Image enhancement by non-linear extrapolation in frequency space

H. Greenspan, C. H. Anderson

Research output: Contribution to journalConference articlepeer-review


A procedure for creating images with higher resolution than the sampling rate would allow is described. The enhancement algorithm augments the frequency content of the image using shape-invariant properties of edges across scale by using a non-linearity that generates phase-coherent higher harmonics. The procedure utilizes 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).

Original languageEnglish
Pages (from-to)2-13
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 23 Mar 1994
Externally publishedYes
EventImage and Video Processing II 1994 - San Jose, United States
Duration: 6 Feb 199410 Feb 1994


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