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In this paper, a novel online signature verification technique based on discrete cosine transform (DCT) and sparse representation is proposed. We find a new property of DCT, which can be used to obtain a compact representation of an online signature using a fixed number of coefficients, leading to simple matching procedures and providing an effective alternative to deal with time series of different...
A novel approach which generates so-called ”potential genuine signatures” by timely nonlinear sampling from an original on-line signature is presented. Velocity vectors of these potential genuine signatures are exploited to construct an user-dependent overcomplete dictionary. Finally, sparse coefficients which served as features are used for verification. There are two main advantages: 1) The DTW...
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