Method for measurement of tone reproduction curve

Details Method for measurement of tone reproduction curve Method for measurement of tone reproduction curve

1998-04-09

2000-03-07

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Of plural processes

399 53, G03G 1500, G03G 1508

Patent

active

060351527

ABSTRACT:
A printing machine having a moving imaging surface, a projecting system for modulating a beam and projecting an image onto the imaging surface, a developer for application of toner to the image projected onto the imaging surface for transfer of the image to a medium, a method of development control including the steps of; generating a setup calibration tone curve base on a preset representative halftone patches; marking a test pattern in the interdocument zone of the imaging surface, the test pattern comprising a plurality of halftone patches; sensing the test pattern and measuring a relative reflection of each of said plurality of halftone patches in the interdocument zone of the imaging surface; entering said measured values into a matrix and correlating said matrix to a plurality of print quality actuators; generating a representative tone reproduction curve base on the matrix results; producing a feedback signal by comparing the representative tone reproduction curve to said setup calibration tone curve; and adjusting independently each of said print quality actuators to adjust printing machine operation for print quality correction

REFERENCES:
patent: 5436705 (1995-07-01), Raj
patent: 5588098 (1996-12-01), Chen et al.
patent: 5749021 (1998-05-01), Mestha et al.

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