Journal ArticleDOI
Semisupervised Band Clustering for Dimensionality Reduction of Hyperspectral Imagery
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TLDR
The experimental results show that the proposed semisupervised band clustering algorithm can outperform other existing methods with lower computational cost.Abstract:
Band clustering is applied to dimensionality reduction of hyperspectral imagery. Different from unsupervised clustering using all the pixels or supervised clustering requiring labeled pixels, the proposed semisupervised band clustering needs class spectral signatures only. After clustering, a cluster selection step is applied to select clusters to be used in the following data analysis. Initial conditions and distance metrics are also investigated to improve the clustering performance. The experimental results show that the proposed algorithm can outperform other existing methods with lower computational cost.read more
Citations
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Journal ArticleDOI
Hyperspectral Band Selection: A Review
Weiwei Sun,Qian Du +1 more
TL;DR: Current hyperspectral band selection methods are reviewed, which can be classified into six main categories: ranking based, searching based, clustering based, sparsity based, embedding-learning based, embedded learning based, and hybrid-scheme based.
Journal ArticleDOI
Hyperspectral Band Selection by Multitask Sparsity Pursuit
Yuan Yuan,Guokang Zhu,Qi Wang +2 more
TL;DR: This paper focuses on groupwise band selection and proposes a new framework, including the following contributions: a smart yet intrinsic descriptor for efficient band representation; an evolutionary strategy to handle the high computational burden associated with groupwise-selection-based methods; and a novel MTSP-based criterion to evaluate the performance of each candidate band combination.
Journal ArticleDOI
Dual-Clustering-Based Hyperspectral Band Selection by Contextual Analysis
Yuan Yuan,Jianzhe Lin,Qi Wang +2 more
TL;DR: A novel descriptor that reveals the context of HSI efficiently; a dual clustering method that includes the contextual information in the clustering process; and a new strategy that selects the cluster representatives jointly considering the mutual effects of each cluster are proposed.
Journal ArticleDOI
Optimized Hyperspectral Band Selection Using Particle Swarm Optimization
TL;DR: The experimental results show that the 2PSO-based algorithm outperforms the popular sequential forward selection (SFS) method and PSO with one particle swarm in band selection.
Journal ArticleDOI
Unsupervised Band Selection Based on Evolutionary Multiobjective Optimization for Hyperspectral Images
TL;DR: A new unsupervised band selection method called multiobjective optimization band selection (MOBS) is proposed, which can generate a set of band subsets with different numbers of bands in a single run and have a stable good performance on classification for different data sets.
References
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Journal ArticleDOI
Hyperspectral image classification and dimensionality reduction: an orthogonal subspace projection approach
J.C. Harsanyi,Chein-I Chang +1 more
TL;DR: A technique which simultaneously reduces the data dimensionality, suppresses undesired or interfering spectral signatures, and detects the presence of a spectral signature of interest is described.
Book
Hyperspectral Imaging: Techniques for Spectral Detection and Classification
TL;DR: In this article, a quantitative analysis of mixed-to-pure pixel conversion is presented, along with an anomaly detection method for unsupervised mixed pixel classification and a projection pursuit method for projection pursuit.
Journal ArticleDOI
Thematic map comparison: Evaluating the statistical significance of differences in classification accuracy
TL;DR: In this paper, the authors compare the accuracy of thematic maps derived by image classification analyses in remote sensing studies using the kappa coefficient of agreement derived for each map, which is a subjective assessment of the observed difference in accuracy but should be undertaken in a statistically rigorous fashion.
Journal ArticleDOI
Clustering-Based Hyperspectral Band Selection Using Information Measures
TL;DR: This paper presents a technique for dimensionality reduction to deal with hyperspectral images based on a hierarchical clustering structure to group bands to minimize the intracluster variance and maximize the intercluster variance.
Journal ArticleDOI
Signal processing for hyperspectral image exploitation
G. Shaw,Dimitris G. Manolakis +1 more
TL;DR: An important function of hyperspectral signal processing is to eliminate the redundancy in the spectral and spatial sample data while preserving the high-quality features needed for detection, discrimination, and classification.