Patent ID: 7570393

Claim:
A method for calibrating a first image processing apparatus at a first location with a control image processing apparatus at a second location, wherein the method comprises the steps of: a. obtaining a plurality of individual exposure levels for the control image processing apparatus; b. plotting the individual exposure levels against time to obtain a deviation history for the control image processing apparatus; c. comparing the deviation history to an operating specification for the control image processing apparatus; and i. if the deviation history of the control image processing apparatus is within the operating specification, initiate a calibration, wherein the calibration comprises: 1. preparing a calibration curve of exposure level versus density for a plurality of shipped thermal donors; 2. computing an exposure modification curve by comparing a control thermal receiver to the shipped thermal receivers; 3. transmitting the calibration curve to the first image processing apparatus; 4. transmitting the exposure modification curve to the first image processing apparatus; and 5. adjusting the first image processing apparatus exposure levels to conform to the calibration curve and the exposure modification curve; and ii. if the deviation history of the control image processing apparatus is outside the operating specification, adjust the exposures levels of the control image processing apparatus to be within the operating specification, and then initiate a calibration using the steps (1) to (5) above.