Journal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Volume 55, Issue 2, Pages 520-529Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2006.887148
Keywords
convolution; spheres; wavelet transforms
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We describe the construction of a spherical wavelet analysis through the inverse stereographic projection of the Euclidean planar, wavelet framework, introduced originally by Antoine and Vandergheynst and developed further by Wiaux et al Fast algorithms for performing the directional continuous wavelet analysis on the unit sphere are presented. The fast directional algorithm, based on the fast spherical convolution algorithm developed by Wandelt and Gorski, provides a savings of O(root N-pix) over a direct quadrature implementation for N-pix pixels on the sphere, and allows one to perform a directional spherical wavelet analysis of a 10(6) pixel map on a personal computer.
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