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SURE-FAST BILATERAL FILTERS

Kishan, Harini and Seelamantula, Chandra Sekhar (2012) SURE-FAST BILATERAL FILTERS. In: IEEE International Conference on Acoustics, Speech and Signal Processing, , MAR 25-30, 2012, Kyoto, JAPAN, , pp. 1129-1132.

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Official URL: http://dx.doi.org/10.1109/ICASSP.2012.6288085

Abstract

Edge-preserving smoothing is widely used in image processing and bilateral filtering is one way to achieve it. Bilateral filter is a nonlinear combination of domain and range filters. Implementing the classical bilateral filter is computationally intensive, owing to the nonlinearity of the range filter. In the standard form, the domain and range filters are Gaussian functions and the performance depends on the choice of the filter parameters. Recently, a constant time implementation of the bilateral filter has been proposed based on raisedcosine approximation to the Gaussian to facilitate fast implementation of the bilateral filter. We address the problem of determining the optimal parameters for raised-cosine-based constant time implementation of the bilateral filter. To determine the optimal parameters, we propose the use of Stein's unbiased risk estimator (SURE). The fast bilateral filter accelerates the search for optimal parameters by faster optimization of the SURE cost. Experimental results show that the SURE-optimal raised-cosine-based bilateral filter has nearly the same performance as the SURE-optimal standard Gaussian bilateral filter and the Oracle mean squared error (MSE)-based optimal bilateral filter.

Item Type: Conference Paper
Additional Information: Copyright for this article belongs to IEEE, NEW YORK
Keywords: SURE;Bilateral filter;Raised-cosine approximation
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Depositing User: Francis Jayakanth
Date Deposited: 12 Feb 2013 11:01
Last Modified: 12 Feb 2013 11:01
URI: http://eprints.iisc.ac.in/id/eprint/45807

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