Patent ID: 6441869
Filing Date: 2002-08-27
Classification: H04N

Abstract:
A method of adjusting a hue angle of at least one known color in an image, the method comprising:selecting a color in the image to be adjusted; defining a two-dimensional window of hues that surrounds the selected color wherein one axis of the window is the hue angle before adjustment and a perpendicular axis of the window is the hue angle after adjustment; determining a set of colors within the window around the selected color to be adjusted, the set of colors including the selected color and hue angles of a set of colors extending overt a range that is less than 360Â°; adjusting the hue angles of a determined set of colors, including the selected color, within the window, adjusting the hue angles directly adjacent to the selected color to a greater extent than the hue angles less directly adjacent the selected color to achieve a smooth transition between the adjusted hue angles and the unadjusted hue angles outside the window; and determining if the adjusted hue angle of at least the selected color is acceptable.