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Open AccessArticle

A Simple and Practical Single-Camera Stereo-Digital Image Correlation Using a Color Camera and X-Cube Prism

by Bo Dong 1, Fancang Zeng 1 and Bing Pan 1,2,*
1
Institute of Solid Mechanics, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
2
Beijing Advanced Discipline Center of Unmanned Aircraft System, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(21), 4726; https://doi.org/10.3390/s19214726
Received: 8 October 2019 / Revised: 27 October 2019 / Accepted: 30 October 2019 / Published: 31 October 2019
(This article belongs to the Section Remote Sensors)
A simple and practical full-frame single-camera stereo-digital image correlation (stereo-DIC) technique for three-dimensional (3D) shape, displacement, and deformation measurements is proposed. The technique uses a compact X-cube prism-based color separation device and a color camera to capture images of blue and red colors from different optical paths, and then extracts the surface 3D shape and deformation information of a test sample by processing the captured two sub-channel color images using regular stereo-DIC algorithm. Compared with the existing full-frame single-camera stereo-DICs, the proposed one eliminates the need for a beam splitter and two bandpass filters to capture images, and offers more simple, compact, and easy-to-use optical arrangement. This novel single-camera stereo-DIC technique was validated by a series of baseline experiments involving 3D surface reconstructions, translation tests, and full-field deformation measurements, which provide a new flexible and practical avenue for measuring surface 3D shape and deformation, particularly in microscopic and high-speed applications. View Full-Text
Keywords: stereo digital image correlation; color camera; X-cube prism; deformation measurement stereo digital image correlation; color camera; X-cube prism; deformation measurement
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Dong, B.; Zeng, F.; Pan, B. A Simple and Practical Single-Camera Stereo-Digital Image Correlation Using a Color Camera and X-Cube Prism. Sensors 2019, 19, 4726.

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