1. A method for reducing sub-Nyquist aliasing artifacts in an image below a visually perceptible level, said method comprising the steps of: (a) providing source image data as an input image having sub-Nyquist aliasing artifacts; (b) using a visual perception algorithm to identify the location and characteristics of the sub-Nyquist aliasing artifacts, thereby generating artifact coordinates and parameters; and (c) processing the sub-Nyquist aliasing artifacts by reference to the artifact coordinates and parameters to reduce their visibility, thereby providing an artifact corrected image.