Smoothing calibration files to improve reproduction of digitized images

A method for developing a valid calibration profile for a scanning system, the method comprising:

• scanning an image to obtain the plurality of calibration signals to an initial extent of the image;
• extrapolating the calibration signals to form extended range signals;
• applying multirate filtering to the extended range signals to form a plurality of filtered signals;
• and
• truncating the plurality of filtered signals to the initial extent to form said at least one valid profile.

An article of manufacture comprising:

• a computer usable medium having computer readable program code means embodied therein for causing the development of a valid calibration profile for a scanning system, the computer readable program code means in said article of manufacture comprising computer readable program code means for causing a computer to effect:
• scanning an image to obtain the plurality of calibration signals to an initial extent of the image;
• extrapolating the calibration signals to form extended range signals;
• applying multirate filtering to the extended range signals to form a plurality of filtered signals;
• and
• truncating the plurality of filtered signals to the initial extent to form said at least one valid profile.

A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for developing a valid calibration profile for a scanning system, said method steps comprising:

• scanning an image to obtain the plurality of calibration signals to an initial extent of the image;
• extrapolating the calibration signals to form extended range signals;
• applying multirate filtering to the extended range signals to form a plurality of filtered signals;
• and
• truncating the plurality of filtered signals to the initial extent to form said at least one valid profile.