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Adaptive Edge Preserving Maps in Markov Random Fields for Hyperspectral Image Classification | IEEE Journals & Magazine | IEEE Xplore

Adaptive Edge Preserving Maps in Markov Random Fields for Hyperspectral Image Classification


Abstract:

This article presents a novel adaptive edge preserving (aEP) scheme in Markov random fields (MRFs) for hyperspectral image (HSI) classification. MRF regularization usuall...Show More

Abstract:

This article presents a novel adaptive edge preserving (aEP) scheme in Markov random fields (MRFs) for hyperspectral image (HSI) classification. MRF regularization usually suffered from over-smoothing at boundaries and insufficient refinement within class objects. This work divides and conquers this problem class-by-class, and integrates {K} ( {K} -1 )/2 ( {K} is the class number) aEP maps (aEPMs) in MRF model. Spatial label dependence measure (SLDM) is designed to estimate the interpixel label dependence for given spectral similarity measure. For each class pair, aEPM is optimized by maximizing the difference between intraclass and interclass SLDM. Then, aEPMs are integrated with multilevel logistic (MLL) model to regularize the raw pixelwise labeling obtained by spectral and spectral–spatial methods, respectively. The graph-cuts-based \alpha ~\beta -swap algorithm is modified to optimize the designed energy function. Moreover, to evaluate the final refined results at edges and small details thoroughly, segmentation evaluation metrics are introduced. Experiments conducted on real HSI data denote the superiority of aEPMs in evaluation metrics and region consistency, especially in detail preservation.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 59, Issue: 10, October 2021)
Page(s): 8568 - 8583
Date of Publication: 13 November 2020

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