Accession Number : AD1051608


Title :   Oblique Longwave Infrared Atmospheric Compensation


Descriptive Note : Technical Report,01 Sep 2014,30 Sep 2017


Corporate Author : Air Force Institute of Technology Wright-Patterson AFB United States


Personal Author(s) : O'Keefe,Daniel S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1051608.pdf


Report Date : 14 Sep 2017


Pagination or Media Count : 149


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


Descriptors :   atmospheric attenuation , biometric security , image segmentation , lapse rate , target detection , urban areas , computer vision , measurement , radiative transfer , remote sensing , altitude , algorithms , LONGWAVELENGTH INFRARED RADIATION , HYPERSPECTRAL IMAGERY


Subject Categories : Miscellaneous Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE