GB2151876B - Shading correction in image reproducing system - Google Patents

Shading correction in image reproducing system

Info

Publication number
GB2151876B
GB2151876B GB08430654A GB8430654A GB2151876B GB 2151876 B GB2151876 B GB 2151876B GB 08430654 A GB08430654 A GB 08430654A GB 8430654 A GB8430654 A GB 8430654A GB 2151876 B GB2151876 B GB 2151876B
Authority
GB
United Kingdom
Prior art keywords
shading correction
reproducing system
image reproducing
image
shading
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
Application number
GB08430654A
Other languages
English (en)
Other versions
GB2151876A (en
GB8430654D0 (en
Inventor
Kunio Tomohisa
Kiyoshi Maeda
Masamichi Cho
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Dainippon Screen Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP58231083A external-priority patent/JPS60123159A/ja
Priority claimed from JP58231084A external-priority patent/JPS60123168A/ja
Application filed by Dainippon Screen Manufacturing Co Ltd filed Critical Dainippon Screen Manufacturing Co Ltd
Publication of GB8430654D0 publication Critical patent/GB8430654D0/en
Publication of GB2151876A publication Critical patent/GB2151876A/en
Application granted granted Critical
Publication of GB2151876B publication Critical patent/GB2151876B/en
Expired legal-status Critical Current

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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
    • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • H04N1/053—Detection, control or error compensation of scanning velocity or position in main scanning direction, e.g. synchronisation of line start or picture elements in a line
    • 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
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/113—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
    • H04N1/1135—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors for the main-scan only
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/0471—Detection of scanning velocity or position using dedicated detectors
    • H04N2201/04712—Detection of scanning velocity or position using dedicated detectors using unbroken arrays of detectors, i.e. detectors mounted on the same substrate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04734—Detecting at frequent intervals, e.g. once per line for sub-scan control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04744—Detection of scanning velocity or position by detecting the scanned beam or a reference beam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S331/00—Oscillators
    • Y10S331/02—Phase locked loop having lock indicating or detecting means

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
GB08430654A 1983-12-06 1984-12-05 Shading correction in image reproducing system Expired GB2151876B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58231083A JPS60123159A (ja) 1983-12-06 1983-12-06 画像走査装置におけるシエ−デイング補正方法
JP58231084A JPS60123168A (ja) 1983-12-06 1983-12-06 シエ−デイング補正方法

Publications (3)

Publication Number Publication Date
GB8430654D0 GB8430654D0 (en) 1985-01-16
GB2151876A GB2151876A (en) 1985-07-24
GB2151876B true GB2151876B (en) 1988-03-09

Family

ID=26529684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08430654A Expired GB2151876B (en) 1983-12-06 1984-12-05 Shading correction in image reproducing system

Country Status (3)

Country Link
US (1) US4691241A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3444581A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB2151876B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263574A (ja) * 1984-06-12 1985-12-27 Ricoh Co Ltd 画像読取装置
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
JPS61161869A (ja) * 1985-01-11 1986-07-22 Dainippon Screen Mfg Co Ltd 画像入力走査装置，複製記録走査装置における画素同期信号の発生方法とその装置
FR2593613B1 (fr) * 1985-11-29 1993-01-08 Ricoh Kk Ensemble, dispositif et appareil de deviation de faisceau pour imprimante
JPS62237865A (ja) * 1986-04-09 1987-10-17 Fuji Photo Film Co Ltd 光走査装置
JPS6313015A (ja) * 1986-07-04 1988-01-20 Hitachi Koki Co Ltd 光偏向装置のビ−ム位置制御装置
US4837588A (en) * 1987-05-08 1989-06-06 Ricoh Company, Ltd. Synchronizing signal generating system for laser scanner
US4962431A (en) * 1987-05-08 1990-10-09 Ricoh Company, Ltd. Synchronizing signal generating system for laser scanner
JPS6467073A (en) * 1987-09-07 1989-03-13 Fuji Photo Film Co Ltd Picture signal correcting method
US4872063A (en) * 1988-03-17 1989-10-03 Optum Corporation Method to increase scanning resolution using a synthetic aperture
EP0585962A1 (en) * 1988-05-18 1994-03-09 Fuji Photo Film Co., Ltd. Halftone gradation image signal generating apparatus
US5172248A (en) * 1988-05-18 1992-12-15 Fuji Photo Film Co., Ltd. Method for forming halftone screen and apparatus therefor
GB9008031D0 (en) * 1990-04-09 1990-06-06 Rank Brimar Ltd Projection systems
US5296703A (en) * 1992-04-01 1994-03-22 The Regents Of The University Of California Scanning confocal microscope using fluorescence detection
US5363363A (en) * 1992-10-16 1994-11-08 Eastman Kodak Company Apparatus and method for laser noise cancellation in an optical storage system using a front facet monitor signal
JPH06339082A (ja) * 1993-05-28 1994-12-06 Canon Inc 光電変換装置
JP4532058B2 (ja) * 2002-08-26 2010-08-25 日本発條株式会社 修正方法、修正装置及び修正プログラム

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353299A1 (de) * 1972-12-18 1974-06-27 Ibm Kompensationsschaltung
US3835249A (en) * 1972-12-26 1974-09-10 Ibm Scanning light synchronization system
US3984629A (en) * 1974-12-23 1976-10-05 Rca Corporation Flying spot scanner unaffected by ambient light
US4000368A (en) * 1975-08-04 1976-12-28 Dacom, Inc. Nonuniform clock generator for document reproduction apparatus
JPS5765060A (en) * 1980-10-09 1982-04-20 Fuji Photo Film Co Ltd Method and device for laser recording
JPS5819187A (ja) * 1981-07-27 1983-02-04 Shinko Electric Co Ltd 電動機の制御回路
JPS5827466A (ja) * 1981-08-11 1983-02-18 Konishiroku Photo Ind Co Ltd シエ−デイング補正装置
US4518998A (en) * 1982-06-03 1985-05-21 Klimsch/Optronics, Inc. Method and apparatus for producing a time advanced output pulse train from an input pulse train

Also Published As

Publication number Publication date
GB2151876A (en) 1985-07-24
DE3444581C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-03-31
DE3444581A1 (de) 1985-06-20
GB8430654D0 (en) 1985-01-16
US4691241A (en) 1987-09-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19981205