A multiresolution approach to time warping achieved by a Bayesian prior-posterior transfer fitting strategy
Warping is an approach to the reduction and analysis of phase variability in functional observations, by applying a smooth bijection to the function argument. We propose a natural representation of warping functions in terms of a new type of elementary functions named 'warping component functions', or 'warplets', which are combined into the warping function by composition. The inverse warping function is trivial and explicit to obtain. A sequential Bayesian estimation strategy is introduced which fits a series of models and transfers the posterior of the previous fit into the prior of the next fit. Model selection is based on a warping analogue to wavelet thresholding, combined with Bayesian inference. Copyright (c) 2010 Royal Statistical Society.
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Volume (Year): 72 (2010)
Issue (Month): 5 ()
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