Title: APPENDIX 3: DETAILS OF THE HIDDEN MARKOV MODEL

Appendix 3: Details of the Hidden Markov Model

Signatures are described with the directional normalised angle along with the trajectory of the signature, as derived from the modified algorithm: 

with n being the ratio between the signature number of samples and the normalised one number of points, θ the absolute angle of the first segment, (x, y) the normalised acquired points with . The topology of the Hidden Markov Models used was the 6-state L-R (left-right).