29 April 2016 High-speed digital color fringe projection technique for three-dimensional facial measurements
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Abstract
Digital fringe projection techniques have been widely studied in industrial applications because of the advantages of high accuracy, fast acquisition and non-contact operation. In this study, a single-shot high-speed digital color fringe projection technique is proposed to measure three-dimensional (3-D) facial features. The light source used in the measurement system is structured light with color fringe patterns. A projector with digital light processing is used as light source to project color structured light onto face. The distorted fringe pattern image is captured by the 3-CCD color camera and encoded into red, green and blue channels. The phase-shifting algorithm and quality guided path unwrapping algorithm are used to calculate absolute phase map. The detecting angle of the color camera is adjusted by using a motorized stage. Finally, a complete 3-D facial feature is obtained by our technique. We have successfully achieved simultaneous 3-D phase acquisition, reconstruction and exhibition at a speed of 0.5 s. The experimental results may provide a novel, high accuracy and real-time 3-D shape measurement for facial recognition system.
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Cheng-Yang Liu, Cheng-Yang Liu, Li-Jen Chang, Li-Jen Chang, Chung-Yi Wang, Chung-Yi Wang, "High-speed digital color fringe projection technique for three-dimensional facial measurements", Proc. SPIE 9896, Optics, Photonics and Digital Technologies for Imaging Applications IV, 989611 (29 April 2016); doi: 10.1117/12.2220774; https://doi.org/10.1117/12.2220774
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