Image enhancement by nonlinear extrapolation in frequency space

Hayit Greenspan; Charles H. Anderson

doi:10.1117/12.171057

23 March 1994 Image enhancement by nonlinear extrapolation in frequency space

Hayit Greenspan, Charles H. Anderson

Proceedings Volume 2182, Image and Video Processing II; (1994) https://doi.org/10.1117/12.171057
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

Abstract

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.

Citation Download Citation

Hayit Greenspan and Charles H. Anderson "Image enhancement by nonlinear extrapolation in frequency space", Proc. SPIE 2182, Image and Video Processing II, (23 March 1994); https://doi.org/10.1117/12.171057

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