Spectrally segmented principal component analysis of hyperspectral imagery for mapping invasive plant species

F. Tsai, E. K. Lin, K. Yoshino

研究成果: 雜誌貢獻期刊論文同行評審

83 引文 斯高帕斯(Scopus)

摘要

Principal component analysis (PCA) is one of the most commonly adopted feature reduction techniques in remote sensing image analysis. However, it may overlook subtle but useful information if applied directly to the analysis of hyperspectral data, especially for discriminating between different vegetation types. In order to accurately map an invasive plant species (horse tamarind, Leucaena leucocephala) in southern Taiwan using Hyperion hyperspectral imagery, this study developed a spectrally segmented PCA based on the spectral characteristics of vegetation over different wavelength regions. The developed algorithm can not only reduce the dimensionality of hyperspectral imagery but also extracts helpful information for differentiating more effectively the target plant species from other vegetation types. Experiments conducted in this study demonstrated that the developed algorithm performs better than correlation-based segmented principal component transformation (SPCT) and conventional PCA (overall accuracy: 86%, 76%, 66%; kappa value: 0.81, 0.69, 0.57) in detecting the target plant species, as well as mapping other vegetation covers.

原文???core.languages.en_GB???
頁(從 - 到)1023-1039
頁數17
期刊International Journal of Remote Sensing
28
發行號5
DOIs
出版狀態已出版 - 1月 2007

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