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- W2000510954 abstract "We address the issue of constructing directional wavelet bases. After considering orthonormal directional wavelets whose Fourier transforms are indicator functions, we give a construction of directional wavelets with fast decay that is based on an hexagonal filter bank tree. An implementation for squarely sampled images and numerical results are presented. Then we discuss the frequency localization of directional wavelet bases. We analyze the incompatibility between a proper localization and the nonredundancy constraint, and show that the nonpermissibility condition can be extended to general wavelet bases that are not necessarily generated by a filter bank tree. At last, we show that there exist directional wavelet tight frames that are well localized and have a redundancy factor arbitrarily close to 1." @default.
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- W2000510954 date "2009-01-01" @default.
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- W2000510954 title "On the Construction of Discrete Directional Wavelets: HDWT, Space-Frequency Localization, and Redundancy Factor" @default.
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- W2000510954 doi "https://doi.org/10.1137/070705696" @default.
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