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Caron JN, Montes MJ, Obermark JL. Extracting flat-field images from scene-based image sequences using phase correlation. Rev Sci Instrum. 2016;87(6):063710doi: 10.1063/1.4954730.
Caron, J. N., Montes, M. J., & Obermark, J. L. (2016). Extracting flat-field images from scene-based image sequences using phase correlation. The Review of scientific instruments, 87(6), 063710. https://doi.org/10.1063/1.4954730
Caron, James N, et al. "Extracting flat-field images from scene-based image sequences using phase correlation." The Review of scientific instruments vol. 87,6 (2016): 063710. doi: https://doi.org/10.1063/1.4954730
Caron JN, Montes MJ, Obermark JL. Extracting flat-field images from scene-based image sequences using phase correlation. Rev Sci Instrum. 2016 Jun;87(6):063710. doi: 10.1063/1.4954730. PMID: 27370462.
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Rev Sci Instrum. 2016 Jun;87(6):063710. doi: 10.1063/1.4954730.

Extracting flat-field images from scene-based image sequences using phase correlation.

The Review of scientific instruments

James N Caron, Marcos J Montes, Jerome L Obermark

Affiliations

  1. Research Support Instruments, 4325-B Forbes Boulevard, Lanham, Maryland 20706, USA.
  2. Naval Research Laboratory, Code 7231, 4555 Overlook Avenue, SW, Washington, DC 20375, USA.
  3. Naval Research Laboratory, Code 8231, 4555 Overlook Avenue, SW, Washington, DC 20375, USA.

PMID: 27370462 DOI: 10.1063/1.4954730

Abstract

Flat-field image processing is an essential step in producing high-quality and radiometrically calibrated images. Flat-fielding corrects for variations in the gain of focal plane array electronics and unequal illumination from the system optics. Typically, a flat-field image is captured by imaging a radiometrically uniform surface. The flat-field image is normalized and removed from the images. There are circumstances, such as with remote sensing, where a flat-field image cannot be acquired in this manner. For these cases, we developed a phase-correlation method that allows the extraction of an effective flat-field image from a sequence of scene-based displaced images. The method uses sub-pixel phase correlation image registration to align the sequence to estimate the static scene. The scene is removed from sequence producing a sequence of misaligned flat-field images. An average flat-field image is derived from the realigned flat-field sequence.

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