Se p 20 04 A FAST DIRECTIONAL CONTINUOUS SPHERICAL WAVELET TRANSFORM
نویسندگان
چکیده
A fast algorithm for Antoine and Vandergheynst's (1998) directional Continuous Spherical Wavelet Transform (CSWT) is presented. Computational requirements are reduced by a factor of O(N pix), when N pix is the number of pixels on the sphere. The spherical Mexican Hat wavelet Gaussianity analysis of the WMAP 1-year data performed by Vielva et al. (2003) is reproduced and confirmed using the fast CSWT. The proposed extension to directional analysis is inherently afforded by the fast CSWT algorithm.
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