Impacts of Feature Normalization on Optical and SAR Data Fusion for Land Use/Land Cover Classification
Publication in refereed journal


Times Cited
Web of Science30WOS source URL (as at 20/09/2020) Click here for the latest count
Altmetrics Information
.

Other information
AbstractLand use/land cover (LULC) classification using optical and synthetic aperture radar (SAR) remote sensing images is becoming increasingly important to produce more accurate LULC products. As an important step, feature normalization techniques have been studied by the areas of pattern recognition. Nevertheless, because of the totally different imaging mechanisms of optical and SAR sensors, most of the existing normalization approaches are not suitable for optical and SAR data fusion. Moreover, whether normalization is a significant step remains unclear regarding optical and SAR fusion. Taking the Satellite Pour l'Observation de la Terre (SPOT-5) and the Advanced Land Observing Satellite (ALOS)/Phased Array type L-band SAR (PALSAR) (HH and HV polarizations) as the optical and SAR data, this letter aims to evaluate the impact of feature normalization. Experimental results indicated that feature normalization is not necessarily significant depending on fusion methods. For instance, distribution-dependent classifiers (e.g., a maximum likelihood classifier) are independent of feature normalization; thus, it has no impact on the results when using these classifiers. Moreover, advanced classifiers (e.g., a support vector machine) with built-in normalization are also not influenced by feature normalization. In contrast, a minimum distance classifier and an artificial neural network (ANN) depend on the input values of optical and SAR features and thus can be influenced by feature normalization. However, our experiments showed a fluctuation in classification accuracy using an ANN with normalized features. Therefore, more experiments are required to investigate the optimal normalization approaches for the optical and SAR images when using an ANN as the fusion method.
All Author(s) ListZhang HS, Lin H, Li Y
Journal nameIEEE Geoscience and Remote Sensing Letters
Year2015
Month5
Day1
Volume Number12
Issue Number5
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1061 - 1065
ISSN1545-598X
eISSN1558-0571
LanguagesEnglish-United Kingdom
KeywordsLand use/land cover (LULC); normalization; optical and synthetic aperture radar (SAR) data fusion; polarimetric SAR
Web of Science Subject CategoriesEngineering; Engineering, Electrical & Electronic; Geochemistry & Geophysics; Imaging Science & Photographic Technology; Remote Sensing

Last updated on 2020-21-09 at 00:55