JPS5795760A - Picture signal processing circuit - Google Patents
Picture signal processing circuitInfo
- Publication number
- JPS5795760A JPS5795760A JP55171881A JP17188180A JPS5795760A JP S5795760 A JPS5795760 A JP S5795760A JP 55171881 A JP55171881 A JP 55171881A JP 17188180 A JP17188180 A JP 17188180A JP S5795760 A JPS5795760 A JP S5795760A
- Authority
- JP
- Japan
- Prior art keywords
- digital value
- picture signal
- signal processing
- processing circuit
- comparator
- 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
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
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To avoid poor reproduced pictures where noise or the like is emphasized, by emphasizing profile of an output of a limiter circuit, in a picture signal processor processing picture signals for profile emphasis. CONSTITUTION:An analog picture signal is converted into a digital value having a plurality of bits, a digital value of the 1st specified digital value or less set to a preset switch 79 at a limiter circuit is made coincident with a minimum digital value at a comparator 78, and a digital value of the 2nd specified digital value or more set to a preset switch 71 is made coincident with a maximum digital value at a comparator. Thus, noise at white and black background of pictures can be rejected and waveforms subjected to ease of emphasis can be obtained.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55171881A JPS5795760A (en) | 1980-12-05 | 1980-12-05 | Picture signal processing circuit |
US06/326,269 US4589034A (en) | 1980-12-05 | 1981-12-01 | Image processing apparatus |
DE3148129A DE3148129C2 (en) | 1980-12-05 | 1981-12-04 | Image processing device |
DE3153280A DE3153280C2 (en) | 1980-12-05 | 1981-12-04 | |
GB8136687A GB2091967B (en) | 1980-12-05 | 1981-12-04 | Facsimile image processor |
GB08420007A GB2142802B (en) | 1980-12-05 | 1984-08-06 | Facsimile image processor |
US06/789,839 US4748677A (en) | 1980-12-05 | 1985-10-21 | Image processing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55171881A JPS5795760A (en) | 1980-12-05 | 1980-12-05 | Picture signal processing circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5795760A true JPS5795760A (en) | 1982-06-14 |
JPH0566067B2 JPH0566067B2 (en) | 1993-09-21 |
Family
ID=15931517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55171881A Granted JPS5795760A (en) | 1980-12-05 | 1980-12-05 | Picture signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5795760A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6072085A (en) * | 1983-09-28 | 1985-04-24 | Toshiba Corp | Picture contour emphasizing device |
-
1980
- 1980-12-05 JP JP55171881A patent/JPS5795760A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6072085A (en) * | 1983-09-28 | 1985-04-24 | Toshiba Corp | Picture contour emphasizing device |
Also Published As
Publication number | Publication date |
---|---|
JPH0566067B2 (en) | 1993-09-21 |
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