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Invasive species change detection using artificial neural networks and CASI hyperspectral imagery
- For monitoring and controlling the extent and intensity of an invasive species, a direct multi-date image classification method was applied in invasive species (salt cedar) change detection in the study area of Lovelock, Nevada. With multidate Compact Airborne Spectrographic Imager (CASI) hyperspectral data sets, two types of hyperspectral CASI input data and two classifiers have been examined and compared for mapping and monitoring the salt cedar change. The two types of input data are all two-date original CASI bands and 12 principal component images (PCs) derived from the two-date CASI images. The two classifiers are an artificial neural network (ANN) and linear discriminant analysis (LDA). The experimental results indicate that (1) the direct multitemporal image classification method applied in land cover change detection is feasible either with original CASI bands or PCs, but a better accuracy was obtained from the CASI PCA transformed data; (2) with the same inputs of 12 PCs, the ANN outperforms the LDA due to the ANN's non-linear property and ability of handling data without a prerequisite of a certain distribution of the analysis data.
Pu, Ruiliang , Gong, Peng , Tian, Yong , Miao, Xin , Carruthers, Raymond I. , Anderson, Gerald L.
invasive species , Tamarix , ecological invasion , monitoring , spatial distribution , temporal variation , detection , neural networks , discriminant analysis , hyperspectral imagery , image analysis , spectral analysis , Nevada
- Includes references
- Environmental monitoring and assessment 2008 May, v. 140, no. 1-3
- Dordrecht : Springer Netherlands
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.