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High dynamic range imaging method for interferometry

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Quiroga Mellado, Juan Antonio and Vargas, Javier and Restrepo, R. and Belenguer Dávila, Tomás (2011) High dynamic range imaging method for interferometry. Optics Communications, 284 (18). pp. 4141-4545. ISSN 0030-4018

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Official URL: http://dx.doi.org/10.1016/j.optcom.2011.04.059


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Abstract

We demonstrate a method to easily and quickly extend the dynamic range imaging capabilities of the camera in a typical interferometric approach. The camera dynamic range is usually low and limited to 256 gray levels. Also, it is well known that one may have over or under-exposed regions in the interferogram (due to non-uniform illumination) which makes these image regions not reliable. In our proposed method it is not necessary to obtain or use the non-linear camera response curve in order to extend the camera dynamic range. We obtain a sequence of differently exposed interferograms, typically five or six; after that, we compute the corresponding normalized fringe patterns and modulation maps using a typical normalization method. These normalized patterns are combined through a temporal weighted average using as weights the corresponding modulation maps. We show a set of experimental results that prove the effectiveness of the proposed method.


Item Type:Article
Additional Information:

© 2011 Elsevier Science B. V.

Uncontrolled Keywords:Normalization
Subjects:Sciences > Physics > Optics
ID Code:22204
Deposited On:06 Jul 2013 19:33
Last Modified:07 Feb 2014 10:43

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