Normalised sensitivity of a virtual averaging-and-sampler sensor used for illustration purposes only. The black curve corresponds to the sensitivity function of a sampling grid of step h/2. The dotted curve represents the sensitivity of a sampling grid of step h. The red curve is obtained by dealiasing the spectral sensitivity up to 1/h, that is, the first null of the sinc function with a super-resolution factor of 2; by combining two sampling grids of step h relatively shifted by h/2 with respect to each other.