Wavelet-Based Feature Extraction for Improved Endmember Abundance Estimation in Linear Unmixing of Hyperspectral Signals
- 15 March 2004
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. 42 (3), 644-649
- https://doi.org/10.1109/tgrs.2003.822750
Abstract
This paper shows that the use of appropriate features, such as discrete wavelet transform (DWT)-based features, can improve the least squares estimation of endmember abundances using remotely sensed hyperspectral signals. On average, the abundance estimation deviation is reduced by 30% to 50% when using the DWT-based features, as compared to the use of original hyperspectral signals or conventional principal component analysis (PCA)-based features. Theoretical analyses further reveal that the increase of endmember separability is a fundamental reason leading to this improvement. In addition, the robustness of the DWT-based features is verified experimentally. Finally, the idea is generalized as a point that the remote sensing community needs to investigate feature extraction (or dimensionality reduction) methods that are based on signal classification, such as the DWT approach, for linear unmixing problems, rather than using feature extraction methods that are based on signal representation, such as the conventional PCA approach.Keywords
This publication has 16 references indexed in Scilit:
- Brushlet transform for hyperspectral feature extraction in automated detection of nutsedge presence in soybeanPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Automated detection of subpixel hyperspectral targets with adaptive multichannel discrete wavelet transformIEEE Transactions on Geoscience and Remote Sensing, 2002
- Practical Methods of OptimizationPublished by Wiley ,2000
- Hyperspectral data analysis and supervised feature reduction via projection pursuitIEEE Transactions on Geoscience and Remote Sensing, 1999
- Supervised classification in high-dimensional space: geometrical, statistical, and asymptotical properties of multivariate dataIEEE Transactions on Systems, Man and Cybernetics, Part C (Applications and Reviews), 1998
- Forest canopy closure from classification and spectral unmixing of scene components-multisensor evaluation of an open canopyIEEE Transactions on Geoscience and Remote Sensing, 1994
- Ten Lectures on WaveletsPublished by Society for Industrial & Applied Mathematics (SIAM) ,1992
- The least-squares mixing models to generate fraction images derived from remote sensing multispectral dataIEEE Transactions on Geoscience and Remote Sensing, 1991
- Vegetation in deserts: I. A regional measure of abundance from multispectral imagesRemote Sensing of Environment, 1990
- A theory for multiresolution signal decomposition: the wavelet representationIeee Transactions On Pattern Analysis and Machine Intelligence, 1989