Test patch recognition for the measurement of tone reproduction

Details Test patch recognition for the measurement of tone reproduction Test patch recognition for the measurement of tone reproduction

1996-11-22

1998-07-21

Royer, William J.

Electrophotography

Control of electrophotography process

Of plural processes

399 53, 399 60, G03G 1500, G03G 1508

Patent

active

057846677

ABSTRACT:
A method of development control by storing a reference tone reproduction curve and sensing a relatively small segment of an arbitrary image on an imaging surface. The relatively small segment of the arbitrary image on the imaging surface is then converted into suitable density values, such as background, solid area, and halftone and a control responds to the density values to adjust the machine operation for print quality correction.

REFERENCES:
patent: 4341461 (1982-07-01), Fantozzi
patent: 5060013 (1991-10-01), Spence
patent: 5450165 (1995-09-01), Henderson
patent: 5576811 (1996-11-01), Kobayashi et al.

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