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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 3 — Feb. 1, 2014
  • pp: 646–648

Single-image-based solution for optics temperature-dependent nonuniformity correction in an uncooled long-wave infrared camera

Yanpeng Cao and Christel-Loic Tisse  »View Author Affiliations

Optics Letters, Vol. 39, Issue 3, pp. 646-648 (2014)

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In this Letter, we propose an efficient and accurate solution to remove temperature-dependent nonuniformity effects introduced by the imaging optics. This single-image-based approach computes optics-related fixed pattern noise (FPN) by fitting the derivatives of correction model to the gradient components, locally computed on an infrared image. A modified bilateral filtering algorithm is applied to local pixel output variations, so that the refined gradients are most likely caused by the nonuniformity associated with optics. The estimated bias field is subtracted from the raw infrared imagery to compensate the intensity variations caused by optics. The proposed method is fundamentally different from the existing nonuniformity correction (NUC) techniques developed for focal plane arrays (FPAs) and provides an essential image processing functionality to achieve completely shutterless NUC for uncooled long-wave infrared (LWIR) imaging systems.

© 2014 Optical Society of America

OCIS Codes
(100.2980) Image processing : Image enhancement
(100.3010) Image processing : Image reconstruction techniques
(110.3080) Imaging systems : Infrared imaging
(110.4280) Imaging systems : Noise in imaging systems

ToC Category:
Image Processing

Original Manuscript: September 25, 2013
Revised Manuscript: November 12, 2013
Manuscript Accepted: December 9, 2013
Published: January 29, 2014

Yanpeng Cao and Christel-Loic Tisse, "Single-image-based solution for optics temperature-dependent nonuniformity correction in an uncooled long-wave infrared camera," Opt. Lett. 39, 646-648 (2014)

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