D.D. Muresan and T.W. Parks (USA)
Demosaicing, Interpolation, Color Filter Arrays
Digital color images from single chip digital cameras are obtained by interpolating a color filter array. Color in formation is encoded by means of a CFA, which 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 dense images of the three-color planes and thus the complete color im age. Interpolation usually introduces color artifacts due to the phase shifted, aliased signals introduced by the sparse sampling of the CFAs. In this paper we discuss a non-linear interpolation scheme based on edge information, that pro duces better visual results than those obtained by linear and other published interpolation methods.
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