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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 15 — May. 20, 2013
  • pp: 3526–3537

Radiometric calibration and noise estimation of acousto-optic tunable filter hyperspectral imaging systems

Jaka Katrašnik, Franjo Pernuš, and Boštjan Likar  »View Author Affiliations


Applied Optics, Vol. 52, Issue 15, pp. 3526-3537 (2013)
http://dx.doi.org/10.1364/AO.52.003526


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Abstract

The accuracy of the radiometric response of acousto-optic tunable filter (AOTF) hyperspectral imaging systems is crucial for obtaining reliable measurements. It is therefore important to know the radiometric response and noise characteristics of the hyperspectral imaging system used. A radiometric model of an AOTF hyperspectral imaging system composed of an imaging sensor radiometric model (CCD, CMOS, and sCMOS) and an AOTF light transmission model is proposed. Using the radiometric model, a method for obtaining the fixed pattern noise (FPN) of the imaging system by displacing and imaging an illuminated reference target is developed. Methods for estimating the temporal noise of the imaging system, using the photon transfer method, and for correcting FPN are also presented. Noise estimation and image restoration methods were tested on an AOTF hyperspectral imaging system. The results indicate that the developed methods can accurately calculate temporal and FPN, and can effectively correct the acquired images. After correction, the signal-to-noise ratio of the acquired images was shown to increase by 26%.

© 2013 Optical Society of America

OCIS Codes
(100.3020) Image processing : Image reconstruction-restoration
(110.4280) Imaging systems : Noise in imaging systems
(150.1488) Machine vision : Calibration
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Machine Vision

History
Original Manuscript: March 6, 2013
Revised Manuscript: April 16, 2013
Manuscript Accepted: April 17, 2013
Published: May 15, 2013

Citation
Jaka Katrašnik, Franjo Pernuš, and Boštjan Likar, "Radiometric calibration and noise estimation of acousto-optic tunable filter hyperspectral imaging systems," Appl. Opt. 52, 3526-3537 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-15-3526

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