1. A method of enhancing a digital image comprising: obtaining the digital image; decomposing the provided digital image according to a plurality of a number N frequency bands, including a low frequency band and more than one different higher frequency bands; forming modified image data by applying a gain function to image data for one or more of the N frequency bands according to a setting of a number M control points, wherein M is less than N; and summing the modified image data for the N frequency bands to form a reconstructed digital image.