Evaluation of calibration precision

Facsimile and static presentation processing – Static presentation processing – Attribute control

Reexamination Certificate

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C358S504000, C358S468000

Reexamination Certificate

active

07898690

ABSTRACT:
A calibration precision evaluating apparatus includes a calibrator carrying out calibration to adjust an ink amount output characteristic so that a measured color value is approximated to a reference value, a confirmation patch maker printing plural confirmation patches including a background patch and having the known reference values corresponding to the confirmation patches, a color measurer color-measuring the confirmation patches, acquiring initial color measured values, a background color shift amount calculator calculating a first amount of background color shift between the reference values and the initial color measured values with respect to the background patches, a corrector correcting the initial color measured values based on the background color shift amounts, acquiring corrected color measured values, and a precision evaluator carrying out precision evaluation of the calibration based on a second amount of color shift between the corrected color measured values and the reference values with respect to the confirmation patches.

REFERENCES:
patent: 7345798 (2008-03-01), Kondo
patent: 10-145598 (1998-05-01), None
patent: 2005-178180 (2005-07-01), None
patent: 2005-204053 (2005-07-01), None
patent: 2005-305864 (2005-11-01), None
patent: 2006-209407 (2006-08-01), None

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