Giuseppe Schirripa Spagnolo et al 2004 J. Opt. A: Pure Appl. Opt. 6 869 doi:10.1088/1464-4258/6/9/009
Giuseppe Schirripa Spagnolo, Carla Simonetti and Lorenzo Cozzella
Show affiliationsFor legal purposes there is a requirement for the validation of signatures and handwritten documents. A helpful method in this respect is the so-called superposed strokes analysis, based on the observation of some characteristics in the writing, such as some letters and their dynamics.
This paper introduces a promising new technique for superposed strokes analysis based on conoscopic holography. Through a non-contact 3D measure a 3D profile is created of the superposed strokes that allows the writing dynamics to be determined, such as, for example, if a stroke was drawn clockwise or counterclockwise.
We propose a 3D analysis by an opto-electronic system, in order to improve the graphology analysis for off-line signature verification.
42.40.Kw Holographic interferometry; other holographic techniques
06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
Issue 9 (September 2004)
Received 5 January 2004, accepted for publication 27 July 2004
Published 10 August 2004
Giuseppe Schirripa Spagnolo et al 2004 J. Opt. A: Pure Appl. Opt. 6 869
Ning Shao et al 2007 Nanotechnology 18 315101