COLOR FILTER ARRAY INTERPOLATION

摘要

A CFA demosaicing algorithm, which utilizes constant color difference rule to determine green, red and blue Bayer planes is disclosed. Also disclosed are several high-level green plane interpolation algorithms. In one embodiment, a green plane interpolation algorithm utilize inverse gradient weighted estimate. In another embodiment, the green plane interpolation algorithms combine horizontal and vertical gradient estimates with the gradients computed as weights. Yet in another embodiment, a green plane interpolation with gradient consistency may be used. Also disclosed is a one-dimensional transform-based green updating algorithm, which provides directional interpolation, thereby reducing effect of zipper artifacts in the demosaiced image.