Image processing apparatus
US4866534A · kind A · utility
14Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Mar 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus for transforming electic data of a half-tone image into a bi-level image by using a dither matrix, having a plurality of dither matrices of different patterns to each other, the dither matrices being chosen to remove textures due to dither processing, wherein the average of electric image data of a block of the size of the dither matrices is calculated, and a dither matrix is selected according to the average.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.