Reduction Of Colour Shifts And Artefacts Using A Spectral Interpolation Model Based Demosaicing Algorithm

A new demosaicking algorithm for single sensor imaging devices operating on an RGB color filter array (CFA) is introduced and analyzed. This  algorithm enhances the universal demosaicing algorithm of Lukac et al by defining a new spectral interpolation model that exploits not only the information on the color of pixels but also the relative distance between neighboring pixels within an image. Moreover, we include an edge-detection model that makes this algorithm adaptive and reduces the presence of color shifts and artifacts. Experimental results indicate that the proposed algorithm exhibits excellent performance in terms of the commonly used objective criteria and at the same time it produces demosaiced images with impressive visual quality.