Copy quality monitoring
US5057936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K5/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus that monitors the quality of copies reproduced by a printing machine. A signal of an image to be reproduced by the printing machine is transmitted to an electronic subsystem. The electronic subsystem converts the signal to a reference bitmap and transmits the reference bitmap to a raster output scanner in the printing machine. The printing machine reproduces the image on a copy sheet. The image reproduced on the copy sheet is scanned by a raster input scanner and a scanned bitmap generated. A comparison is made between the scanned bitmap and the reference bitmap to determine if the image reproduced on the copy sheet is at an acceptable quality level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.