Method and apparatus for controlling the printing of an image having a plurality of printed colors
US5357448A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Feb 2, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2227/70
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for printing a multi-colored image is provided. The image is composed of a plurality of single-color images, each of which is printed by an inking means in a base color ink. The reflectance of the image is measured by a spectrophotometer. Based upon the reflectance of the image and the full-tone reflectance of the base colors in the image, the effective dot density of each of the base colors are determined. The effective dot densities of the base colors of the image are compared to the effective dot densities of the base colors of an exemplary image. Based on the comparison, control signals are sent to the inking means to adjust the amount of ink used to print the single-color images. The effective dot density of the base colors of the image are determined from the reflectance of the image using a prediction process that incorporates a modified form of Neugebauer's model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.