JPS5614768A - Original read system - Google Patents
Original read systemInfo
- Publication number
- JPS5614768A JPS5614768A JP9001479A JP9001479A JPS5614768A JP S5614768 A JPS5614768 A JP S5614768A JP 9001479 A JP9001479 A JP 9001479A JP 9001479 A JP9001479 A JP 9001479A JP S5614768 A JPS5614768 A JP S5614768A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- output
- change
- black
- 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
- 238000005070 sampling Methods 0.000 abstract 2
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
- H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Editing Of Facsimile Originals (AREA)
- Image Processing (AREA)
- Facsimile Heads (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
PURPOSE:To prevent the overlooking of black or white of narrow width by detecting a black or white signal by scanning one line a few times and then by deciding a picture signal in accordance with the existence of a change in signal. CONSTITUTION:During a scan on each line, gate signals G1-G4 and a read signal are supplied to change detecting circuit 20 and the read signal is sequentially supplied to circuit 20 synchronizing with a clock signal of its AND output. Circuit 20 outputs signals ''1'' and ''0'', showing the existence of a change in each scan, and a picture signal of the previous line to all-black detecting circuit 30 and logical-change circuit 40. Circuit 40, when a sampling output is unchanged, supplies the output of circuit 43 to change detecting circuit 50. When the sampling output changes, on the other hand, the output of circuit 50 is NOT-ed by inverter 41 and supplied to circuit 50 again. The signal input to circuit 50 is stored in memory 55, from which it is output via ANd circuit 53 and also input to memory 55 again, where it is stored until a read to circuit 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54090014A JPS5924584B2 (en) | 1979-07-16 | 1979-07-16 | Original reading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54090014A JPS5924584B2 (en) | 1979-07-16 | 1979-07-16 | Original reading method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5614768A true JPS5614768A (en) | 1981-02-13 |
| JPS5924584B2 JPS5924584B2 (en) | 1984-06-11 |
Family
ID=13986826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54090014A Expired JPS5924584B2 (en) | 1979-07-16 | 1979-07-16 | Original reading method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5924584B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58111564A (en) * | 1981-12-25 | 1983-07-02 | Mitsubishi Electric Corp | Jitter processing method |
| JPH02118134A (en) * | 1988-10-24 | 1990-05-02 | Toray Eng Co Ltd | Controller for drawing machine |
-
1979
- 1979-07-16 JP JP54090014A patent/JPS5924584B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58111564A (en) * | 1981-12-25 | 1983-07-02 | Mitsubishi Electric Corp | Jitter processing method |
| JPH031867B2 (en) * | 1981-12-25 | 1991-01-11 | Mitsubishi Electric Corp | |
| JPH02118134A (en) * | 1988-10-24 | 1990-05-02 | Toray Eng Co Ltd | Controller for drawing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5924584B2 (en) | 1984-06-11 |
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