A maximum a posteriori approach of hyperanalytic wavelet based image denoising in a multi-wavelet context

Authors:
Ioana Firoiu;Alexandru Isar;Dorina Isar
Affiliations:
Electronics and Communications Faculty, "Politehnica" University, Timisoara, Romania;Electronics and Communications Faculty, "Politehnica" University, Timisoara, Romania;Electronics and Communications Faculty, "Politehnica" University, Timisoara, Romania
Venue:
SIP'10 Proceedings of the 9th WSEAS international conference on Signal processing
Year:
2010

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Abstract

In this paper we propose the use of a new implementation of the hyperanalytic wavelet transform, (HWT), in association with a Maximum a Posteriori (MAP) filter named bishrink. Such a denoising method is sensitive to the selection of the mother wavelets used for the computation of the HWT. Taking into account the drawbacks of the bishrink filter and the sensibility with the selection of the mother wavelets we propose a denoising method in two stages in a multi-wavelet context. Some simulation examples and comparisons prove the performances of the proposed denoising method.