Image processing method and apparatus and image forming apparatus for reducing moiré fringes in output image
US7327495B2 · kind B2 · utility
6Cited by
6References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2002 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Mar 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4092
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spatial filter applies a modulation transfer function correction process so as to increase a number of bits of input image data. A high-resolution converter converts the image data into output image data having a density higher than a sampling density of the input image data. One of the spatial filter and the resolution converter processes the image data after the other of the spatial filter and the resolution converter has processed the image data A possibility of saturation of an output of the spatial filter is decreased, thereby decreasing generation of moiré in a saturation calculation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.