Image enhancement by nonlinear extrapolation in frequency space

Hayit Greenspan; Charles H. Anderson; Sofia Akber

doi:10.1109/83.846246

Image enhancement by nonlinear extrapolation in frequency space

Hayit Greenspan, Charles H. Anderson, Sofia Akber

Department of Bio-Medical Engineering

Research output: Contribution to journal › Article › peer-review

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 east of implementation allow for real-time applications such as high-definition television (HDTV).

Original language	English
Pages (from-to)	1035-1048
Number of pages	14
Journal	IEEE Transactions on Image Processing
Volume	9
Issue number	6
DOIs	https://doi.org/10.1109/83.846246
State	Published - 2000

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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 east of implementation allow for real-time applications such as high-definition television (HDTV).",

author = "Hayit Greenspan and Anderson, {Charles H.} and Sofia Akber",

note = "Funding Information: Manuscript received August 20, 1997; revised June 17, 1999. This work was supported in part by an Intel research grant. The early part of this work was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Henri Maitre.",

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Image enhancement by nonlinear extrapolation in frequency space

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