New approach to remote gas-phase chemical quantification: selected-band algorithm
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Niu-2014-New approach to remo.pdf
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1.61 MB
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Author(s)
Niu, Sidi
Golowich, Steven E.
Ingle, Vinay K.
Manolakis, Dimitris G.
Date Issued
December 2013
Journal
Optical Engineering
Publisher
SPIE
Citation
Niu, Sidi, Steven E. Golowich, Vinay K. Ingle, and Dimitris G. Manolakis. “New Approach to Remote Gas-Phase Chemical Quantification: Selected-Band Algorithm.” Opt. Eng 53, no. 2 (December 23, 2013): 021111. © 2014 Society of Photo-Optical Instrumentation Engineers
Version
Final published version
Abstract
We propose an algorithm for standoff quantification of chemical vapor plumes from hyperspectral imagery. The approach is based on the observation that the quantification problem can be easily solved in each pixel with the use of just a single spectral band if the radiance of the pixel in the absence of the plume is known. This plume-absent radiance may, in turn, be recovered from the radiance of the subset of spectral bands in which the gas species is transparent. This “selected-band” algorithm is most effective when applied to gases with narrow spectral features, and are therefore transparent over many bands. We also demonstrate an iterative version that expands the range of applicability. Simulations show that the new algorithm attains the accuracy of existing nonlinear algorithms, while its computational efficiency is comparable to that of linear algorithms.
MIT Department
Lincoln Laboratory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1117/1.oe.53.2.021111
