Accession Number : ADA335801

Title :   A Hyperspectral Gas Analysis System (HyGAS)

Descriptive Note : Final rept. Sep 92-Nov 97

Corporate Author : SCIENCE AND TECHNOLOGY INTERNATIONAL HONOLULU HI

Personal Author(s) : Owensby, Pam ; Sunshine, Jessica ; Lo, Juliana ; Zisk, Stan

PDF Url : ADA335801

Report Date : DEC 1997

Pagination or Media Count : 104

Abstract : A prototype software hyperspectral gas analysis system (HyGAS) for standoff (remote) gas detection, identification, and analysis was designed for use with developing hyperspectral imaging spectrometer systems. HyGAS incorporates traditional (FFT, background removal and library search) and innovative (neural nets for gas identification and linear discriminants for gas detection) processing methods. Neural net and linear discriminant techniques are uniquely suited for low signal-to-noise ratio field applications, processing data quickly, and reducing data storage requirements, all important considerations for real-time exploitation and automated applications. HyGAS incorporates an interactive display-based system, where five spatial images and fifteen spectral plots can be displayed simultaneously. HyGAS applies spectral techniques of gas analysis to hyperspectral image cubes, providing a method of detecting and identifying gases and mapping regional extent and concentration. HyGAS is supplied with synthetic image cubes to simulate datasets collected by a hyperspectral imaging system over a possible gas release event covering the LWIR spectral region ( approx. 8-12 microns) with specifications selected to match the point spectronometers used to develop the neural net and linear discriminant techniques.

Descriptors :   *GAS ANALYSIS, COMPUTER PROGRAMS, LINEAR SYSTEMS, SPATIAL DISTRIBUTION, NEURAL NETS, AUTOMATION, DETECTION, SPECTROSCOPY, SIGNAL TO NOISE RATIO, IDENTIFICATION, SPECTRA, IMAGES, DATA STORAGE SYSTEMS, REMOTE DETECTION, SPECTROMETERS, DISCRIMINATE ANALYSIS.

Subject Categories : Physical Chemistry
      Logistics, Military Facilities and Supplies
      Miscellaneous Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE