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:
Apr. 06, 2004
Filed:
Feb. 02, 2000
Hsien-Che Lee, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method for generating an image-dependent tone scale curve includes (a) computing an image activity histogram for an input image value as a function of the number of neighboring pixels that have a predetermined amount of image modulation exclusive of a predetermined noise modulation; and (b) constructing an image-dependent tone scale curve from the image activity histogram. The predetermined amount of image modulation may comprise any image value within two specified intervals each bounded by a noise threshold and a modulation threshold. In another aspect, a tone scale curve that optimizes the rendering of image activity is generated under one or more constraints. More particularly, one or more slope-limit constraints and/or point constraints are established and then a tone scale function is constructed by applying the slope-limit constraints in a tone scale derivative space. An image activity histogram is computed and applied to the tone scale slopefunction. Finally, the tone scale slope function is integrated to generate the tone scale curve.