Imaging Components, Systems, and Processing

Decoding line structured light patterns by using Fourier analysis

[+] Author Affiliations
Yunfei Long, Shuaijun Wang, Kai Liu

Sichuan University, School of Electrical Engineering and Information, #24 South Section 1, Yihuan Road, Chengdu, Sichuan Province 610065, China

Wei Wu, Xiaomin Yang

Sichuan University, College of Electronics and Information Engineering, #24 South Section 1, Yihuan Road, Chengdu, Sichuan Province 610065, China

Gwanggil Jeon

Incheon National University, Department of Embedded Systems Engineering, #119 Academy-ro, Yeonsu-gu, Incheon 406-772, Republic of Korea

Opt. Eng. 54(7), 073109 (Jul 23, 2015). doi:10.1117/1.OE.54.7.073109
History: Received February 23, 2015; Accepted June 22, 2015
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Abstract.  Line structured light techniques, especially laser scanning, are preferred for commercialized three-dimensional (3-D) shape acquisition. Typically, a captured line stripe is to be detected spatially within a single image, and the detection may fail if there are ambiguities in the image. We present a decoding strategy for line structured light patterns. Over all recorded line-patterned images, by means of Fourier analysis along the time axis for each pixel, a phase map is computed and employed for 3-D reconstruction. The phase error is theoretically analyzed. Experimental results demonstrate that, compared with typical approaches based on spatial stripe peak detection, the proposed method achieves comparable accuracy and, most importantly, successfully handles the issue of ambiguities.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Yunfei Long ; Shuaijun Wang ; Wei Wu ; Xiaomin Yang ; Gwanggil Jeon, et al.
"Decoding line structured light patterns by using Fourier analysis", Opt. Eng. 54(7), 073109 (Jul 23, 2015). ; http://dx.doi.org/10.1117/1.OE.54.7.073109


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