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:
Jul. 10, 1990
Filed:
Jul. 15, 1988
Terrence H Joyce, Minneapolis, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A system and method of modifying pixels supplied to the system that a multiple level signals for a digitized image wherein a moving pixel window with a center pixel, D.sub.c, is used from which the annular means, m.sub.a, of the center pixel (the mean of the 2.sup.N pixel values of the window surrounding the center pixel, where N is an integer of 1 or more) is determined with the center pixel and selected pixels surrounding the center pixel, D.sub.c, are used to determine a measure of deviation (center deviation, .sigma..sub.c) of the center pixel relative to the center pixel that is used to obtain a modification gain, f(.sigma..sub.c,C.sub.g). The center pixel, D.sub.c, its annular mean, m.sub.a, and its modification gain, f(.sigma..sub.c,C.sub.g) or F'(.sigma..sub.c,C.sub.g) are used to obtain a modified center pixel value, D.sub.c 40 , in accordance with one of the following equations that are of the form for an algorithm for determining the unsharp marking filter value for an image pixel: