Geodesic
Properties of Discrete Framelet Transforms
Bin Han1
1 Department of Mathematical and Statistical Sciences, University of Alberta Edmonton, Alberta T6G 2G1, Canada
Mathematical modelling of natural phenomena, Tome 8 (2013) no. 1, pp. 18-47.

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As one of the major directions in applied and computational harmonic analysis, the classical theory of wavelets and framelets has been extensively investigated in the function setting, in particular, in the function space L2(ℝd). A discrete wavelet transform is often regarded as a byproduct in wavelet analysis by decomposing and reconstructing functions in L2(ℝd) via nested subspaces of L2(ℝd) in a multiresolution analysis. However, since the input/output data and all filters in a discrete wavelet transform are of discrete nature, to understand better the performance of wavelets and framelets in applications, it is more natural and fundamental to directly study a discrete framelet/wavelet transform and its key properties. The main topic of this paper is to study various properties of a discrete framelet transform purely in the discrete/digital setting without involving the function space L2(ℝd). We shall develop a comprehensive theory of discrete framelets and wavelets using an algorithmic approach by directly studying a discrete framelet transform. The connections between our algorithmic approach and the classical theory of wavelets and framelets in the function setting will be addressed. Using tensor product of univariate complex-valued tight framelets, we shall also present an example of directional tight framelets in this paper.
DOI : 10.1051/mmnp/20138102

Bin Han 1

1 Department of Mathematical and Statistical Sciences, University of Alberta Edmonton, Alberta T6G 2G1, Canada 
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Bin Han. Properties of Discrete Framelet Transforms. Mathematical modelling of natural phenomena, Tome 8 (2013) no. 1, pp. 18-47. doi : 10.1051/mmnp/20138102. http://geodesic.mathdoc.fr/articles/10.1051/mmnp/20138102/

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