| 摘要 |
An apparatus and method for maintaining tone reproduction for printing of a final halftoned image in a printer, including scanner for generating a continuous tone image. A halftoner is provided for generating pixel data based on the continuous tone image, each pixel data having pixel position parameters and desired pixel darkness parameters. A developer unit is provided for marking representative halftone targets on an imageable surface with toner. A sensor is provided for sensing an amount of toner on each of the representative halftone targets. A tone control system is provided for generating a representative tone reproduction curve based on the amount of toner sensed on the representative halftone targets. A monitoring system is provided for producing a feedback signal by comparing the representative tone reproduction curve to a setup calibration tone curve, and wherein the halftoner being responsive to the monitor system, adjusts pixel data of each pixel of the final halftone image to compensate for deviation between representative tone reproduction curve and the setup calibration tone curve during printer operation to achieve the desired tonality of the final halftone image.
|
