High-Speed, High-Resolution 3D Imaging Using Projector Defocusing

High-Speed, High-Resolution 3D Imaging Using Projector Defocusing

Song Zhang (Iowa State University, USA) and Yuanzheng Gong (Iowa State University, USA)
Copyright: © 2012 |Pages: 20
DOI: 10.4018/978-1-61350-326-3.ch007
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With the advance of software and hardware, three-dimensional (3D) scene digitization becomes increasingly important. Over the years, numerous 3D imaging techniques have been developed. Among these techniques, the methods based on analyzing sinusoidal structured (fringe) patterns stand out due to their achievable speed and resolution. With the development of digital video display technologies, digital fringe projection techniques emerge as a mainstream for 3D imaging. However, developing such a system is not easy especially when an off-the-shelf projector is used. The major challenging problems are: (1) the projection system nonlinearity; (2) the precise synchronization requirement; and (3) the projection system speed limit. This chapter will present an alternative route for 3D imaging while reducing these problems. The fundamentals of the proposed technique will be introduced, the analytical and experimental results will be shown, and its advantages and limitations will be addressed.
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Over the past decades, a number of 3D imaging techniques have been developed including some with real-time capability (Huang et al, 2005; Li et al, 2010; Pawlowski et al, 2002; Quan et al, 1995; Takeda & Mutoh, 1983; Zhang & Huang, 2006a). With recent advancement in computational and shape analysis techniques, high-speed 3D imaging has become unprecedentedly important. Over the years, a number of techniques have been developed to reach real-time capability, including spacetime stereo (Zhang, et al, 2004, Davis, et al, 2005), structured light (Rusinkiewicz et al, 2002), and fringe projection (Zhang & Huang 2006). Among these techniques, fringe analysis stands out because of its numerous advantages (Gorthi & Rastogi, 2010).

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