The allthors are proposing a ncw personal authentication mct , hod espccially suitable for mobile envi − ronment , Signaturcs are wri 抗 ell in the air and tlley are 〔 ・ aphlred by a video camera . Since video camcra8 have sma11 〔 ÷r size t「 han tablet , devices 、 it wollld be able t'} coIltribllte to redllce terminal sizes . We bnilt a prototype system al1 〔l have evaluat 〔 xi our rriechanisrn in some ideal environmen し Ill arldition of funda − mental fealgibility st, u (lies , t . he effects

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... canlera angle offset , has been cvaluatcd . Thc results con 丘rmed its feasibilit , y and showc { l that our method is promising , Thc cxperilnents revealed a uniqlle propcrty that signatures 丘 gured in the air are hard to be imitated ・ key words signature verification , biometrics , personal authentication , mobile terminal ・ handwriting, gesture 59 N 工 工 一 Eleotronio Library