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Spoofing attacks mainly include printing artifacts, electronic screens and ultra-realistic face masks or models. In this paper, we propose a component-based face coding approach for liveness detection. The proposed method consists of four steps: (1) locating the components of face; (2) coding the low-level features respectively for all the components; (3) deriving the high-level face representation...
A novel feature extraction method is proposed in this paper. Dislike contour-based or region-based approaches, an object is first converted to a closed curve by extended central projection (ECP). The derived curve not only keeps the affine transform information, but also is very robust to noise. Then whitening transform is performed to the curve such that the affine transformation is simplified to...
In this paper, an approach called orthogonal projection transform (OPT) is proposed for invariant shape description. It is inspired by the construction of orthogonal Fourier-Mellin moments (OFMMs), but integral is only performed along lines with different polar angles in the proposed approach. By performing OPT, any object can be converted to a set of closed curves. In comparison with moment based...
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