Patent ID: 7898690
Filing Date: 2011-03-01
Classification: H04N

Abstract:
1. A calibration precision evaluation apparatus comprising: 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 a plurality of confirmation patches including a background patch with a dot recording rate of zero and having reference values which correspond to the respective confirmation patches and are known; a color measurer color-measuring the plurality of confirmation patches, thereby acquiring respective initial color measured values; a background color shift amount calculator which calculates a first amount of background color shift between a reference value of the background patch and an initial color measured value of the background patch; a corrector which corrects the initial color measured values of the plurality of confirmation patches based on the first amount of background color shift, thereby acquiring corrected color measured values, respectively; 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 plurality of confirmation patches, respectively.