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US 2002/0171661 A1Published application
Correction of digital images
AssigneeEastman Kodak Company
InventorRichard A. Sharman
Life of this patent
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Abstract
A method of processing digital images which gradually substitutes a processed and/or filtered version of the input data for the original data. The method is applied to shadow regions of a color digital image to remove residual dark area color casts.
Claims9
A method of manipulating color images in areas of shadow comprising the steps of
- generating a luminance version of the original color input data,
- determining a mean value of the input data,
- determining a chroma level,
- calculating an adaptive chrominance threshold, from a predetermined chrominance input threshold and the determined mean value, and
- replacing, in an output image, a proportion of the input data with the luminance version of the data, the proportion of the input data being replaced being determined from the adaptive chrominance threshold and the chroma level.
2 more elements
Dependencies are inferred from the claim text.