title: Image enhancement by nonlinear extrapolation in frequency space.
abstract: A technique for enhancing the perceptual sharpness of an image is described. The enhancement algorithm augments the frequency content of the image using shape-invariant properties of edges across scale by using a nonlinearity that generates phase coherent higher harmonics. The procedure utilizes the Laplacian transform and the Laplacian pyramid image representation. Results are presented depicting the power-spectra augmentation and the visual enhancement of several images. Simplicity of computations and ease of implementation allow for real-time applications such as high-definition television (HDTV).
authors.affiliation: Fac. of Eng., Tel Aviv Univ., Israel. hayit@eng.tau.ac.il
authors.forename: H
authors.initials: H
authors.lastname: Greenspan
authors.forename: C H
authors.initials: CH
authors.lastname: Anderson
authors.forename: S
authors.initials: S
authors.lastname: Akber