Edge-Sensing Demosaicing based on Modified Edge Indicator

In this paper, we propose a demosaicing algorithm which interpolates the missing pixels on the estimated edge direction with modified edge indicator. We use gradients to estimate the edge direction which considers cross-channel correlation in addition to the within-channel correlation. After the edge direction is estimated, we interpolate the missing color values more precisely in aid of weighted color difference values. The experimental results show that the proposed method outperforms the conventional methods, both on objective and subjective criteria. Keyword : Color interpolation, Bayer pattern, Directional interpolation, Cross-channel correlation.