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:
May. 05, 1987
Filed:
May. 06, 1985
Hsien-Che Lee, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
In a method for processing digital color images derived from photographic film, the method employing color reproduction functions generated by normalizing random samples of color values from different colors, oversampling of color values from color saturated textures such as green grass and blue sky noise can distort the randomness of sampling and result in unwanted color shifts in the processed digital images. The problem is solved by constraining the shapes of and relationships between the color reproduction functions in conformance with a priori knowledge of the photographic film, and photographic conditions. According to one aspect of the invention, the shapes of the color reproduction functions are constrained in conformance with the D-Log H curves of a color photographic film. According to another aspect of the invention, the relationships between the color reproduction functions are constrained in conformance with the assumption that the illuminant employed to expose the film was a black body radiator.