Compression of multispectral images by three-dimensional SPIHT algorithm

被引：195
作者：
Dragotti, PL [1 ]
Poggi, C [1 ]
Ragozini, ARP [1 ]
机构：
[1] Univ Naples Federico II, Dipartimento Ingn Elettron & Telecommun, I-80125 Naples, Italy
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2000年 / 38卷 / 01期
关键词：
compression; multispectral images; remote sensing; transform coding;
D O I：
10.1109/36.823937
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
We 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 dependences. Tw techniques are proposed: in the first, a three-dimensional (3-D) transform is taken (wavelet in the spatial domain, Karhunen-Loeve in the spectral domain) and a simple 3-D 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.
引用
收藏
页码：416 / 428
页数：13
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