Signal-dependent noise modeling for adaptive multiresolution local-statistics filtering

Bruno Aiazzi; Luciano Alparone; Stefano Baronti

doi:10.1117/12.341087

5 March 1999 Signal-dependent noise modeling for adaptive multiresolution local-statistics filtering

Bruno Aiazzi, Luciano Alparone, Stefano Baronti

Proceedings Volume 3646, Nonlinear Image Processing X; (1999) https://doi.org/10.1117/12.341087
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

Abstract

In this paper, a class of signal-dependent noise models that are encountered in image processing applications is considered. Such models are uniquely defined by the gamma exponent, which rules the dependence on the signal, and by the variance of a zero-mean random noise process. An automatic procedure for measuring the model parameters directly from noisy images is presented. Then, adaptive filtering is applied in a multiresolution fashion, to take advantage of increasing SNR of the data, at decreasing resolution. A rational Laplacian pyramid is generalized to the noise model to yield signal-independent noise on its layers. Experiments show a high accuracy of results, both of noise estimation and of filtering.

Citation Download Citation

Bruno Aiazzi, Luciano Alparone, and Stefano Baronti "Signal-dependent noise modeling for adaptive multiresolution local-statistics filtering", Proc. SPIE 3646, Nonlinear Image Processing X, (5 March 1999); https://doi.org/10.1117/12.341087

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