Pixel-density augmentation and adjustment with minimum data, in an incremental printer
US6690485B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1999 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Feb 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
One invention form is a method using all input data for one or preferably plural colorants, one time to control colorant deposition in forming a pixel array on a printing medium, and at least one other time to control deposition of more of the same colorants. At least one “applying” includes choosing data-array pixels to deposit added colorant. The two data-usage times can be associated directly with depositing colorant in respective printer passes; or may be done at (or near) rendition, sending output data to printmasking for pass allocation. Selection preferably includes setting maximum density on the medium—and choosing locations for that density, best by analyzing data to find locally dense areas, e. g. counting neighboring pixels. Selecting also includes defining locations to receive particular density, and creating additional density levels based on densities in the data array. Another method form includes defining an augmentation array and applying it to control part of colorant deposition. Preferably also included is applying the original array to control other deposition of colorant. Applying the augmentation array preferably increases colorant deposition…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.