Dynamic control patches for better TRC control
US6697582B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0164
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An actual tone reproduction curve of an electrophotographic system is controlled at several points to coincide with a target tone reproduction curve. The several points are referred to as level 2 control points. The level 2 control points are dynamically selected to, for example, minimize an aspect of error between the actual tone reproduction curve and the target tone reproduction curve. Test patches are generated in association with target test patch densities. Actual test patch densities are measured. An approximation of the actual tone reproduction curve is fit to the measured data. New level 2 control points are selected to minimize an aspect of deviation or error between the actual tone reproduction curve and the target tone reproduction curve. A system operative to dynamically select the level 2 control points includes means for selecting optimum level 2 control points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.