JPS5799868A - Picture signal processing system - Google Patents
Picture signal processing systemInfo
- Publication number
- JPS5799868A JPS5799868A JP55177609A JP17760980A JPS5799868A JP S5799868 A JPS5799868 A JP S5799868A JP 55177609 A JP55177609 A JP 55177609A JP 17760980 A JP17760980 A JP 17760980A JP S5799868 A JPS5799868 A JP S5799868A
- Authority
- JP
- Japan
- Prior art keywords
- level
- picture signal
- analog picture
- signals
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To enable the reproduction of a virtual intermediate tone and to prevent missing of fine lines, by converting an analog picture signal into the 1st and 2nd values with a prescribed ratio when signals of intermediate information are consecutive, in a processing system binarizing the transmitted analog picture signals. CONSTITUTION:When a solid-state scanner 1 sequentially transmits an analog picture signal (a) of a picture element, a white level detection circuit 5 outputs a maximum level as a white level signal (d) and a black level detection circuit 6 outputs a minimum level as a black level signal (e). Two reference voltage level signals (j), (k) obtained through voltage division for the level difference between the signals (d) and (e) and the analog picture signal (a) are compared at comparators 7, 8 and the analog picture signal (a) indicating the intermediate tone information is transmitted consecutively, allowing to output high and low levels alternately. At the reception side, where the analog picture signal (a) indicating the intermediate tone information is consecutively transmitted shows picture elements of white and black alternately, allowing to reproduce the intermediate tone virtually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55177609A JPS5799868A (en) | 1980-12-15 | 1980-12-15 | Picture signal processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55177609A JPS5799868A (en) | 1980-12-15 | 1980-12-15 | Picture signal processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5799868A true JPS5799868A (en) | 1982-06-21 |
Family
ID=16033988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55177609A Pending JPS5799868A (en) | 1980-12-15 | 1980-12-15 | Picture signal processing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5799868A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037879A (en) * | 1983-08-10 | 1985-02-27 | Canon Inc | Binary coding circuit |
| JPS6037880A (en) * | 1983-08-10 | 1985-02-27 | Canon Inc | Binary coding circuit |
| JPS6059868A (en) * | 1983-09-12 | 1985-04-06 | Canon Inc | Binary-coding circuit |
-
1980
- 1980-12-15 JP JP55177609A patent/JPS5799868A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037879A (en) * | 1983-08-10 | 1985-02-27 | Canon Inc | Binary coding circuit |
| JPS6037880A (en) * | 1983-08-10 | 1985-02-27 | Canon Inc | Binary coding circuit |
| JPS6059868A (en) * | 1983-09-12 | 1985-04-06 | Canon Inc | Binary-coding circuit |
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