Facsimile and static presentation processing – Natural color facsimile – Color correction
Reexamination Certificate
2003-06-07
2008-10-28
Ahmed, Samir A (Department: 2624)
Facsimile and static presentation processing
Natural color facsimile
Color correction
C382S162000, C382S164000, C382S167000, C382S254000, C382S260000
Reexamination Certificate
active
07443552
ABSTRACT:
The process of the invention enables the spatial color alterations of a silver image to be taken into account according to one of its main axes (19). The process of the invention enables the altered or faded colors of the silver image to be restored automatically, without depending on the skills of an operator to perform a color restoration treatment. A digital image (12) is divided into adjacent pixel strips (18), arranged perpendicular to the direction (19) according to which the color alteration occurs. For each of these strips (18), optical density distributions of each pixel are calculated and compared with reference optical density values. The process of the invention enables the automatic correction of all the strips (18) comprising the altered pixels, by applying a linear transformation enabling the transformation of the optical density values of the altered pixels, into the optical density values of a pixel strip of least degradation. The process of the present invention is used in the technological field of the restoration of color photographic images.
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Geschwind R, “Restoration of Faded Colour Photographs by Digital Image Processing”, Journal of Photographic Science, Royal Photographic Society, London, GB, vol. 38, No. 4/5, 1990, pp. 193-196, XP000159933; ISSN: 0022-3638.
Dupont Jean-Fabien
Risson Valery J.
Ahmed Samir A
Eastman Kodak Company
Novais David A.
Vanchy, Jr. Michael
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