DE69513385T2 - Verfahren und Gerät zur Korrektur der Ausgangssignalen mehreren Photodetektoren - Google Patents
Verfahren und Gerät zur Korrektur der Ausgangssignalen mehreren PhotodetektorenInfo
- Publication number
- DE69513385T2 DE69513385T2 DE69513385T DE69513385T DE69513385T2 DE 69513385 T2 DE69513385 T2 DE 69513385T2 DE 69513385 T DE69513385 T DE 69513385T DE 69513385 T DE69513385 T DE 69513385T DE 69513385 T2 DE69513385 T2 DE 69513385T2
- Authority
- DE
- Germany
- Prior art keywords
- correcting
- output signals
- several photodetectors
- photodetectors
- several
- 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 - Lifetime
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95201376A EP0744862B1 (de) | 1995-05-24 | 1995-05-24 | Verfahren und Gerät zur Korrektur der Ausgangssignalen mehreren Photodetektoren |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69513385D1 DE69513385D1 (de) | 1999-12-23 |
DE69513385T2 true DE69513385T2 (de) | 2000-06-08 |
Family
ID=8220325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69513385T Expired - Lifetime DE69513385T2 (de) | 1995-05-24 | 1995-05-24 | Verfahren und Gerät zur Korrektur der Ausgangssignalen mehreren Photodetektoren |
Country Status (6)
Country | Link |
---|---|
US (1) | US5798847A (de) |
EP (1) | EP0744862B1 (de) |
JP (1) | JP3494807B2 (de) |
KR (2) | KR960043745A (de) |
DE (1) | DE69513385T2 (de) |
TW (1) | TW274672B (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7304670B1 (en) * | 1997-03-28 | 2007-12-04 | Hand Held Products, Inc. | Method and apparatus for compensating for fixed pattern noise in an imaging system |
US7324143B1 (en) | 1999-04-13 | 2008-01-29 | Rochester Institute Of Technology | Method and system for reducing noise in a digital image and apparatus thereof |
AU4079800A (en) * | 1999-04-13 | 2000-11-14 | Rochester Institute Of Technology | Method and system for reducing noise in a digital image and apparatus thereof |
TW420937B (en) * | 1999-05-06 | 2001-02-01 | Umax Data Systems Inc | Dynamic calibration method |
US6618173B1 (en) * | 1999-10-07 | 2003-09-09 | Hewlett-Packard Development Company, Lp. | Method for automatic prevention of vertical streaks by selectively applying gains to the output signals of optical sensor elements |
US6518587B2 (en) * | 2000-05-17 | 2003-02-11 | Heidelberger Druckmaschinen Ag | Detection and correction of defects from scanner calibration references |
US6996288B2 (en) * | 2000-09-28 | 2006-02-07 | Gang Sun | Method of calculating shading correction coefficients of imaging systems from non-uniform and unknown calibration standards |
US6822766B2 (en) * | 2001-03-01 | 2004-11-23 | Hewlett-Packard Development Company, L.P. | Correction for debris and low output photosensors in scroll fed scanner using stored initial calibration data |
JP3824927B2 (ja) * | 2001-06-22 | 2006-09-20 | 株式会社リコー | 読取装置、画像形成装置、通信装置および異常画素データ取得方法 |
US6660989B2 (en) * | 2001-07-11 | 2003-12-09 | Texas Instruments Incorporated | CMOS imager having asynchronous pixel readout in order of pixel illumination |
US7535501B1 (en) * | 2004-10-12 | 2009-05-19 | Lifetouch, Inc. | Testing of digital cameras |
US7763918B1 (en) | 2004-12-02 | 2010-07-27 | Chen Feng | Image pixel design to enhance the uniformity of intensity distribution on digital image sensors |
US7564629B1 (en) | 2004-12-02 | 2009-07-21 | Crosstek Capital, LLC | Microlens alignment procedures in CMOS image sensor design |
US7450161B1 (en) * | 2004-12-02 | 2008-11-11 | Magnachip Semiconductor Ltd. | System and method to enhance the uniformity of intensity distribution on digital imaging sensors |
US8109442B2 (en) | 2008-12-23 | 2012-02-07 | Gtech Corporation | Optical reader quality factor |
KR20160001422A (ko) | 2014-06-27 | 2016-01-06 | 정선영 | 발끝 치기 기능을 구비하는 발 및 다리 운동기구 |
US10136027B2 (en) | 2017-01-12 | 2018-11-20 | Kabushiki Kaisha Toshiba | Image reading apparatus with reference surface to generate reference data for shading correction, and related image forming apparatus and method |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57206171A (en) * | 1981-06-15 | 1982-12-17 | Ricoh Co Ltd | Shading compensating device |
JPS59125176A (ja) * | 1982-12-30 | 1984-07-19 | インタ−ナシヨナル ビジネス マシ−ンズ コ−ポレ−シヨン | ビデオイメ−ジのシエ−ジング効果の補正装置 |
JPS61151559A (ja) * | 1984-12-25 | 1986-07-10 | Canon Inc | 画像形成装置 |
IT1183983B (it) * | 1985-11-29 | 1987-10-22 | Elsag | Sistema di acquisizione ed elaborazione flessibile di immagini |
US4903145A (en) * | 1986-08-06 | 1990-02-20 | Canon Kabushiki Kaisha | Image quality control apparatus capable of density-correcting plural areas of different types |
US4888492A (en) * | 1987-03-03 | 1989-12-19 | Canon Kabushiki Kaisha | Image reading apparatus |
JPS63257374A (ja) * | 1987-04-14 | 1988-10-25 | Nec Corp | スキヤナの光学装置 |
JP2566611B2 (ja) | 1988-04-06 | 1996-12-25 | 大日本スクリーン製造 株式会社 | 平均最大値を利用したシェーディング補正用基準データの生成方法 |
JPH04181275A (ja) * | 1990-02-21 | 1992-06-29 | Ricoh Co Ltd | 画像形成装置 |
JPH03258163A (ja) * | 1990-03-08 | 1991-11-18 | Casio Comput Co Ltd | 画像データ処理方法 |
JPH04151778A (ja) * | 1990-10-16 | 1992-05-25 | Canon Inc | 画像読取装置 |
US5133022A (en) * | 1991-02-06 | 1992-07-21 | Recognition Equipment Incorporated | Normalizing correlator for video processing |
US5347370A (en) | 1992-12-28 | 1994-09-13 | Nisca Corporation | Shading correction method and apparatus |
JP3014252B2 (ja) * | 1993-09-16 | 2000-02-28 | 富士通株式会社 | 画像処理方法および画像処理装置 |
US5404232A (en) * | 1993-10-04 | 1995-04-04 | Xerox Corporation | Calibration system for a raster input scanner |
-
1995
- 1995-05-24 EP EP95201376A patent/EP0744862B1/de not_active Expired - Lifetime
- 1995-05-24 DE DE69513385T patent/DE69513385T2/de not_active Expired - Lifetime
- 1995-10-05 TW TW084110457A patent/TW274672B/zh active
-
1996
- 1996-05-22 JP JP12741396A patent/JP3494807B2/ja not_active Expired - Fee Related
- 1996-05-23 KR KR1019960017742A patent/KR960043745A/ko not_active Application Discontinuation
- 1996-05-24 US US08/653,347 patent/US5798847A/en not_active Expired - Lifetime
- 1996-05-30 KR KR1019960018853A patent/KR100408764B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69513385D1 (de) | 1999-12-23 |
KR100408764B1 (ko) | 2004-04-29 |
TW274672B (en) | 1996-04-21 |
JPH09120445A (ja) | 1997-05-06 |
EP0744862A1 (de) | 1996-11-27 |
JP3494807B2 (ja) | 2004-02-09 |
KR960042261A (ko) | 1996-12-21 |
EP0744862B1 (de) | 1999-11-17 |
US5798847A (en) | 1998-08-25 |
KR960043745A (ko) | 1996-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |