17. A method of generating a pantograph font representation at a character comprising: receiving a character to be represented in the pantograph font representation; rasterize the character to form a grid in which each location in the grid is designated as ON or OFF, the ON/OFF locations of the grid associated with pixels defining the character, the OFF/ON locations of the grid associated with pixels defining the region of the grid encompassing the character; for each ON/OFF location, assigning a first base pattern comprising a first element; storing the grid with the assigned first base pattern in memory as a foreground pantograph representation of the character; for each OFF/ON location, assigning a second base pattern comprising a second element; and storing the grid with the assigned second base pattern as a background pantograph representation of the character; wherein the first and second base patterns are selected to provide regions of similar tone when rendered in an original document, the regions of similar tone being substantially less similar in tone in a copy of the original document to render the character visible.
17. A method of generating a pantograph font representation at a character comprising: receiving a character to be represented in the pantograph font representation; rasterize the character to form a grid in which each location in the grid is designated as ON or OFF, the ON/OFF locations of the grid associated with pixels defining the character, the OFF/ON locations of the grid associated with pixels defining the region of the grid encompassing the character; for each ON/OFF location, assigning a first base pattern comprising a first element; storing the grid with the assigned first base pattern in memory as a foreground pantograph representation of the character; for each OFF/ON location, assigning a second base pattern comprising a second element; and storing the grid with the assigned second base pattern as a background pantograph representation of the character; wherein the first and second base patterns are selected to provide regions of similar tone when rendered in an original document, the regions of similar tone being substantially less similar in tone in a copy of the original document to render the character visible. 18. The method of claim 17 , further comprising: associating a target color with the character; associating a first color calibration control value with the foreground pantograph representation to render the character in the target color; and associating a second color calibration control value with the background pantograph representation to render the inverse of the character within the target color.