New directions in the development of the ORASIS algorithm

Jeffrey Bowles; Wei Chen; David Gillis

doi:10.1117/12.509933

7 January 2004 New directions in the development of the ORASIS algorithm

Jeffrey Bowles, Wei Chen, David Gillis

Proceedings Volume 5159, Imaging Spectrometry IX; (2004) https://doi.org/10.1117/12.509933
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The Optical Real-time Adaptive Spectral Identification System (ORASIS) continues to be developed by the Naval Research Laboratory. Recently, new methods to compress hyperspectral data using ORASIS in combination with wavelets have been demonstrated. Variations on this approach continue to be pursued and will be discussed. In addition, a new method to perform target identification based on Spectral Angle Mapper (SAM) has been demonstrated. When projected into a reduced dimension space, angles between spectra are not conserved. Proper determination of the dimensions and coordinates of the subspace can result in maximizing the angles between a spectrum of interest and the general background. This approach can be used for target identification where the "target" can be a rare spectrum or something found in the general background. Recent improvements to these methods, as well as new applications of the software, are discussed.

Citation Download Citation

Jeffrey Bowles, Wei Chen, and David Gillis "New directions in the development of the ORASIS algorithm", Proc. SPIE 5159, Imaging Spectrometry IX, (7 January 2004); https://doi.org/10.1117/12.509933

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