[54] AUTOMATED SIGNATURE VERIFICATION SYSTEM
[75] Inventor: Ping-Chien Chuang, Irving, Tex.
[73] Assignee: Recognition Equipment
Incorporated, Dallas, Tex.
[22] Filed: June 4, 1976
[21] Appl. No.: 692,768
[52] U.S. CI 340/146.3 SY
[51] IntCL2 G06K9/00
[58] Field of Search 340/146.3 SY, 146.3 SG,
340/146.3 R
[56] References Cited
UNITED STATES PATENTS
3,111,646 11/1963 Harmon 340/146.3 SG
3,133,266 5/1964 Frishkopf 340/146.3 SG
3,699,517 10/1972 Dyche 340/146.3 SY
Primary Examiner—Leo H. Boudreau
Attorney, Agent, or Firm—John E. Vandigriff
[57] ABSTRACT
Signature verification where an image mosaic for a signature to be verified is stored in a memory and wherein a prototype feature set for said signature is stored in memory. Binary signals representative of the location and magnitude of positive and negative peaks in mosaic and the stroke character in the region of each of said peaks are generated. A two-dimensional feature set patterned after the prototype set is stored with the signals ordered in dependence upon the occurrence of the peaks in the signature and accompanied by (i) peak rank in terms of peak magnitude and (ii) stroke character in the vicinity of each peak. The feature vector set is then compared with the prototype vector set and identity is signaled when within predetermined limits the feature set matches the prototype set.
16 Claims, 14 Drawing Figures
