Gradation conversion calibration by comparing grayscale and...

Details Gradation conversion calibration by comparing grayscale and... Gradation conversion calibration by comparing grayscale and...

2006-04-10

2009-06-02

Rogers, Scott A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S504000, C358S521000

Reexamination Certificate

active

07542168

ABSTRACT:
A color chart and a grayscale chart are output, and a calibration task of calculating a correction amount based on the grayscale chart by comparing a measured density value that is obtained by measuring a density of the grayscale chart and a target density value that has been found in advance, is repeated until the correction amount based on the grayscale chart is equal to or less than a first tolerance value, and at this time, as long as the correction amount based on the grayscale chart is equal to or greater than a second tolerance value that is larger than the first tolerance value, a correction amount based on the color chart is additionally calculated by comparing a measured density value that is obtained by measuring a density of the color chart and a target density value that has been found in advance, and this correction amount is used in place of the correction amount based on the grayscale chart.

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