Compression algorithm for hyperspectral imagery using the linear mixing model and wavelet transformation

Wei Chen; David Gillis; Jeffrey H. Bowles; Curtiss O. Davis

doi:10.1117/12.463646

30 January 2003 A Compression algorithm for hyperspectral imagery using the linear mixing model and wavelet transform

Wei Chen, David Gillis, Jeffrey H. Bowles, Curtiss O. Davis

Proceedings Volume 4793, Mathematics of Data/Image Coding, Compression, and Encryption V, with Applications; (2003) https://doi.org/10.1117/12.463646
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

A scheme for lossy hyperspectral data cube compression, using a linear mixing model approach and wavelet transform, is presented. The data is first compressed in the spectral dimension by using the linear mixing model approximation to reduce the number of dimensions needed to represent the data. The reduced data is then compressed along the spatial dimensions using a wavelet transform. Five hyperspectral data cubes have been tested using the algorithm. Compression ratios of up to 1000:1 are achieved with peak signal-to-noise (PSNR) ratios of over 40 dB. For all test cases, we were able to achieve ratios of over 200:1 with PSNR exceeding 46 dB. The ultra-high compression ratio with low distortion is an improvement over other results reported in the literature. In addition, the reconstructed spectra from the highly compressed file are shown to preserve the overall shape of the original spectra. However, in some cases the curves are slightly offset in some spectral regions from the original.

Citation Download Citation

Wei Chen, David Gillis, Jeffrey H. Bowles, and Curtiss O. Davis "A Compression algorithm for hyperspectral imagery using the linear mixing model and wavelet transform", Proc. SPIE 4793, Mathematics of Data/Image Coding, Compression, and Encryption V, with Applications, (30 January 2003); https://doi.org/10.1117/12.463646

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