Image processing apparatus capable of obtaining multi-level data
US5121446A · kind A · utility
24Cited by
8References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1991 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Jul 16, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes an input unit for inputting data on an object pixel, a calculation unit for calculating an average density value of a predetermined area, and a quantization unit for converting the data on the object pixel into multi-level data on the basis of the average density value obtained by the calculation means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.