Progressive Coding for Hyperspectral Signature Characterization
MARYLAND UNIV BALTIMORE DEPT OF COMPUTER SCIENCE AND ELECTRICAL ENGINEERING
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Spectral signature coding is an effective means of characterizing spectral features. This paper develops a rather different encoding concept, called progressive signature coding PSC which encodes a signature in a hierarchical manner. More specifically, it progressively encodes a spectral signature in multiple stages, each of these stages captures disjoint spectral information contained in the spectral signature. As a result of such a progressive coding, a spectral profile of progressive changes in a spectral signature can be generated for spectral characterization. The proposed idea is very simple and evolved from the Pulse Code Modulation PCM commonly used in communications and signal processing. It expands PCM to multi-stage PCM MPCM in the sense that a signature can be decomposed and quantized by PCM progressively in multiple stages for spectral characterization. In doing so, the MPCM generates a priority code for a spectral signature so that its spectral information captured in different stages can be prioritized in accordance with significance of changes in spectral variation. Such MPCM-based progressive spectral signature coding MPCM-PSSC can be useful in applications such as hyperspectral data exploitation, environmental monitoring, chemicalbiological agent detection. Experiments are provided to demonstrate the utility of the MPCM-PSSC in signature discrimination and identification.
- Radiofrequency Wave Propagation