Writer verification using altitude and direction of pen movement

Signature is widely used to authorize who issued the document. However, signature has ambiguity, and it is difficult to distinguish the authentic signature from the mimicked signature by using bit mapped patterns only. On the other hand, altitude and direction of the gripped pen under signing depends on the shape of writer´s hand and the habit of writing. In this paper, we propose a new online writer verification method which uses the pen movement in signing. From the experimental results with 24 writers, a verification rate of 100% was obtained