Title: Signal train verification system using landmarks

Abstract: When trains of signals, derived from a written template signature, are to be compared directly with trains of signals, derived from a written specimen signature, because no two written signatures are identical, there is a requirement for providing a certain degree of "rubberiness" between the specimen and template signals. Previously, such rubberiness was achieved by breaking up the trains of signals into fixed portions and then conducting translation, stretch and contraction between these fixed portions in the course of the comparison. In this invention, advantage is taken of the existence of prominent landmarks in the trains of signals of the template and specimen signatures. The trains of signals are broken into segments by these landmarks. Segments of the specimen are stretched or contracted and translated to match corresponding segments of the template, to greatly simplify and enhance correlation process.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Crane, Hewitt D. (Portola Valley, CA, US)
Wolf, Daniel E. (Menlo Park, CA, US)

Application Number: 898997
Filing Date: 1978-04-21
Publication_date: 1980-02-26
Assignee: Stanford Research Institute International (Menlo Park, CA)
Primary Class(es): 382/123 382/215
Other Classes:
US Patent Ref:

3699517	Oct, 1972	Dyche	340/146.
3930229	Dec, 1975	Crane et al.	340/146.
3962679	Jun, 1976	Engelbrecht	340/146.
4086567	Apr, 1978	Crane et al.	340/146.

Other Refs:
Primary Examiner: Thesz, Joseph M.
Assistant Examiner:
Attorney: Freilich, Hornbaker, Wasserman, Rosen & Fernandez