منابع مشابه
Frequency and spatially adaptive wavelet packets
posed both spatially (S) and spectrally (F). The spatial decomposition is carried out using a quad-tree split. Since the spatial partitions do not overlap, this segmentation allows the four children nodes to be further analyzed independently. The frequency decomposition is performed using a four channel quadrature mirror filter (QMF) bank. This produces a library of wavelet packet bases which c...
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15 صفحه اولWavelet Basis Packets and Wavelet Frame Packets
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An approach is presented for conducting multiscale statistical process control (MSSPC), based on a library of basis functions provided by wavelet packets. The proposed approach explores the improved ability of wavelet packets in extracting features with arbitrary locations, and having different localizations in the time-frequency domain, in order to improve the detection performances achieved w...
متن کاملWavelet Packets for Time-frequency Analysis of Multispectral Imagery
Multispectral geospatial image sets retain the scene’s spatial and spectral information. To jointly use both of them for analysis purposes, we propose to extend the concept of wavelet packets, by introducing a new integrated multispectral entropy function. Each spectral band is individually decomposed by the wavelet packets transform, and then the entropy term is jointly guided by information f...
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ژورنال
عنوان ژورنال: Applied and Computational Harmonic Analysis
سال: 1994
ISSN: 1063-5203
DOI: 10.1006/acha.1994.1003