JPS55146451A - Sharpness emphasis method in image scanning recorder - Google Patents
Sharpness emphasis method in image scanning recorderInfo
- Publication number
- JPS55146451A JPS55146451A JP5350779A JP5350779A JPS55146451A JP S55146451 A JPS55146451 A JP S55146451A JP 5350779 A JP5350779 A JP 5350779A JP 5350779 A JP5350779 A JP 5350779A JP S55146451 A JPS55146451 A JP S55146451A
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- original
- signal
- sharpness
- change amount
- 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
- H04N1/409—Edge or detail enhancement; Noise or error suppression
- H04N1/4092—Edge or detail enhancement
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Picture Signal Circuits (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
- Facsimiles In General (AREA)
- Image Processing (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5350779A JPS55146451A (en) | 1979-05-02 | 1979-05-02 | Sharpness emphasis method in image scanning recorder |
GB8014247A GB2050747B (en) | 1979-05-02 | 1980-04-30 | Image enhancement using unsharp masking |
US06/145,443 US4335407A (en) | 1979-05-02 | 1980-05-01 | Sharpness emphasizing method and machine used in a picture reproducing machine |
IL59976A IL59976A (en) | 1979-05-02 | 1980-05-01 | Sharpness emphasizing method and device used in a picture reproducing machine |
IT21758/80A IT1130348B (it) | 1979-05-02 | 1980-05-02 | Apparecchiatura e metodo per accentuare la nitidezza in una macchina per la riproduzione di immagini |
IT8021697U IT8021697V0 (it) | 1979-05-02 | 1980-05-02 | Apparecchiatura e metodo per accentuare la nitidezza in una macchina per la riproduzione di immagini. |
DE3016978A DE3016978C2 (de) | 1979-05-02 | 1980-05-02 | Verfahren zur Schärfebetonung bei der Bildreproduktion und Schärfebetonungsvorrichtung |
FR8009954A FR2455762B1 (fr) | 1979-05-02 | 1980-05-05 | Procede et dispositif d'amelioration de la nettete pour la reproduction d'images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5350779A JPS55146451A (en) | 1979-05-02 | 1979-05-02 | Sharpness emphasis method in image scanning recorder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55146451A true JPS55146451A (en) | 1980-11-14 |
JPS6142262B2 JPS6142262B2 (ja) | 1986-09-19 |
Family
ID=12944726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5350779A Granted JPS55146451A (en) | 1979-05-02 | 1979-05-02 | Sharpness emphasis method in image scanning recorder |
Country Status (7)
Country | Link |
---|---|
US (1) | US4335407A (ja) |
JP (1) | JPS55146451A (ja) |
DE (1) | DE3016978C2 (ja) |
FR (1) | FR2455762B1 (ja) |
GB (1) | GB2050747B (ja) |
IL (1) | IL59976A (ja) |
IT (2) | IT8021697V0 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888969A (ja) * | 1981-11-20 | 1983-05-27 | Ricoh Co Ltd | 画像鮮明化処理方法 |
JPS58182957A (ja) * | 1982-04-20 | 1983-10-26 | Fuji Photo Film Co Ltd | 画像の鮮鋭度強調方式 |
EP0449259A2 (en) * | 1990-03-28 | 1991-10-02 | Fuji Photo Film Co., Ltd. | Method and apparatus for emphasizing sharpness of image |
US5220624A (en) * | 1990-04-10 | 1993-06-15 | Dainippon Screen Mfg. Co., Ltd. | Apparatus for reading images and method for enhancing the outlines of shapes |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5769234U (ja) * | 1980-10-15 | 1982-04-26 | ||
DE3139483C2 (de) * | 1981-10-03 | 1985-06-13 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Verfahren und Schaltungsanordnung zur Kontraststeigerung |
ATE25453T1 (de) * | 1981-10-19 | 1987-02-15 | Hell Rudolf Dr Ing Gmbh | Verfahren zur verbesserung der kontrastanhebung. |
JPS58141078A (ja) * | 1982-02-16 | 1983-08-22 | Dainippon Screen Mfg Co Ltd | 画像走査記録方法及び装置 |
ATE18815T1 (de) * | 1982-07-03 | 1986-04-15 | Hell Rudolf Dr Ing Gmbh | Verfahren und anordnung zur kontraststeigerung. |
JPS60169274A (ja) * | 1984-02-10 | 1985-09-02 | Dainippon Screen Mfg Co Ltd | 画像走査記録装置に於ける輪郭強調信号処理方法 |
US4817180A (en) * | 1984-11-10 | 1989-03-28 | Dainippon Screen Mfg. Co., Ltd. | Image signal filtering |
JPS61230571A (ja) * | 1985-04-05 | 1986-10-14 | Dainippon Screen Mfg Co Ltd | 画像走査装置 |
JPS63156475A (ja) * | 1986-12-19 | 1988-06-29 | Dainippon Screen Mfg Co Ltd | 多階調画像読取装置 |
JP2575476B2 (ja) * | 1988-10-20 | 1997-01-22 | 富士写真フイルム株式会社 | 画像信号処理方法およびその装置 |
JP2555430B2 (ja) * | 1988-11-07 | 1996-11-20 | 大日本スクリーン製造 株式会社 | 画像の輪郭強調方法 |
JPH02202175A (ja) * | 1989-01-30 | 1990-08-10 | Dainippon Screen Mfg Co Ltd | 画像走査記録装置における鮮鋭度強調方法 |
JP2620368B2 (ja) * | 1989-04-18 | 1997-06-11 | 富士写真フイルム株式会社 | 画像信号処理方法およびその装置 |
US5485534A (en) * | 1990-03-28 | 1996-01-16 | Fuji Photo Film Co., Ltd. | Method and apparatus for emphasizing sharpness of image by detecting the edge portions of the image |
DE69115117T2 (de) * | 1990-04-26 | 1996-05-09 | Scitex Corp Ltd | Gerät zur Verbesserung der Schärfe bei einem Farbbild. |
US5799111A (en) * | 1991-06-14 | 1998-08-25 | D.V.P. Technologies, Ltd. | Apparatus and methods for smoothing images |
US5761392A (en) * | 1995-06-06 | 1998-06-02 | Apple Computer, Inc. | Process of making two adjacent uniformly colored objects appear with a diminished gap in between |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH332844A (de) * | 1954-11-10 | 1958-09-30 | Hell Rudolf Dr Ing Fa | Verfahren zur Herstellung von gerasterten Klischees mit automatischer Tonwertkorrektur und Vorrichtung zur Durchführung des Verfahrens |
DE1039842B (de) * | 1957-08-14 | 1958-09-25 | Rudol Hell Dr Ing | Verfahren zur kuenstlichen Kontraststeigerung an Tonwertspruengen und Konturen in mittels elektronischer Klischier-maschinen herzustellenden Klischees |
GB1096376A (en) * | 1965-09-20 | 1967-12-29 | Derek John Kyte | Improvements in or relating to photographic reproduction |
DE2226990C3 (de) * | 1972-06-02 | 1976-01-02 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Anordnung zur Verbesserung der Schärfe bei der Aufzeichnung von Halbtonbildern |
DE2805237C3 (de) * | 1978-02-08 | 1984-09-06 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Anordnung zur Kontraststeigerung |
-
1979
- 1979-05-02 JP JP5350779A patent/JPS55146451A/ja active Granted
-
1980
- 1980-04-30 GB GB8014247A patent/GB2050747B/en not_active Expired
- 1980-05-01 US US06/145,443 patent/US4335407A/en not_active Expired - Lifetime
- 1980-05-01 IL IL59976A patent/IL59976A/xx unknown
- 1980-05-02 DE DE3016978A patent/DE3016978C2/de not_active Expired
- 1980-05-02 IT IT8021697U patent/IT8021697V0/it unknown
- 1980-05-02 IT IT21758/80A patent/IT1130348B/it active
- 1980-05-05 FR FR8009954A patent/FR2455762B1/fr not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888969A (ja) * | 1981-11-20 | 1983-05-27 | Ricoh Co Ltd | 画像鮮明化処理方法 |
JPS58182957A (ja) * | 1982-04-20 | 1983-10-26 | Fuji Photo Film Co Ltd | 画像の鮮鋭度強調方式 |
EP0449259A2 (en) * | 1990-03-28 | 1991-10-02 | Fuji Photo Film Co., Ltd. | Method and apparatus for emphasizing sharpness of image |
EP0449259B1 (en) * | 1990-03-28 | 1996-10-02 | Fuji Photo Film Co., Ltd. | Method and apparatus for emphasizing sharpness of image |
US5220624A (en) * | 1990-04-10 | 1993-06-15 | Dainippon Screen Mfg. Co., Ltd. | Apparatus for reading images and method for enhancing the outlines of shapes |
Also Published As
Publication number | Publication date |
---|---|
IT1130348B (it) | 1986-06-11 |
IL59976A (en) | 1984-09-30 |
GB2050747B (en) | 1984-01-25 |
FR2455762A1 (fr) | 1980-11-28 |
IT8021697V0 (it) | 1980-05-02 |
DE3016978C2 (de) | 1985-01-17 |
JPS6142262B2 (ja) | 1986-09-19 |
US4335407A (en) | 1982-06-15 |
IL59976A0 (en) | 1980-07-31 |
GB2050747A (en) | 1981-01-07 |
FR2455762B1 (fr) | 1987-01-16 |
DE3016978A1 (de) | 1980-11-20 |
IT8021758A0 (it) | 1980-05-02 |
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