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:
Aug. 17, 1993
Filed:
Aug. 08, 1991
Kenneth A Cox, Midlothian, VA (US);
Henry M Dante, Midlothian, VA (US);
Robert J Maher, Midlothian, VA (US);
Philip Morris Incorporated, New York, NY (US);
Abstract
Images such as product images are identified as substantially similar to one or more reference images by finding pixels which have substantially the same value or values in all or substantially all of the reference images. Image erosion and/or dilation may be used in processing the reference image data to help identify pixels which can always be expected to have the same value in all acceptable images. The values associated with the corresponding pixels in a product image are combined and compared to an expected value, and the dot product between the product image and the discriminant function is equal to a predetermined value. The values associated with pixels which correspond to regions not similar in substantially all of the reference images are combined to produce a discriminant function.