Idealized spectral support of a color image acquired under the Bayer pattern. In each figure, the horizontal and vertical axes span [−Π,Π)2of Fourier index, and the DC is located at the center of the figure. Solid lines indicate the baseband signals, while replicated spectra with the dashed lines arises as a result of CFA sampling. Black and red lines correspond to the support of luminance and chrominance images, respectively. Alias-inducing chrominance replications are shown with (a) Radially symmetric luminance, (b) vertical feature luminance, (c) horizontal feature luminance.