Color plane interpolation using alternating projections

Authors:
B. K. Gunturk;Y. Altunbasak;R. M. Mersereau
Affiliations:
Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA;-;-
Venue:
IEEE Transactions on Image Processing
Year:
2002

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Abstract

Most commercial digital cameras use color filter arrays to sample red, green, and blue colors according to a specific pattern. At the location of each pixel only one color sample is taken, and the values of the other colors must be interpolated using neighboring samples. This color plane interpolation is known as demosaicing; it is one of the important tasks in a digital camera pipeline. If demosaicing is not performed appropriately, images suffer from highly visible color artifacts. In this paper we present a new demosaicing technique that uses inter-channel correlation effectively in an alternating-projections scheme. We have compared this technique with six state-of-the-art demosaicing techniques, and it outperforms all of them, both visually and in terms of mean square error.