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. 26, 2008
Filed:
Dec. 25, 2003
Yoko Komori, Kanagawa, JP;
Yoko Komori, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention relates to an apparatus, a method, and a program for processing images that can reproduce images in which color tones are preserved even when a luminance signal level is changed by gradation conversion. A Y-matrix unitand a C-matrix unitconvert an original color obtained from image-sensing devicesto luminance signals and color-difference signals. A gradation-correction unitperforms gradation adjustment on luminance signals Y and convert them to luminance signals Y' to be output. The gradation-correction unitfurther converts the luminance signals Y′ to signals Y′, which are Y signals according to the XYZ color system, and outputs them to a color-difference correction unit. The color-difference correction unitcalculates values hand hcorresponding to hue H and chroma C according to the Munsell color system, and calculates X′ and Z′ according to the XYZ color system after gradation correction so as to preserve the hue H and the chroma C, based on the signals Y′, which are Y signals according to the XYZ color system after the gradation adjustment. The present invention can be applied to products for performing digital image processing.