Image processing apparatus using two-dimensional space frequency to discriminate image type
US5018024A · kind A · utility
49Cited by
14References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Nov 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A image processing apparatus capable of faithfully reproducing half tone image, line image and dot image by distinguishing the nature of the original image. The image is discriminated by the distribution of its spatial frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.