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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 2 — Jan. 10, 2007
  • pp: 167–174

Optimized algorithm for the spatial nonuniformity correction of an imaging system based on a charge-coupled device color camera

Marta de Lasarte, Jaume Pujol, Montserrat Arjona, and Meritxell Vilaseca  »View Author Affiliations

Applied Optics, Vol. 46, Issue 2, pp. 167-174 (2007)

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We present an optimized linear algorithm for the spatial nonuniformity correction of a CCD color camera's imaging system and the experimental methodology developed for its implementation. We assess the influence of the algorithm's variables on the quality of the correction, that is, the dark image, the base correction image, and the reference level, and the range of application of the correction using a uniform radiance field provided by an integrator cube. The best spatial nonuniformity correction is achieved by having a nonzero dark image, by using an image with a mean digital level placed in the linear response range of the camera as the base correction image and taking the mean digital level of the image as the reference digital level. The response of the CCD color camera's imaging system to the uniform radiance field shows a high level of spatial uniformity after the optimized algorithm has been applied, which also allows us to achieve a high-quality spatial nonuniformity correction of captured images under different exposure conditions.

© 2007 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(040.1520) Detectors : CCD, charge-coupled device
(100.2000) Image processing : Digital image processing
(110.4190) Imaging systems : Multiple imaging
(110.4280) Imaging systems : Noise in imaging systems

ToC Category:
Imaging Systems

Original Manuscript: November 3, 2005
Revised Manuscript: March 3, 2006
Manuscript Accepted: September 13, 2006

Marta de Lasarte, Jaume Pujol, Montserrat Arjona, and Meritxell Vilaseca, "Optimized algorithm for the spatial nonuniformity correction of an imaging system based on a charge-coupled device color camera," Appl. Opt. 46, 167-174 (2007)

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