The signature verification commonly utilize the Hidden Markov Models. What are the essential elements in identifying critical features uniquely defining a signature.
Papers:
Madasu Vamsi K, Lovell Brian C, Kubik Kurt. Automatic handwritten signature verification system for Australian passports. In: Science, engineering and technology summit on counter-terrorism technology, Canberra, 14 July, 2005. p. 5366.
Ong Thian Song, Khoh WH, Teoh A. Dynamic handwritten signature verification based on statistical quantization mechanism. In: International conference on computer engineering and technology (ICCET08), Singapore, 2009, vol. 2; 2009. p. 3126.