Correcting radiance data for randomly occurring nonuniform illumination of the IFOV of individual detectors in arrays

Henry Berger; Edward Howard Bosch; Edmundo Simental

doi:10.1117/12.312596

2 July 1998 Correcting radiance data for randomly occurring nonuniform illumination of the IFOV of individual detectors in arrays

Henry Berger, Edward Howard Bosch, Edmundo Simental

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Proceedings Volume 3372, Algorithms for Multispectral and Hyperspectral Imagery IV; (1998) https://doi.org/10.1117/12.312596
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

This paper discusses the nonuniform illumination of individual pixels in an array that is intrinsic to the scene viewed, as opposed to turbulence or platform motion as an error source in quantitative imagery. It describes two classes of algorithms to treat this type of problem. It points out that this problem can be viewed as a type of inverse problem with a corresponding integral equation unlike those commonly treated in the literature. One class allows estimation of the spatial variation of radiance within pixels using the single digital number irradiances produced by the measurements of the detectors within their instantaneous-fields-of-view (IFOVs). Usually it is assumed without discussion that the intrapixel radiance distribution is constant. Results are presented showing the improvements obtained by the methods discussed.

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Henry Berger, Edward Howard Bosch, and Edmundo Simental "Correcting radiance data for randomly occurring nonuniform illumination of the IFOV of individual detectors in arrays", Proc. SPIE 3372, Algorithms for Multispectral and Hyperspectral Imagery IV, (2 July 1998); https://doi.org/10.1117/12.312596

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KEYWORDS

Sensors

Inverse problems

Detection and tracking algorithms

Calibration

Solids

Turbulence

Atmospheric corrections

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