Apparatus and method for image processing, and computer product
US7486829B2 · kind B2 · utility
2Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Jul 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image processing apparatus, a pseudo tone processor performs a pseudo tone process by performing an area coverage modulation expression process with respect to M-bit image data, to thereby convert the M-bit image data into N-bit image data, where N is smaller than M. A lossy compressor performs lossy compression with respect to the N-bit image data, by suppressing fluctuations in a pseudo tone processing frequency within a certain range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.