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dc.contributorDepartment of Land Surveying and Geo-Informaticsen_US
dc.creatorHu, Chen-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/5974-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleEfficient change detection using Principal Component Analysis-based approachen_US
dcterms.abstractChange detection techniques based on remote sensing data have been developed for several decades and provided important information for planning and decision-making. In practical applications, some analysts and researchers need a rough and quick detection to locate the change areas for a further detailed analysis. Thus, an efficiency method is needed to fulfill this requirement. This study describes an investigation into the efficiency and effectiveness of a methodology based on Principal Component Analysis (PCA). An experiment test has been conducted for the efficiency and effectiveness evaluation of this method. In this experiment, five pairs of multidate image samples with different sizes are performed by both PCA-based approach and post-classification comparison. It is found that PCA-based method can provide a significant improvement in efficiency. It is also noticed that PCA-based approach are slightly better in accuracy performance, which has proven its effectiveness in detecting changes.en_US
dcterms.extentvii, 59 leaves : ill. (some col.) ; 30 cm.en_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2011en_US
dcterms.educationalLevelAll Masteren_US
dcterms.educationalLevelM.Sc.en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.LCSHPrincipal components analysisen_US
dcterms.LCSHRemote sensingen_US
dcterms.accessRightsrestricted accessen_US

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