Improved Edge-adaptive Demosaicking Method for Artifact Suppression around Line Edges

In this paper, we present an edge-adaptive demosaicking method with artifact suppression. Although various demosaicking methods have been proposed, they still suffer from artifacts around line edges. In order to suppress such undesirable artifacts around line edges, the proposed method first determines line edge patterns and interpolates missing pixels along detected directions. Then, refinement and calibration processes are carried out in series to improve the quality of reconstructed images. Experimental results demonstrate that the proposed method produces visually pleasing images and outperforms existing demosaicking methods in terms of peak signal-to-noise ratio (PSNR).