Journal
APPLIED OPTICS
Volume 53, Issue 16, Pages 3415-3426Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.53.003415
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Funding
- National Science Foundation (NSF) [CMMI-1150711, CMMI-1300376]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1523048] Funding Source: National Science Foundation
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A structured-light system with a binary defocusing technique has the potential to have more extensive application due to its high speeds, gamma-calibration-free nature, and lack of rigid synchronization requirements between the camera and projector. However, the existing calibration methods fail to achieve high accuracy for a structured-light system with an out-of-focus projector. This paper proposes a method that can accurately calibrate a structured-light system even when the projector is not in focus, making it possible for high-accuracy and high-speed measurement with the binary defocusing method. Experiments demonstrate that our calibration approach performs consistently under different defocusing degrees, and a root-mean-square error of about 73 mu m can be achieved with a calibration volume of 150(H) mm x 250(W) mm x 200(D)mm. (C) 2014 Optical Society of America
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