Procedure for producing a reference model intended to be used for automatically checking the printing quality of an image on paper
US5778088A · kind A · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F33/0081
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A procedure for producing a reference model for checking the printing quality of an image composed of at least two drawings starts with printed test sheets. The sheets are aligned so that drawings printed in a first printing are in register. The images are recorded, storing the densitometric pixel values which constitute the images in memory. The minimum value obtained is associated with each pixel and a model for the first drawing is obtained. The same procedure is followed for producing a second drawing and another model. The models thus obtained are recombined in order to form the reference model of the image to be checked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.