Method for verifying a handwritten signature entered into a digi

Details Method for verifying a handwritten signature entered into a digi Method for verifying a handwritten signature entered into a digi

1993-12-06

1995-07-18

Couso, Jose L.

Image analysis

Pattern recognition

On-line recognition of handwritten characters

382119, G06K 900

Patent

active

054349281

ABSTRACT:
A handwriting verification method which is less expensive to implement than previous methods, employs simpler algorithms than previous methods, and which requires fewer points than previous methods. The method includes the steps of determining a set of positional data points for a handwritten signature entered into the digitizer, determining a set of global variable values associated with the signature from the positional data points, determining head and tail strings having shape information for the signature, reading previously computed head and tail strings from a storage medium carried by the person, reading the verification information from the storage medium, determining a range of acceptance values for each global variable, and determining whether each of the global verification values lies within the range of acceptance. If at least one of the global verification values lies outside the range of acceptance, the method further includes the step of rejecting the subsequent signature as a forgery. If each of the global verification values lies within the range of acceptance, the method further includes the step of determining whether the head and tail strings of the subsequent signature equal the head and tail strings from the storage medium. If either of the head and tail strings of the subsequent signature are not equal to the head and tail strings from the storage medium, the method further includes the step of rejecting the subsequent signature as a forgery. Finally, if both the head and tail strings of the subsequent signature are equal to the head and tail strings from the storage medium, the method includes the step of accepting the signature as valid.

REFERENCES:
patent: 3111646 (1963-11-01), Harmon et al.
patent: 4040010 (1977-08-01), Crane et al.
patent: 4495644 (1985-01-01), Parks et al.
patent: 4680801 (1987-07-01), Etherington et al.
patent: 4736445 (1988-04-01), Gundersen
patent: 4751741 (1988-01-01), Mochinaga et al.
patent: 4817034 (1989-03-01), Hardin, Sr. et al.
patent: 4897880 (1990-01-01), Wilber et al.
patent: 4901358 (1990-02-01), Bechet
patent: 4933977 (1990-06-01), Ohnishi et al.
patent: 5040222 (1991-08-01), Muroya
patent: 5054088 (1991-10-01), Gunderson et al.
patent: 5109426 (1992-04-01), Parks
patent: 5113452 (1992-05-01), Chatani et al.
patent: 5327342 (1994-07-01), Roy

Affiliated with

Also associated with

Rating

Method for verifying a handwritten signature entered into a digi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for verifying a handwritten signature entered into a digi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for verifying a handwritten signature entered into a digi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2421700