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Compression of multispectral images by three-dimensional SPIHT algorithm

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3 Author(s)
Dragotti, P.L. ; Dipt. di Ingegneria Elettronica, Naples Univ., Italy ; Poggi, G. ; Ragozini, A.R.P.

The authors carry out low bit-rate compression of multispectral images by means of the Said and Pearlman's SPIHT algorithm, suitably modified to take into account the interband dependencies. Two techniques are proposed: in the first, a three-dimensional (3D) transform is taken (wavelet in the spatial domain, Karhunen-Loeve in the spectral domain) and a simple 3D SPIHT is used; in the second, after taking a spatial wavelet transform, spectral vectors of pixels are vector quantized and a gain-driven SPIHT is used. Numerous experiments on two sample multispectral images show very good performance for both algorithms

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:38 ,  Issue: 1 )