1. Apparatus for enhancing the appearance of details in an image having a frequency spectrum, comprising: a separator for separating at least one part of the frequency spectrum of the image from a remaining part of the image; an amplitude-changing element for changing the amplitude of said at least one separated part of the frequency spectrum of the image; a combiner for combining said changed part of the frequency spectrum of the image with the remaining part of the image, and a controller responsive to the content of the image for controlling at least one of: (a) the separator, and (b) the amplitude-changing element to vary the part of the frequency spectrum separated from the remaining part of the image and the amount of the change in amplitude the one separated part prior to said combining, respectively.