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Hyperspectral Imagery Denoising Using a Spatial-Spectral Domain Mixing Prior
Authors:Shao-Lin Chen  Xi-Yuan Hu  Si-Long Peng
Affiliation:1. National ASIC Design and Engineering Center, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
Abstract:By introducing a novel spatial-spectral domain mixing prior, this paper establishes a Maximum a posteriori (MAP) framework for hyperspectral images (HSIs) denoising. The proposed mixing prior takes advantage of different properties of HSI in the spatial and spectral domain. Furthermore, we propose a spatially adaptive weighted prior combining smoothing prior and discontinuity-preserving prior in the spectral domain. The weights can be defined as a function of the spectral discontinuity measure (DM). For minimizing the objective function, a half-quadratic optimization algorithm is used. The experimental results illustrate that our proposed model can get a higher signal-to-noise ratio (SNR) than using only smoothing prior or discontinuity-preserving prior.
Keywords:hyperspectral image  mixing prior  spectral continuity  image denoising
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