signature=770d12473e5058862c721ea7c1ad51db,Signature Features
摘要：
Synonyms Signature characteristics Definition Signature features represent magnitudes that are extracted from digitized signature samples, with the aim of describing each signature as a vector of values. The extraction and selection of optimum signature features is a crucial step when designing a verification system. Features must allow each signature to be described in a way that the discriminative power between signatures produced by different users is maximized while allowing variability among signatures from the same user. On-line signature features can be divided into two main types. Global features model the signature as a holistic multidimensional vector and represent magnitudes such as average speed, total duration, and aspect ratio. On the other hand, local features are time-functions derived from the signals, such as the pen-position coordinate sequence or pressure signals, captured with digitizer tablets or touch-screens. In off-line signature verification syste ...
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