Study on obtaining method of original signal of on-line Chinese signature

Original signature through writing pad and other input devices may lead to noise and other unnecessary information, in order to minimize error, treatment of smoothing and noise reduction is needed. In this paper, corresponding algorithm for noise reduction is proposed. In order to make treated data signal adapt to circuit convolution operation in shift between spline wavelet and dyadic wavelet, curve fitting is made for every stroke so that every stroke become a periodic function, which lay a good foundation for further identification of Chinese signature and design of classifier.