NDLI: Normalized difference reflectance: an approach to quantitative Change Detection

Content Provider	IEEE Xplore Digital Library
Author	Villa, P. Lechi, G.
Copyright Year	2007
Description	Author affiliation: Politec. di Milano Univ., Milan (Villa, P.; Lechi, G.)
Abstract	Remote Sensing is usually used in practice as a tool for describing and comprehending the land cover status and the physical properties of Earth's surface, but not only. The increasing pressure of human activities on environment and the need to forecast, monitor and manage natural hazards - often due to climate change - have forced the scientific community to focus its attention on the study of environmental dynamics and time- series, thus giving great importance to Change Detection Techniques. This paper introduces a simple and effective approach to Change Detection from satellite images: the Normalized Difference Reflectance (NDR), a multi-spectral quantitative way to describe radiometric variation of surface features, variation that has to be interpreted then in order to distinguish real changes in land cover from changes related to other variations. Pre-processed multi-spectral and multi-date ASTER and ETM+ data were subjected to parametric radiometric normalization and hence converted to NDR values; these values were used then as a base for applying supervised or unsupervised classification methods to produce change maps of the areas investigated. A case study regarding a flood event and one other dealing with urban expansion were analyzed and assessed.
Starting Page	2366
Ending Page	2369
File Size	816645
Page Count	4
File Format	PDF
ISBN	9781424412112
DOI	10.1109/IGARSS.2007.4423317
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-23
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reflectivity Remote monitoring Land surface Radiometry Earth Humans Environmental management Hazards Satellite broadcasting Floods Urban Areas Change Detection Radiometric Normalization Multi-spectral Reflectance Flood Hazards
Content Type	Text
Resource Type	Article

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