Method for compensating image color when adjusting the contrast of a digital color image
AssigneeEastman Kodak Company
InventorsAndrew C. Gallagher, Edward B. Gindele
Life of this patent
Estimating the term…
Abstract
A method of adjustment of the color saturation characteristics of a digital color image is performed in order to compensate for an applied luminance tone scale function. This method comprises of the steps of receiving a tone scale function, calculating a local slope of the tone scale function for each pixel of the digital color image, calculating a color saturation signal from the digital color image, and adjusting the color saturation signal of the digital color image for each of the pixels based on the calculated local slope.
Claims12
A method for processing a digital color image having a plurality of pixels, the method comprising the steps of:
- (a) receiving a tone scale function;
- (b) calculating a local slope of the tone scale function for each pixel of the digital color image based on a ratio calculation evaluated for each pixel;
- (c) calculating a color saturation signal from the digital color image, and
- (d) adjusting the color saturation signal of the digital color image for each of the pixels based on the calculated local slope.
Dependencies are inferred from the claim text.