A cardinal-direction quincunx based interpolation technique with non-uniform inter-plane weighting for bayer CFA demosaicking

This paper presents a new weighted interpolation technique to address the Bayer Color Filter Array (CFA) demosaicking problem. The proposed technique provides two contributions that have not been reported in conventional interpolation methods. Firstly, it exploits the quincuncial nature of the green component of the Bayer CFA. The second contribution treats each of the three planes or lattices of the CFA mosaic as distinct and is weighted uniquely. The proposed technique is compared with other interpolation-based demosaicking algorithms and a significant improvement in performance has been noted through experimental results. In addition, to provide objectivity in analysis, three test measures have been used - CPSNR, CIELAB and CIEDE2000.