Ambiente computacional para verificaÃÃo de assinaturas invariantes ao tamanho em tempo real / A computacinal enviroment for real time invariant sized signature verification

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

A great number of studies concerning on-line verification systems have been conducted by researchers in the last years. However, investigations on the influence of different signature sizes on the process of signature formation are little. In fact, this kind of analysis for on-line signature verification system is been made for the first time. In this dissertation, in order to investigate this influence, a database containing signatures of three different sizes was created. The experimental results show that signatures of different sizes are statistically different and they can influence the feature extraction techniques. Thus, a special attention has to be taken in the implementation of global applications that use databases with signatures of different sizes. In the experiments performed, in the best case, the medium signatures had an error mean of 1,96%, while the small and large signatures after a feature selection had an error mean of 4,04% and 4,25% respectively. Throughout a local feature selection it was possible to minimize the influence of the distortions caused by the signature size variations

ASSUNTO(S)

seleÃÃo de caracterÃsticas extraÃÃo de caracterÃsticas verificaÃÃo on-line de assinatura ciencia da computacao

ACESSO AO ARTIGO

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