New nonlinear combined spatial-frequency domain filtering for noise reduction and image enhancement

Igor N. Aizenberg; Naum N. Aizenberg; Taras Bregin

doi:10.1117/12.424977

8 May 2001 New nonlinear combined spatial-frequency domain filtering for noise reduction and image enhancement

Igor N. Aizenberg, Naum N. Aizenberg, Taras Bregin

Proceedings Volume 4304, Nonlinear Image Processing and Pattern Analysis XII; (2001) https://doi.org/10.1117/12.424977
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

A new approach to nonlinear filtering is considered in the paper. The key point of this approach is a combination of spatial and frequency domain filtering. The following filtering technique is proposed for noise reduction. On the first stage a noisy image has to be processed using some powerful nonlinear spatial-domain filter. Since the image will be smoothed after this operation, then its spectra has to be corrected. Taking into account that a major part of a noise is concentrated in the spectra amplitude, also as image smoothing involves a significant spectra amplitude distortion, a method for its correction is proposed. The same technique is also used for solving of the frequency correction (extraction of image details) problem.

Citation Download Citation

Igor N. Aizenberg, Naum N. Aizenberg, and Taras Bregin "New nonlinear combined spatial-frequency domain filtering for noise reduction and image enhancement", Proc. SPIE 4304, Nonlinear Image Processing and Pattern Analysis XII, (8 May 2001); https://doi.org/10.1117/12.424977

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