Gradation correction device for generating gradation correction data in accordance with density data obtained by reading control strip, and printing system having the same
US8848248B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2013 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a gradation correction device in which the control strip has white or light-colored end patches and has at least one reference point at each of both ends of the control strip, which is defined by two straight lines including a fine line drawn on at least a part of a peripheral edge of each end patch except a border between the end patch and an adjacent patch which is adjacent to the end patch, and in which the gradation correction device detects the reference point at each of the both end portions of the control strip in the read image data, and obtains the density data of each patch by specifying a position of each patch in the control strip in the read image data in accordance with the detected reference point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.