Color quality assessment and color control during color reproduction
US7414755B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Dec 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6047
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for color quality assessment and color control in a color printing process is provided. The process utilizes a test element array including several test elements is co-reproduced with an image to be reproduced, whereby for the pixels of the image and the test elements of the test element array, color co-ordinate data are present in an original color space and for the test elements of the test element array the color values are present in an assessment color space are present. The co-reproduced test element array is colorimetrically measured with respect to the assessment color space, color difference of the test elements relative to the corresponding set color values are determined from the measured color values of the color elements and a color quality measure is calculated for the reproduced image and/or color correction quantities are calculated for the color reproduction process. The original color space (AFR) is divided into a larger number of color space areas. A sensitivity matrix is determined for each color space area, which for the underlying color reproduction process in the region of the respective color space area describes the connection between incremental …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.