Journal
BIT NUMERICAL MATHEMATICS
Volume 48, Issue 1, Pages 5-27Publisher
SPRINGER
DOI: 10.1007/s10543-008-0162-3
Keywords
subdivision schemes; refinement equation; full rank schemes; interpolatory matrix refinable function; matrix spectral factorization
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We investigate full rank interpolatory vector subdivision schemes whose masks are positive definite on the unit circle except the point z=1. Such masks are known to give rise to convergent schemes with a cardinal limit function in the scalar case. In the full rank vector case, we show that there also exists a cardinal refinable function based on this mask, however, with respect to a different notion of refinability which nevertheless also leads to an iterative scheme for the computation of vector fields. Moreover, we show the existence of orthogonal scaling functions for multichannel wavelets and give a constructive method to obtain these scaling functions.
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