High-speed and high-accuracy 3D surface measurement using a mechanical projector

Jae Sang Hyun, George T.C. Chiu, Song Zhang

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

This paper presents a method to achieve high-speed and high-accuracy 3D surface measurement using a custom-designed mechanical projector and two high-speed cameras. We developed a computational framework that can achieve absolute shape measurement in sub-pixel accuracy through: 1) capturing precisely phase-shifted fringe patterns by synchronizing the cameras with the projector; 2) generating a rough disparity map between two cameras by employing a standard stereo-vision method using texture images with encoded statistical patterns; and 3) utilizing the wrapped phase as a constraint to refine the disparity map. The projector can project binary patterns at a speed of up to 10,000 Hz, and the camera can capture the required number of phase-shifted fringe patterns with 1/10,000 second, and thus 3D shape measurement can be realized as high as 10,000 Hz regardless the number of phase-shifted fringe patterns required for one 3D reconstruction. Experimental results demonstrated the success of our proposed method.

Original languageEnglish
Pages (from-to)1474-1487
Number of pages14
JournalOptics Express
Volume26
Issue number2
DOIs
Publication statusPublished - 2018 Jan 22

Bibliographical note

Funding Information:
National Science Foundation (NSF) (CMMI-1531048).

Publisher Copyright:
© 2018 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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