A novel offline signature modeling is introduced
and evaluated which attempts to advance a grid based feature
extraction method uniting it with the use of an ordered
powerset. Specifically, this work represents the pixel
distribution of the signature trace by modeling specific
predetermined paths having Chebyshev distance of two, as
being members of alphabet subsets-events. In addition, it is
proposed here that these events, partitioned in groups, are
further explored and processed within an ordered set context.
As a proof of concept, this study progresses by counting the
events’ first order appearance (in respect to inclusion) at a
specific powerset, along with their corresponding distribution.
These are considered to be the features which will be employed
in a signature verification problem. The verification strategy
relies on a support vector machine based classifier and the
equal error rate figure. Using the new scheme verification
results were derived for both the GPDS300 and a proprietary
data set, while the proposed technique proved quite efficient in
the handling of skilled forgeries as well.