JPS5558672A - Digital facsimile unit - Google Patents
Digital facsimile unitInfo
- Publication number
- JPS5558672A JPS5558672A JP13219878A JP13219878A JPS5558672A JP S5558672 A JPS5558672 A JP S5558672A JP 13219878 A JP13219878 A JP 13219878A JP 13219878 A JP13219878 A JP 13219878A JP S5558672 A JPS5558672 A JP S5558672A
- Authority
- JP
- Japan
- Prior art keywords
- gradation signal
- signal strings
- coder
- strings
- picture
- 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.)
- Granted
Links
Landscapes
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE: To reproduce a half tone by forming a gradation signal string corresponding to the density of an original in the transmission side and recording a picture with a density corresponding to the reproduced gradation signal string in the receiving side.
CONSTITUTION: A transmission original is scanned, and photoelectric conversion part 1 outputs analogue picture signals E proportional to variable densities of the transmission picture. Signals E are applied to quantizing circuit 2 and are quantized with four threshold levels to form a gradation signal strings corresponding to respective threshold levels. One-scanning components of gradation signal strings A∼D are stored in memory 3, and gradation signal strings are supplied in order from selector 4 to coder 5. After transfer of one-scanning components of gradation signal strings to coder 5, next scanning components of gradation signal strings are transferred in the same order as the proceding scanning line. Coder 5 codes run length of inputted gradation signal strings for every gradation signal string and sends it to modulator 6.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13219878A JPS5558672A (en) | 1978-10-27 | 1978-10-27 | Digital facsimile unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13219878A JPS5558672A (en) | 1978-10-27 | 1978-10-27 | Digital facsimile unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5558672A true JPS5558672A (en) | 1980-05-01 |
JPS6352512B2 JPS6352512B2 (en) | 1988-10-19 |
Family
ID=15075680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13219878A Granted JPS5558672A (en) | 1978-10-27 | 1978-10-27 | Digital facsimile unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558672A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5744383A (en) * | 1980-08-29 | 1982-03-12 | Matsushita Electric Ind Co Ltd | Band-compression system for still picture signal transmission |
JPS58197982A (en) * | 1982-05-13 | 1983-11-17 | Oki Electric Ind Co Ltd | Still picture transmitting system |
JPH03192972A (en) * | 1989-12-22 | 1991-08-22 | Fuji Xerox Co Ltd | Picture reader |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7192873B2 (en) * | 2018-10-18 | 2022-12-20 | 富士通株式会社 | Information processing program, information processing method, and learning device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4958705A (en) * | 1972-10-04 | 1974-06-07 |
-
1978
- 1978-10-27 JP JP13219878A patent/JPS5558672A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4958705A (en) * | 1972-10-04 | 1974-06-07 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5744383A (en) * | 1980-08-29 | 1982-03-12 | Matsushita Electric Ind Co Ltd | Band-compression system for still picture signal transmission |
JPS58197982A (en) * | 1982-05-13 | 1983-11-17 | Oki Electric Ind Co Ltd | Still picture transmitting system |
JPH03192972A (en) * | 1989-12-22 | 1991-08-22 | Fuji Xerox Co Ltd | Picture reader |
Also Published As
Publication number | Publication date |
---|---|
JPS6352512B2 (en) | 1988-10-19 |
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