Optimization problems of radiometric calibration for spectral sensing instruments on UAVs


Аuthors

Asadov H. G.*, Mekhtiev M. A.**, Aliyeva K. S.***

National Aerospace Agency of Azerbaijan Republic, NASA, Baku, 8th mkr., Suleiman Sani Akhundov 1

*e-mail: asadzade@rambler.ru
**e-mail: mehdi.mehdiyev218@gmail.com
***e-mail: A.khumar.1962@gmail.com

Abstract

A methodology for empirical calibration of radiometric equipment installed on unmanned aerial vehicles has been formulated to identify a certain subclass of objects on the Earth’s surface, for which a specific constraint condition holds within a given wavelength range. It is assumed that for an object of the specified subclass, an empirical regression equation suitable for radiometric calibration is known. The indicator of detection or identification of such an object is the minimization of the objective functional under the given constraint condition. If the objective functional reaches a minimum while satisfying the constraint condition, this indicates the detection or identification of the target object. A method for detecting or identifying objects of a certain subclass has been proposed; it is based on the results of radiometric calibration of objects of the specified subclass and on a regression equation valid for this subclass of objects.
In this case, the target object is considered to be identified if the functional of unconstrained variational optimization reaches a minimum for the calculated analytical expression of the primary digital samples as a function of wavelength.

Keywords:

UAVs; radiometry; measurements; calibration; object identification

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