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A survey of approaches and challenges in 3D and multi-modal 3D+2D face recognition
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In this paper, we will review several different 3D scanning devices. We will present a method for empirical accuracy analysis, and apply it to several scanners providing an overview of their technologies. The scanners include both general purpose and face specific scanning devices. We will focus on face scanning technique, although the technique should be applicable to other domains as well. The proposed method involves several different calibration faces of known shape and comparisons of their scans to investigate both absolute accuracy and repeatability.