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Band-Specified Virtual Dimensionality for Band Selection: An Orthogonal Subspace Projection ApproachYu, Chunyan; Lee, Li-Chien; Chang, Chein-I; Xue, Bai; Song, Meiping; Chen, Jian
IEEE transactions on geoscience and remote sensing, 05/2018, Letnik: 56, Številka: 5Journal Article
This paper develops a new Neyman-Pearson detection approach, to be called band-specified virtual dimensionality (BSVD), to estimating the number of bands required by band selection (BS), <inline-formula> <tex-math notation="LaTeX">n_{\mathrm {BS}} </tex-math></inline-formula>, as well as finding desired bands at the same time. Its idea is derived from target-specified virtual dimensionality (TSVD) where targets under hypotheses as signal sources in TSVD are replaced with bands as signal sources and the test statistics derived for a Neyman-Pearson detector (NPD) is signal-to-noise ratio (SNR) that is used to derive orthogonal subspace projection (OSP) approach for hyperspectral image classification and dimensionality reduction. Accordingly, the resulting virtual dimensionality is referred to as OSP-based BSVD. Several benefits resulting from BSVD cannot be offered by the traditional BS methods. One is its direct approach to dealing with <inline-formula> <tex-math notation="LaTeX">n_{\mathrm {BS}} </tex-math></inline-formula>. Another is no-search strategy needed for finding optimal bands. Instead, it uses NPD to determine and rank desired bands for band prioritization. Most importantly, it determines <inline-formula> <tex-math notation="LaTeX">n_{\mathrm {BS}} </tex-math></inline-formula> and finds desired bands simultaneously and progressively.
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