JPS54133816A - Improving unit for picture quality - Google Patents
Improving unit for picture qualityInfo
- Publication number
- JPS54133816A JPS54133816A JP4140478A JP4140478A JPS54133816A JP S54133816 A JPS54133816 A JP S54133816A JP 4140478 A JP4140478 A JP 4140478A JP 4140478 A JP4140478 A JP 4140478A JP S54133816 A JPS54133816 A JP S54133816A
- Authority
- JP
- Japan
- Prior art keywords
- picture
- white
- signal
- black
- unit
- 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
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
Landscapes
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To obtain a picture-quality improving unit, used for a facsimile transmitter-receiver, a duplicating machine, etc., which improves picture quality by correcting a picture-element signal according to the comparison result between the signal of one picture element and picture-element signals close to this picture element. CONSTITUTION:Picture input unit 11 converts a picture image into a binary signal and then inputs it to input buffer memory 13 in picture-quality improving unit 12. Afrerwards, the picture information in memory 13 is read out via read-out circuit 14 and applied to both digital filter 18 and change-over circuit 15. Digital filter 18, serving for a low-pass filter for noise elimination, corrects this signal so that when its picture element is white (black) while its circumferential picture elements are all black (white), this picture element becomes black (white). The output of change- over circuit 15, namely, picture information is written into output buffer memory 17 by write circuit 16 and then regenerated by output unit 19.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53041404A JPS5920308B2 (en) | 1978-04-07 | 1978-04-07 | Image quality improvement device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53041404A JPS5920308B2 (en) | 1978-04-07 | 1978-04-07 | Image quality improvement device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54133816A true JPS54133816A (en) | 1979-10-17 |
JPS5920308B2 JPS5920308B2 (en) | 1984-05-12 |
Family
ID=12607421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53041404A Expired JPS5920308B2 (en) | 1978-04-07 | 1978-04-07 | Image quality improvement device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5920308B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5299720A (en) * | 1976-02-18 | 1977-08-22 | Toshiba Corp | Method of converting analogous image signal to binary value |
-
1978
- 1978-04-07 JP JP53041404A patent/JPS5920308B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5299720A (en) * | 1976-02-18 | 1977-08-22 | Toshiba Corp | Method of converting analogous image signal to binary value |
Also Published As
Publication number | Publication date |
---|---|
JPS5920308B2 (en) | 1984-05-12 |
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