Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1997-10-22
2000-04-04
Evans, Arthur G.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 113, G06K 1500
Patent
active
060468203
ABSTRACT:
A printer sends a calibration request to a computer upon sensing the need for calibration. Upon receiving the calibration request, the computer supplies the printer with data (logical density values) for a grayscale correction. On the basis of the grayscale correction data, the printer forms a sample image, measures the density (actual density values) of the sample image and notifies the computer of the actual density values. On the basis of the logical density values and actual density values, the computer creates a grayscale correction table (executes calibration) serving as a rule for correcting the tonality of image information. When printing is performed, the computer corrects the tonality of the image information based upon the grayscale correction table and supplies the corrected results to the printer.
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patent: 5734407 (1998-03-01), Yamada et al.
patent: 5835235 (1998-11-01), Goto et al.
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Canon Kabushiki Kaisha
Evans Arthur G.
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