Reconstruction of Hyperspectral Imagery from Random Projections Using Multihypothesis Prediction

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Authors C. Chen, W. Li, E. W. Tramel, and J. E. Fowler
Journal/Conference Name IEEE Transactions on Geoscience and Remote Sensing
Paper Category
Paper Abstract Reconstruction of hyperspectral imagery from spectral random projections is considered. Specifically, multiple predictions drawn for a pixel vector of interest are made from spatially neighboring pixel vectors within an initial non-predicted reconstruction. A two-phase hypothesis-generation procedure based on partitioning and merging of spectral bands according to the correlation coefficients between bands is proposed to fine-tune the hypotheses. The resulting prediction is used to generate a residual in the projection domain. This residual being typically more compressible than the original pixel vector leads to improved reconstruction quality. To appropriately weight the hypothesis predictions, a distance-weighted Tikhonov regularization to an ill-posed least-squares optimization is proposed. Experimental results demonstrate that the proposed reconstruction significantly outperforms alternative strategies not employing multihypothesis prediction.
Date of publication 2014
Code Programming Language MATLAB
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