An Efficient and Effective Color Filter Array Demosaicking Method

To reduce the cost and size, most digital still cameras (DSCs) capture only one color value at each pixel, and the results - color filter array samples - are then interpolated by a demosaicking method to construct a full-color image. Many advanced demosaicking methods have been proposed recently. However, the high complexity of these methods could prevent them from being used in DSCs. In this paper we propose an efficient and effective demosaicking method, which substitutes high-frequency component of color values in the spatial rather than frequency domain. We also propose a simple ternary, anisotropic interpolation scheme to obtain an initial full-color image required in the spatial-domain high-frequency substitution. Experimental results show that the proposed method can outperform recent state-of-the-art methods in terms of both PSNR performance and perceptual results, at the same time reducing the computational cost substantially.