Absorptive Weak Plume Detection on Gaussian and Non-Gaussian Background Clutter
Journal Article
·
· IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
For additive signals on Gaussian clutter, the optimal detector is a linear matched filter that is adapted to the known signal and the covariance of the background. This adaptive matched filter is widely used for gas-phase plume detection, even though the effect of the plume on the background is not strictly additive. Here, a derivation of the matched filter for a strictly absorptive plume produces, in the weak plume limit, a quadratic filter. This quadratic matched filter is extended in two ways: an elliptically-contoured multivariate t distribution is used to generalize the Gaussian background clutter, and a generalized likelihood ratio test detector is derived to extend applicability to stronger plumes. In addition to detectors whose purpose is to identify presence versus absence of a plume, expressions are also derived for estimating plume strength. The performance of these various detectors is evaluated by implanting simulated plume into background images that are either real hyperspectral images or simulated images based on different (Gaussian, multivariate t, and lognormal) clutter distributions.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA); USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1835798
- Report Number(s):
- LA-UR--21-24152
- Journal Information:
- IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Journal Name: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Vol. 14; ISSN 1939-1404
- Publisher:
- IEEECopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of the Temperature-Emissivity Contrast on the Chemical Signal for Gas Plume Detection Using Thermal Image Data
Effect of Background Emissivity on Gas Detection in Thermal Hyperspectral Imagery
Construction of an Improved Bayesian Clutter Suppression Model for Gas Detection
Journal Article
·
Tue Oct 21 00:00:00 EDT 2008
· Sensors, 8(10):6471-6483
·
OSTI ID:946656
Effect of Background Emissivity on Gas Detection in Thermal Hyperspectral Imagery
Technical Report
·
Thu Oct 02 00:00:00 EDT 2008
·
OSTI ID:943410
Construction of an Improved Bayesian Clutter Suppression Model for Gas Detection
Technical Report
·
Sun Oct 27 23:00:00 EST 2002
·
OSTI ID:15010144