The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 1993
Filed:
Oct. 25, 1991
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for automatically verifying a signature of an individual is described. The apparatus digitizes an image of the signature and provides a grey scale representation of each pixel. Next, the apparatus determines parameters of this digitized image and compares them to corresponding reference parameter values which were determined from a valid signature. The results of the comparison indicate if the signature to be verified is valid. The parameters include a center of gravity of the pixels within each row and columns of the digitized image, a center of gravity line for the centers of gravity for the rows or columns and the center of gravity for all pixels of the image. Other parameters include the positions of maximum grey scale pixels within each row or column, sums of grey scale values per column or row and the shape of a bow within the signature image.