Closed loop color control of selected regions using solid color regions within images

摘要

A color control system for use in a printing press is provided. The system includes a controller for reviewing digital data for a print job and identifying solid color regions of the print job that are greater than a predetermined size, a user interface allowing an operator to select solid color regions identified by the controller, a sensor for measuring a characteristic of the selected solid color regions of the print job on a printed substrate, the controller determining measured values of the characteristic for each of the selected solid color regions, and at least one inking unit for supplying ink in a plurality of ink zones to a plate cylinder, the controller varying the ink supplied to ink zones including the solid color regions as function of a difference between the measured value of the characteristic of each selected solid color region and a predetermined target value of the characteristic. A method for controlling printing of a printing press is also provided.

主权项

1. A color control system for use in a printing press comprising:
a controller for reviewing digital data for a print job including solid color regions of the print job that are greater than a predetermined size and identifying solid color regions of the print job that are greater than the predetermined size; a user interface allowing an operator to select solid color regions identified by the controller; a sensor for measuring a characteristic of the selected solid color regions of the print job on a printed substrate, the controller determining measured values of the characteristic for each of the selected solid color regions; and at least one inking unit for supplying ink in a plurality of ink zones to a plate cylinder, the controller varying the ink supplied to ink zones including the solid color regions as function of a difference between the measured value of the characteristic of each selected solid color region and a predetermined target value of the characteristic.