Active color control for a printing press

Details Active color control for a printing press Active color control for a printing press

2007-03-06

2007-03-06

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S504000, C358S496000

Reexamination Certificate

active

10234304

ABSTRACT:
A system for the accurate measurement and control of image color density on an operating printing press. The method and apparatus control the printing of a multicolored image by controlling the amount of each of the inks used to print an image based on the color densities of each of the inks detected in printed images. The process includes controlling the positioning and linear movement of a strobe and a digital video camera across a substrate having images printed thereon; illuminating the images with a strobe; selecting and acquiring the images via a digital video camera and producing a digitized representation thereof; selecting a portion of the images; measuring and analyzing the color intensity of the selected portion of the images and producing reflective density values thereof, and storing said reflective density values in a first memory; comparing the reflective density values for the portion of the images to standard density values in a second memory for the portion of the images.

REFERENCES:
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patent: 6058201 (2000-05-01), Sikes et al.
patent: 6318260 (2001-11-01), Chu et al.

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