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IEEE Trans Image Process. 2005 Feb;14(2):267-78.

Demosaicing using optimal recovery.

Author information

1
Electrical and Computer Engineering Department, Cornell University, Ithaca, NY 14853, USA.

Abstract

Color images in single-chip digital cameras are obtained by interpolating mosaiced color samples. These samples are encoded in a single-chip charge-coupled device by sampling the light after it passes through a color filter array (CFA) that contains different color filters (i.e., red, green, and blue) placed in some pattern. The resulting sparsely sampled images of the three-color planes are interpolated to obtain the complete color image. Interpolation usually introduces color artifacts due to the phase-shifted, aliased signals introduced by the sparse sampling of the CFAs. This paper introduces a nonlinear interpolation scheme based on edge information that produces high-quality visual results. The new method is especially good at reconstructing the image around edges, a place where the visual human system is most sensitive.

PMID:
15700531
[Indexed for MEDLINE]

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