Method and apparatus for image magnification correction
US6005587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jan 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus has an adjusting mode which enables determination of a magnification correction value. A predetermined image on a test chart placed on an original table or an image of a chart fixed outside the valid image area are read, and the proper correction value for compensating for any variation in the image magnitude within a scanning system is computed based on the results of reading the test chart image. Subsequently, a printing system is operated to print test chart data read from a memory and the image printed in accordance with the test chart data is read by the scanner system which has been corrected, the result of the reading being used in computing the magnification correction value for compensating for any magnification variation occurring in the printer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.