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Proceedings Paper

Noise removal and deformation elimination
Author(s): Olli P. Yli-Harja; Heikki Huttunen; Sami Laakkonen
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Paper Abstract

In addition to suppressing noise, smoothers also cause an unwanted deformation of the image. In this paper we show how such deformation can be compensated. We consider the spectral behavior of noise removal by standard median filters. Observing the power spectrum, we notice that the deformation caused by median filter obeys the general form of the corresponding moving average filter, at least for i.i.d. input. We show that it is possible to cancel this deformation by using an approximation of the linear inverse filter, which can be easily implemented for images as well as 1D data.

Paper Details

Date Published: 8 May 2001
PDF: 10 pages
Proc. SPIE 4304, Nonlinear Image Processing and Pattern Analysis XII, (8 May 2001);
Show Author Affiliations
Olli P. Yli-Harja, Tampere Univ. of Technology (Finland)
Heikki Huttunen, Tampere Univ. of Technology (Finland)
Sami Laakkonen, Tampere Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 4304:
Nonlinear Image Processing and Pattern Analysis XII
Edward R. Dougherty; Jaakko T. Astola, Editor(s)

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