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:
Nov. 28, 2000
Filed:
Nov. 13, 1996
Applicant:
Inventors:
James Warnick, Pittsford, NY (US);
Chris W Honsinger, Webster, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382279 ; 382199 ; 382266 ; 382269 ; 382278 ;
Abstract
A digital image processing method for detecting when and where an image has been altered or modified includes the steps of generating an edge map of an original digital image; convolving the edge map with a carrier signal to generate a dispersed edge map; and combining the dispersed edge map with the original digital image to create a combined image. The combined digital image is checked to determine if it has been modified by correlating the carrier signal with the combined image to produce a recovered edge map; and comparing the recovered edge map with the original image to detect modifications to the combined image.