Optics: measuring and testing – Document pattern analysis or verification
Patent
1992-05-11
1994-06-28
Warden, Robert J.
Optics: measuring and testing
Document pattern analysis or verification
235380, 235468, 235494, 34082534, G06K 710, G06K 974, G06K 1906, G07D 700
Patent
active
053251679
ABSTRACT:
Record document may be authenticated against reference grain data obtained from the document at a prior time. The body of the document is formed by base medium bearing the record entries such as text within record site. Grain seal site is located at a predetermined location within the base medium. The unique grain structure within the seal site are microscopic and function as a seal for authenticating the document. The seal site is initially scanned to provide a stream of reference data generated by the surface reflection of the grain structure. This reference grain data is stored in memory for future authentication use. The seal site is then currently scanned to generate a stream of current grain data for comparison to the reference grain data.
REFERENCES:
patent: 4423415 (1983-12-01), Goldman
patent: 4547896 (1985-10-01), Ohtombe et al.
patent: 4675669 (1987-06-01), Goldman
Canon Research Center America, Inc.
Crawford L. M.
Hentzel Paul
Warden Robert J.
LandOfFree
Record document authentication by microscopic grain structure an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Record document authentication by microscopic grain structure an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Record document authentication by microscopic grain structure an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2380411