What is disclosed is a method for determining a hue adjustment to an input hue, H.sub.in, to squeeze the input hue toward a region of preferred hue, H.sub.pref. The method involving defining a change in hue as: .DELTA.H=H.sub.in-H.sub.pref; defining a hue weight as a Gaussian: H.sub.weight=Gaussian(H.sub.pref,H.sub.sigma) wherein the Gaussian function can be alternatively replaced by one of either the sum of two Gaussians or a Gaussian convolved with a Rect function; defining an amount of hue adjustment as: H.sub.Adjust=.DELTA.H*H.sub.weight. Then, an output hue is generated by applying the adjustment such that: H.sub.out=H.sub.in-H.sub.Adjust.

 
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> Apparatus for sharpening an image using a luminance channel

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