Signature Verification by FIR Filter

概要

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This paper discusses on a signature verification method using the finite impulse response (FIR) filter characterizing velocity in writing a signature. The impulse response of FIR filter can be determined as follows : (1) The discrete cosine transforms of the autocorrelation function of the handwriting velocities in the horizontal and vertical directions are respectively regarded as the input and output sequences of the FIR filter. (2) The impulse response of the FIR filter is determined in the least square sense from the input and output sequences. The resulting impulse response can fully describe the dynamics, i.e., the velocity, of handwriting. Signature verification experiments on a data base of four hundred KANJI signatures from twenty-four individuals are attempted. Type I error rates were found to be 2-14% while Type II error rates were 0-8%.
東海大学の論文