7The role of dip angle information in force-based signature verification

The problem that whether the introduction of the dip angle information of a digital pen for signature verification into the force-based signature verification can effectively eliminate the restriction that ordinary digital pens require the writer to hold them in a fixed posture during handwriting and affect the performance of the recognition system was investigated. The method of force transmission was used to combine the inclination sensor information with the force sensor information to realize multi-sensor information fusion. The experiments were conducted to compare the recognition capability of force signals with or without incorporating dip angle information. The results showed that dip angle information had little impact on the recognition rate when the digital pens were in a fixed posture. On the other hand, it played an important role when a pen was at a free posture. The combined information of a inclination sensor and a force sensor can improve the recognition performance of the system remarkably.