Title:
ON PRESS COLOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO1998043814
Kind Code:
A3
Abstract:
A novel color quality control system (10) for monitoring deviations in color during the startup and continuous running phases of printing is disclosed. The color control system (10) maintains the color of a printed page of a printing press constant, within the context of the human perceptual color space and the system (10) optimizes the settings of a plurality of ink keys in a printing press in accordance with a test image and a reference image. The test and reference images comprise a plurality of ink key zones corresponding to the plurality of ink keys, each ink key zone including a plurality of regions of interest (ROIS). The system (10) includes a unit (12) for imaging an area of the printed page in generating the reference and test images, a unit (14) for extracting color information based on actual image colors from the test image, a unit (16) for measuring color deviations with reference to the reference image, and a unit (18) for analyzing and comparing global features of regions of interest (ROIS) that cover substantially the color gamut of the test image against like features of the reference image. The analysis and comparison are based on a plurality of ROIs, all located within the same ink key zone, and the analysis and comparing unit operates to generate a set of CMYK changes to be applied to the plurality of ink keys. The system (10) also includes a unit for applying the set of CMYK changes to the plurality of ink keys.
More Like This:
| JP4315657 | Electronic safety circuit |
| JP2013169721 | INFORMATION SHARING SYSTEM FOR PRINTING MACHINE |
| WO/2019/178640 | INSPECTION OF MICRO OPTICAL EFFECT IMAGES IN THIN SUBSTRATES |
Inventors:
DAREL YAIR (IL)
NAGLER MIRIAM (IL)
WEISMAN HANAN (IL)
NAGLER MIRIAM (IL)
WEISMAN HANAN (IL)
Application Number:
PCT/IL1998/000161
Publication Date:
April 01, 1999
Filing Date:
April 02, 1998
Export Citation:
Assignee:
INTEX ISRAEL TECH CORP LTD (IL)
DAREL YAIR (IL)
NAGLER MIRIAM (IL)
WEISMAN HANAN (IL)
DAREL YAIR (IL)
NAGLER MIRIAM (IL)
WEISMAN HANAN (IL)
International Classes:
B41F33/00; (IPC1-7): B41F1/54; B41F5/16; B41F31/02
Foreign References:
| EP0658428A1 | 1995-06-21 | |||
| US5010820A | 1991-04-30 | |||
| US5524542A | 1996-06-11 | |||
| US5530563A | 1996-06-25 |
Download PDF: