Method for chromatic adaptation of images

Details Method for chromatic adaptation of images Method for chromatic adaptation of images

2011-05-17

2011-05-17

Do, Anh Hong (Department: 2624)

Image analysis

Color image processing

Color correction

C382S162000, C382S166000

Reexamination Certificate

active

07945094

ABSTRACT:
A method for a chromatic adaptation transformation of images using temperature and tint space comprises the steps of: acquiring a red, green, blue (RGB) image using a camera (11); providing neutral RGB values for camera specific, and at least one of a selected highlight and shadow values, to produce a 3D lookup transformation table (21); calibrating the RGB image by applying the 3D lookup transformation table to produce a calibrated RGB image (22); calculating a Von Kries transform from specific temperature and tint values (14); and applying a chromatic adaptation to the calibrated RGB image using the Von Kries transform to produce a modified RGB image chromatically adapted (15), while maintaining neutral RGB values for highlight and shadow regions.

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Wyszecki et al.; Color Science, Concepts and Methods, Quantitative Data and Formulae; 2nd Edition, pp. 224-228.
Ian Lyons: “Pictographics inCamera Professional 3”, Internet Citation, [Online] XP002278169 Reviewed from the Internet: URL:www.computer-darkroom.com/incamera/incamera.htmand.../incamera—2.htm> [retrieved on Apr. 27, 2004] the whole document.

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