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Zero-crossings of a wavelet transform

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1 Author(s)
Mallat, S. ; Courant Inst. of Math. Sci., New York Univ., NY, USA

The completeness, stability, and application to pattern recognition of a multiscale representation based on zero-crossings is discussed. An alternative projection algorithm is described that reconstructs a signal from a zero-crossing representation, which is stabilized by keeping the value of the wavelet transform integral between each pair of consecutive zero-crossings. The reconstruction algorithm has a fast convergence and each iteration requires O( N log2 (N)) computation for a signal of N samples. The zero-crossings of a wavelet transform define a representation which is particularly well adapted for solving pattern recognition problems. As an example, the implementation and results of a coarse-to-fine stereo-matching algorithm are described

Published in:

Information Theory, IEEE Transactions on  (Volume:37 ,  Issue: 4 )

Date of Publication:

Jul 1991

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