In this paper we present a simple method to adjust the exposure of a hyper-spectral camera. As hyper-spectral cameras capture images over multiple wavelength-indexed bands, exposure control techniques used for tri-chromatic sensors do not often extend to hyper-spectral imagers. Here, we aim at estimating the exposure time for every wavelength channel by capturing an initial view of the scene. We then apply contrast adjustment techniques to this view of the scene so as to recover a reference cumulative distribution function (CDF) of the image brightness at each band. This CDF can then are used to calculate the new exposure time for every wavelength channel. We illustrate the utility of our method for exposure control and explore its stability with respect to both, a uniform and a Gaussian cumulative distribution functions.
History
Pagination
329-335
Location
Adelaide, South Australia
Start date
2015-11-23
End date
2015-11-25
ISBN-13
9781467367950
Language
eng
Publication classification
E1.1 Full written paper - refereed
Copyright notice
2015, IEEE
Title of proceedings
DICTA 2015 : Proceedings of the International Conference on Digital Image Computing: Techniques and Applications
Event
Digital Image Computing: Techniques and Applications. International Conference (2015 : Adelaide, South Australia)