Wavelet-based hyperspectral image coding using robust fixed-rate trellis-coded quantization

被引:12
|
作者
Abousleman, GP [1 ]
机构
[1] Motorola Inc, Space & Syst Technol Grp, Scottsdale, AZ 85252 USA
关键词
data compression; hyperspectral image compression; multispectral image coding;
D O I
10.1117/12.312610
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
A system is presented for compression of hyperspectral imagery. Specifically, DPCM is used for spectral decorrelation, while a robust 2-D discrete wavelet coding scheme is used for spatial decorrelation. Trellis-coded quantization is used to encode the wavelet coefficients. Side information and rate allocation strategies are discussed. Fixed-rate codebooks are designed using a modified version of the generalized Lloyd algorithm. This system achieves a compression ratio of greater than 70:1, with an average PSNR of the coded hyperspectral sequence exceeding 40 dB.
引用
收藏
页码:74 / 85
页数:12
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