Higher Order Polynomial Demosaicing

Traditional digital cameras use a single charged coupled device (CCD) to capture images. In order to capture all color components (RGB), a light filter is located between the lens and the sensor, to separate the light and capture only one of these colors per pixel, this filter is known as Bayer filter. The resultant image contains the coded color components in two green pixels, one red pixel and one blue pixel per quartet, and a demosaicing process is needed to recover the coded color components. In this paper, we propose a novel methodology to perform this demosaicing on Bayer images, utilizing a higher order polynomial interpolation. We evaluate the second and third order polynomial, but, any order polynomial is easily implementable. Finally, we compare our method against well known methods such as simple interpolation demosiacing and nearest neighbor.