8 May 2001 Noise removal and deformation elimination
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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.
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Olli P. Yli-Harja, Olli P. Yli-Harja, Heikki Huttunen, Heikki Huttunen, Sami Laakkonen, Sami Laakkonen, } "Noise removal and deformation elimination", Proc. SPIE 4304, Nonlinear Image Processing and Pattern Analysis XII, (8 May 2001); doi: 10.1117/12.424983; https://doi.org/10.1117/12.424983
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