9 June 2016 Spectral decorrelation of hyperspectral imagery using fractional wavelet transform
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Abstract
Hyperspectral data is composed of a set of correlated band images. In order to efficiently compress the hyperspectral imagery, this inherent correlation may be exploited by means of spectral decorrelators. In this paper, a fractional wavelet transform based method is introduced for spectral decorrelation of hyperspectral data. As opposed to regular wavelet transform which decomposes a given signal into two equal-length sub-signals, fractional wavelet transform is carried out by decomposing the signal corresponding to the spectral content into two sub-signals with different lengths. Sub-signal lengths are adapted to data to achieve a better spectral decorrelation. Performance results pertaining to AVIRIS datasets are presented in comparison with existing regular wavelet decomposition based compression methods.
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B. Uğur Töreyin, B. Uğur Töreyin, } "Spectral decorrelation of hyperspectral imagery using fractional wavelet transform", Proc. SPIE 9874, Remotely Sensed Data Compression, Communications, and Processing XII, 98740B (9 June 2016); doi: 10.1117/12.2224579; https://doi.org/10.1117/12.2224579
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