Abstract
A color-offset sub-sampling image acqusition method to obtain a super-high definition image is presented. The acquisition is performed with four imagers, two for green, one for red and the remained one for blue, attached on a color-separating prism, forming a "checker" sampling pattern. Optical LPFs are inserted both in vertical and horizontal direction in red and blue channels to prevent the generation of alias components in chrominance signal. This arises another problem, ie the incomplete cancellation of diagonal alias components in luminance signal. The problem is solved by inserting the optical LPFs with the same transfer function in diagonal direction of green channels as that of the LPFs for red and blue. Simulation results are presented to confirm the validity of this method.
