The locally stationary dual-tree complex wavelet model

Nelson, James and Gibberd, Alex and Nafornita, Corina and Kingsbury, Nick (2018) The locally stationary dual-tree complex wavelet model. Statistics and Computing, 28 (6). pp. 1139-1154. ISSN 0960-3174

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Abstract

We here harmonise two significant contributions to the field of wavelet analysis in the past two decades, namely the locally stationary wavelet process and the family of dual-tree complex wavelets. By combining these two components, we furnish a statistical model that can simultaneously access benefits from these two constructions. On the one hand, our model borrows the debiased spectrum and auto-covariance estimator from the locally stationary wavelet model. On the other hand, the enhanced directional selectivity is obtained from the dual-tree complex wavelets over the regular lattice. The resulting model allows for the description and identification of wavelet fields with significantly more directional fidelity than was previously possible. The corresponding estimation theory is established for the new model, and some stationarity detection experiments illustrate its practicality.

Item Type:
Journal Article
Journal or Publication Title:
Statistics and Computing
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1800/1804
Subjects:
ID Code:
128857
Deposited By:
Deposited On:
06 Nov 2018 14:44
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Sep 2020 04:37