Recording apparatus and method of picture image
US4495522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1982 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Jul 6, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of and apparatus for recording picture image wherein by a memory circuit are memorized a plurality of matrix groups each having a plurality of threshold values with a predetermined density distribution arrayed according to a predetermined order, by a circuit is divided a picture image to be recorded into a plurality of picture regions and is obtained picture density data for each of the regions is obtained, by a matrix selecting circuit is selected from the plurality of matrix groups memorized in the memory circuit matrices corresponding to the picture density data detected for each of the regions, and by a comparator is compared each picture element level of electric signals indicating a picture image information with each threshold value of the matrix selected by the matrix selecting means and is generated an output binary signals thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.