Spectral Ringing Artifacts in Hyperspectral Image Data Compression
نویسندگان
چکیده
When a three-dimensional wavelet decomposition is used for compression of hyperspectral images, spectral ringing artifacts can arise, manifesting themselves as systematic biases in some reconstructed spectral bands. More generally, systematic differences in signal level in different spectral bands can hurt compression effectiveness of spatially low-pass subbands. The mechanism by which this occurs is described in the context of ICER-3D, a hyperspectral imagery extension of the ICER image compressor. Methods of mitigating or eliminating the detrimental effects of systematic band-dependent signal levels are proposed and discussed, and results are presented.
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