DE68916011T2 - Automatische referenzregelung für bildabtaster. - Google Patents
Automatische referenzregelung für bildabtaster.Info
- Publication number
- DE68916011T2 DE68916011T2 DE68916011T DE68916011T DE68916011T2 DE 68916011 T2 DE68916011 T2 DE 68916011T2 DE 68916011 T DE68916011 T DE 68916011T DE 68916011 T DE68916011 T DE 68916011T DE 68916011 T2 DE68916011 T2 DE 68916011T2
- Authority
- DE
- Germany
- Prior art keywords
- scanter
- image
- reference control
- automatic reference
- automatic
- 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.)
- Expired - Fee Related
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
-
- 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
- H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
- H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Input (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/263,461 US5267053A (en) | 1988-10-27 | 1988-10-27 | Automatic reference control for image scanners |
PCT/US1989/004802 WO1990004900A1 (en) | 1988-10-27 | 1989-10-25 | Automatic reference control for image scanners |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68916011D1 DE68916011D1 (de) | 1994-07-14 |
DE68916011T2 true DE68916011T2 (de) | 1995-01-05 |
Family
ID=23001881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68916011T Expired - Fee Related DE68916011T2 (de) | 1988-10-27 | 1989-10-25 | Automatische referenzregelung für bildabtaster. |
Country Status (5)
Country | Link |
---|---|
US (1) | US5267053A (de) |
EP (1) | EP0396708B1 (de) |
JP (1) | JPH03501916A (de) |
DE (1) | DE68916011T2 (de) |
WO (1) | WO1990004900A1 (de) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69118217T2 (de) * | 1990-01-25 | 1996-08-22 | Hewlett Packard Co | Verfahren und Vorrichtung zur Ausstattung eines Dokumentenlesers mit Belichtungskompensation |
US5278674A (en) * | 1990-01-25 | 1994-01-11 | Hewlett-Packard Company | Method and apparatus for providing illumination compensation in a document scanner |
US5424537A (en) * | 1990-08-13 | 1995-06-13 | Howtek, Inc. | Calibrated color scanner |
JPH0563978A (ja) * | 1991-08-30 | 1993-03-12 | Toshiba Corp | 画像読取装置 |
DE69332315T2 (de) * | 1992-02-25 | 2003-01-23 | Fujitsu Ltd | Bildbinarisierungssystem |
US5915049A (en) * | 1992-02-25 | 1999-06-22 | Pfu Limited | Binarization system for an image scanner |
US5625718A (en) * | 1992-02-25 | 1997-04-29 | Pfu Limited | White level setting system for an image scanner |
WO1993018993A1 (en) * | 1992-03-19 | 1993-09-30 | Pfu Limited | Image reader |
JPH06189130A (ja) * | 1992-12-16 | 1994-07-08 | Fuji Xerox Co Ltd | 画像処理装置 |
US5519441A (en) * | 1993-07-01 | 1996-05-21 | Xerox Corporation | Apparatus and method for correcting offset and gain drift present during communication of data |
JPH07298007A (ja) * | 1994-04-22 | 1995-11-10 | Fujitsu Ltd | 画像読取装置及び画像読取方法及び白レベル補正方法及び白レベル生成方法 |
JP3091084B2 (ja) * | 1994-06-22 | 2000-09-25 | シャープ株式会社 | 信号処理回路 |
JP3525500B2 (ja) * | 1994-07-26 | 2004-05-10 | ミノルタ株式会社 | 固体撮像装置 |
US6038038A (en) * | 1994-08-24 | 2000-03-14 | Xerox Corporation | Method for determining offset and gain correction for a light sensitive sensor |
US5563723A (en) * | 1994-08-31 | 1996-10-08 | Eastman Kodak Company | Method of calibration of image scanner signal processing circuits |
US5726771A (en) * | 1994-10-31 | 1998-03-10 | Hewlett-Packard Company | System and method for optimizing tonal resolution in an optical scanner |
US6067175A (en) * | 1995-09-14 | 2000-05-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for white balance |
KR100306419B1 (en) * | 1997-11-29 | 2001-08-09 | Samsung Electronics Co Ltd | Method for correcting shading of shuttle scanner |
TW385605B (en) * | 1998-05-20 | 2000-03-21 | Mustek Systems Inc | A method applied to image scanning device for gaining vertical amplification errors |
JP4097800B2 (ja) | 1998-09-07 | 2008-06-11 | 株式会社東芝 | 画像処理方法および画像処理装置 |
US6249358B1 (en) | 1998-12-23 | 2001-06-19 | Eastman Kodak Company | Method of scanning photographic film images using selectively determined system response gain calibration |
US6462772B1 (en) * | 1998-12-23 | 2002-10-08 | Eastman Kodak Company | Method of calibrating image scanning apparatus of a photographic film scanner |
US6327047B1 (en) * | 1999-01-22 | 2001-12-04 | Electronics For Imaging, Inc. | Automatic scanner calibration |
US6690420B1 (en) * | 1999-02-05 | 2004-02-10 | Syscan, Inc. | Integrated circuit architecture of contact image sensor for generating binary images |
US6304826B1 (en) * | 1999-02-05 | 2001-10-16 | Syscan, Inc. | Self-calibration method and circuit architecture of image sensor |
GB9906765D0 (en) * | 1999-03-25 | 1999-05-19 | Colour Valid Limited | Colour Monitoring |
US7053941B1 (en) * | 1999-08-19 | 2006-05-30 | Canon Kabushiki Kaisha | Image input apparatus |
US7064781B1 (en) * | 1999-12-17 | 2006-06-20 | Xerox Corporation | Apparatus and methods of calibrating pixel off set and pixel gain using digitial hardware |
JP3885987B2 (ja) * | 2000-05-18 | 2007-02-28 | 株式会社リコー | 画像読取装置および画像形成装置 |
FR2815502B1 (fr) * | 2000-10-13 | 2002-12-13 | Commissariat Energie Atomique | Dispositif de detection d'un flux photonique a balayage autoadaptatif |
US20020140996A1 (en) * | 2001-04-02 | 2002-10-03 | Spears Kurt E. | Optical image scanner using pre-scan and post-scan compensation for illumination nonuniformity |
US7233418B2 (en) * | 2001-05-15 | 2007-06-19 | Hewlett-Packard Development Company, L.P. | Calibration method for quick scanning starts |
AUPS058702A0 (en) * | 2002-02-15 | 2002-03-14 | Proteome Systems Intellectual Property Pty Ltd | Method for locating the coordinates of an object on a flat bed scanner or the like |
KR100579513B1 (ko) * | 2004-07-29 | 2006-05-15 | 삼성전자주식회사 | 스캐너 및 스캐닝 유닛의 위치제어방법 |
US7889251B1 (en) * | 2005-06-08 | 2011-02-15 | National Semiconductor Corporation | Method and device for white level calibration |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3379826A (en) * | 1965-05-05 | 1968-04-23 | Sylvania Electric Prod | Video processing system providing correction for changes in the light source intensity and for light fluctuations due to different page reflectivities |
US4216503A (en) * | 1979-03-26 | 1980-08-05 | Xerox Corporation | Signal restoration and gain control for image viewing devices |
JPS5660165A (en) * | 1979-10-20 | 1981-05-23 | Canon Inc | Picture reader |
US4329717A (en) * | 1980-02-11 | 1982-05-11 | Exxon Research & Engineering Co. | Facsimile method and apparatus for setting white level |
US4408231A (en) * | 1981-07-31 | 1983-10-04 | International Business Machines Corporation | Method and apparatus for calibrating a linear array scanning system |
US4486781A (en) * | 1982-04-19 | 1984-12-04 | Xerox Corporation | Video signal white level corrector |
US4623934A (en) * | 1983-11-16 | 1986-11-18 | Rockwell International Corporation | AGC update apparatus and method of using same |
JPS60216667A (ja) * | 1984-04-11 | 1985-10-30 | Sharp Corp | 画像読取装置のccdセンサ出力回路 |
JPS6153868A (ja) * | 1984-08-24 | 1986-03-17 | Dainippon Screen Mfg Co Ltd | 画像走査信号処理におけるキャリブレーション装置 |
JPS61136377A (ja) * | 1984-12-06 | 1986-06-24 | Ricoh Co Ltd | スキヤナ−装置 |
JPS62293384A (ja) * | 1986-06-11 | 1987-12-19 | Toshiba Corp | 画像入力装置 |
JPH0834543B2 (ja) * | 1986-06-30 | 1996-03-29 | 株式会社リコー | スキャナ |
JPH06101791B2 (ja) * | 1986-08-15 | 1994-12-12 | コニカ株式会社 | ノイズの影響を防止したシエ−デイング補正方法及びその装置 |
-
1988
- 1988-10-27 US US07/263,461 patent/US5267053A/en not_active Expired - Lifetime
-
1989
- 1989-10-25 DE DE68916011T patent/DE68916011T2/de not_active Expired - Fee Related
- 1989-10-25 WO PCT/US1989/004802 patent/WO1990004900A1/en active IP Right Grant
- 1989-10-25 JP JP1511605A patent/JPH03501916A/ja active Pending
- 1989-10-25 EP EP89912601A patent/EP0396708B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5267053A (en) | 1993-11-30 |
EP0396708B1 (de) | 1994-06-08 |
JPH03501916A (ja) | 1991-04-25 |
EP0396708A1 (de) | 1990-11-14 |
DE68916011D1 (de) | 1994-07-14 |
WO1990004900A1 (en) | 1990-05-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: NEXPRESS SOLUTIONS LLC, ROCHESTER, N.Y., US |
|
8328 | Change in the person/name/address of the agent |
Free format text: FEY, H., DIPL.-PHYS., PAT.-ANW., 69115 HEIDELBERG |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: EASTMAN KODAK CO., ROCHESTER, N.Y., US |
|
8328 | Change in the person/name/address of the agent |
Representative=s name: LAUERWALD, J., DIPL.-PHYS., PAT.-ANW., 24214 GETTO |
|
8339 | Ceased/non-payment of the annual fee |