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Applied Optics

Applied Optics


  • Vol. 39, Iss. 8 — Mar. 10, 2000
  • pp: 1241–1250

Scene-Based Nonuniformity Correction with Video Sequences and Registration

Russell C. Hardie, Majeed M. Hayat, Earnest Armstrong, and Brian Yasuda  »View Author Affiliations

Applied Optics, Vol. 39, Issue 8, pp. 1241-1250 (2000)

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We describe a new, to our knowledge, scene-based nonuniformity correction algorithm for array detectors. The algorithm relies on the ability to register a sequence of observed frames in the presence of the fixed-pattern noise caused by pixel-to-pixel nonuniformity. In low-to-moderate levels of nonuniformity, sufficiently accurate registration may be possible with standard scene-based registration techniques. If the registration is accurate, and motion exists between the frames, then groups of independent detectors can be identified that observe the same irradiance (or true scene value). These detector outputs are averaged to generate estimates of the true scene values. With these scene estimates, and the corresponding observed values through a given detector, a curve-fitting procedure is used to estimate the individual detector response parameters. These can then be used to correct for detector nonuniformity. The strength of the algorithm lies in its simplicity and low computational complexity. Experimental results, to illustrate the performance of the algorithm, include the use of visible-range imagery with simulated nonuniformity and infrared imagery with real nonuniformity.

© 2000 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(040.2480) Detectors : FLIR, forward-looking infrared
(040.5160) Detectors : Photodetectors
(100.2000) Image processing : Digital image processing
(100.3020) Image processing : Image reconstruction-restoration

Russell C. Hardie, Majeed M. Hayat, Earnest Armstrong, and Brian Yasuda, "Scene-Based Nonuniformity Correction with Video Sequences and Registration," Appl. Opt. 39, 1241-1250 (2000)

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