that can capture two-dimensional images at 6000 Hz, achieving 2000 Hz 3-D shape measurement speed.

Original languageEnglish
Article number024104
JournalOptical Engineering
Issue number2
Publication statusPublished - 2020 Feb 1

Bibliographical note

Funding Information:
This study was sponsored by the National Science Foundation (NSF) under Grant No. III-1637961. The views expressed in this paper are those of the authors and not necessarily those of the NSF.

Publisher Copyright:
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)


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