A Method of Writer Verification without Keyword Registration Using Feature Sequences extraction from On-line Handwrittern Sentences

The paper proposes a method of writer verification based on a spotting method called CDP (Continuous Dynamic Programming). The method has more advantageous aspects over conventional methods; 1) no keyword registration in advance except that a user writes a sentence-like sequential pattern of stroke, 2) accep tance of any segment of the above pattern as an input for writer verification. The used and evaluated features of sequence pattern are five kinds, that is, x, y, pressure, azimuth and altitude extracted from on-line writing sentences on a tablet. The paper shows several experiments to investigate those of performance of the method, the best selection of feature combination and determination of essential parameters to realize a verification system, which hits almost 100% correct rate of writer verification.