Method for darkness correction of trapped pixels
US7339701B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Aug 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for correcting for edge defects caused by print characteristics of a print engine includes printing a set of actual color patches corresponding to a desired set of colors; defining an edge region and a uniform area region in each of the patches; for each color patch in the set of actual color patches: determining a difference between color in the edge region of the patch and color in the uniform area region of the patch; and generating an edge response to adjust color output of the print engine in the edge region to substantially match color output in the uniform area region. The method can perform edge correction for any edge region of an image. In one embodiment of the invention, the edge region may be determined by a trap engine associated with the print engine and the method can provide correction for trap pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.