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Feature selection of in situ subtropical hyperspectral data using principal components analysis / F.Y. Ma in Geocarto international, vol 17 n° 4 (December 2002 - February 2003)  

Public [article]  inGeocarto international > vol 17 n° 4 (December 2002 - February 2003) . - pp 25 - 32 Titre : Feature selection of in situ subtropical hyperspectral data using principal components analysis Type de document : Article/Communication Auteurs : F.Y. Ma, Auteur ; W.L. Siu, Auteur Année de publication : 2002 Article en page(s) : pp 25 - 32 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse en composantes principales [Termes IGN] bande infrarouge [Termes IGN] capteur multibande [Termes IGN] données de terrain [Termes IGN] environnement [Termes IGN] espèce végétale [Termes IGN] forêt tropicale [Termes IGN] identification automatique [Termes IGN] image hyperspectrale [Termes IGN] luminance lumineuse [Termes IGN] surveillance écologique Résumé : (Auteur) The availability of hyperspectral data is going to provide new insights for environmental studies. In this study, hyperspectral data were collected for 10 land cover types with in situ measurement and leaves of 25 subtropical tree species in laboratory measurement within the 400 900 rim spectral regions in 689 bands. These bands were subsequently filtered to 138 bands for data analysis. Principal components analysis was applied to explore the inherent data dimensions. It was found that unlike most broadband sensors from which only two dimensions, brightness and greenness, could be extracted, hyperspectral data provided additional dimensions particularly along the red edge that could help identify different land covers as well as tree species. The results of tree identification using principal components analysis were comparable to those using the raw spectral bands. Hyperspectral data analysis should be a valuable tool for environmental monitoring in the tropical and subtropical environment where a large variety of flora and habitats is found. Numéro de notice : A2003-048 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040208542251 En ligne : https://doi.org/10.1080/10106040208542251 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22345 [article]

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