19.2 Hyperspectral Information Compression Systems

In this section, we investigate hyperspectral information compression systems, which implement exploitation-based criteria to compress hyperspectral imagery while preserving information for data processing. In particular, we develop two types of hyperspectral exploitation-based compression systems depicted in Figure 19.2(a) and (b) and Figure 19.3 where the compression takes place in different stages sequentially.

Figure 19.2 Spectral/spatial hyperspectral compression systems with 3D compression followed by exploitation-based application.

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Figure 19.3 Spectral/spatial hyperspectral compression systems with exploitation-based application followed by 3D compression.

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While both systems perform dimensionality reduction by transforms (DRT) and dimensionality reduction by band selection (DRBS) in their first stage to reduce spectral dimensionality, exploitation-based application compression and 3D compression implemented in the second and subsequent stages of both systems are actually reversed. In the systems in Figure 19.2(a) and (b) a 3D compression is carried out in middle stage (second stage in Figure 19.2(a) and second and third stages in Figure 19.2(b)) prior to an exploitation-based application in the last stage (third stage in ...

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