16. A method according to claim 11 , wherein the supplementary information comprises at least one of position, size, shape, color, grey scale, hue, luminance, and radiance.
11. A computer-implemented method for calibrating a document processing device from a composite document, comprising the steps of: inputting into a document processing device, a composite document comprising an image of human-readable content located in a foreground of the document and positioned relative to machine-readable code marks located in a background that are registered with the human-readable content and are encoded with at least one spatial pointer comprising a location identifier and supplementary information comprising at least one of human-readable characters, physical parameters, predefined information, and reference values for an ideal version of the human-readable content; decoding the machine-readable code to determine the location identifier and the supplementary information, wherein the location identifier comprises spatial relationships of the relative positions between the foreground and the background for the ideal version of the human-readable content; comparing the spatial relationships of the ideal version of the human-readable content with spatial relationships between the foreground and the background of the composite document and identifying distortions based on the comparison; and calibrating the document processing device based on the identified distortions, wherein the steps are performed on a suitably-programmed computer.