title: A Simplified Derivation of Frei's Histogram Hyperbolization for Image Enhancement.
abstract: Frei has recently introduced a new technique (histogram hyperbolization) for image enhancement by the manipulation of the picture brightness levels. An alternative derivation of Frei's result, both simpler and more general, is presented.
authors.affiliation: Department of Electrical and Computer Engineering, University of New Hampshire, Durham, NH 03824.
authors.forename: P J
authors.initials: PJ
authors.lastname: Nahin