Image enhancement by nonlinear extrapolation in frequency space

被引：113

作者：

Greenspan, H ^{[1
]}

Anderson, CH

Akber, S

机构：

[1] Tel Aviv Univ, Dept Biomed Engn, Fac Engn, IL-69978 Tel Aviv, Israel

[2] Washington Univ, Sch Med, Dept Anat & Neurobiol, St Louis, MO 63110 USA

[3] Univ Calif Berkeley, Dept Geophys, Berkeley, CA 94720 USA

来源：

IEEE TRANSACTIONS ON IMAGE PROCESSING | 2000年 / 9卷 / 06期

基金：

美国国家航空航天局;

关键词：

HDTV; image enhancement; Laplacian pyramid; multiresolution representation; scale space;

D O I：

10.1109/83.846246

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

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).

引用

页码：1035 / 1048

页数：14

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