Oblique Longwave Infrared Atmospheric Compensation

Abstract

This research introduces two novel oblique longwave infrared atmospheric compensation techniques for hyperspectral imagery, Oblique In-Scene Atmospheric Compensation (OISAC) and Radiance Detrending (RD). Current atmospheric compensation algorithms have been developed for nadir-viewing geometries which assume that every pixel in the scene is affected by the atmosphere in nearly the same manner. However, this assumption is violated in oblique imaging conditions where the transmission and path radiance vary continuously as a function of object-sensor range, negatively impacting current algorithms in their ability to compensate for the atmosphere. The techniques presented here leverage the changing viewing conditions to improve rather than hinder atmospheric compensation performance. Initial analyses of both synthetic and measured hyperspectral images suggest improved performance in oblique viewing conditions compared to standard techniques

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Document Details

Document Type
Technical Report
Publication Date
Sep 14, 2017
Accession Number
AD1051608

Entities

People

  • Daniel S. O’keefe

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Air Temperature
  • Algorithms
  • Atmospheric Attenuation
  • Atmospheric Temperature
  • Computer Vision
  • Department Of Defense
  • Detection
  • Elevation
  • Geometry
  • Hyperspectral Imagery
  • Lapse Rate
  • Radiative Transfer
  • Scattering
  • Short-Wavelength Infrared Radiation
  • United States
  • United States Government

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Image Processing and Computer Vision.
  • Spectroscopy.