HK66792A - Exposure control system for continuous tone electrophotographic film - Google Patents

Exposure control system for continuous tone electrophotographic film

Info

Publication number
HK66792A
HK66792A HK667/92A HK66792A HK66792A HK 66792 A HK66792 A HK 66792A HK 667/92 A HK667/92 A HK 667/92A HK 66792 A HK66792 A HK 66792A HK 66792 A HK66792 A HK 66792A
Authority
HK
Hong Kong
Prior art keywords
control system
exposure control
continuous tone
electrophotographic film
tone electrophotographic
Prior art date
Application number
HK667/92A
Other languages
English (en)
Inventor
Denny Lap Yen Lee
Original Assignee
Du Pont
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
Application filed by Du Pont filed Critical Du Pont
Publication of HK66792A publication Critical patent/HK66792A/xx

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/04Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/50Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5062Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the characteristics of an image on the copy material
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/22Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/32Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
    • G03G15/326Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by application of light, e.g. using a LED array
    • G03G15/328Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by application of light, e.g. using a LED array using a CRT
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/128Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers generating or processing printable items, e.g. characters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • H04N1/407Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4076Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • H04N1/407Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4076Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
    • H04N1/4078Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture using gradational references, e.g. grey-scale test pattern analysis

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Facsimile Image Signal Circuits (AREA)
HK667/92A 1986-11-25 1992-09-03 Exposure control system for continuous tone electrophotographic film HK66792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/934,802 US4816863A (en) 1986-11-25 1986-11-25 Exposure control system for continuous tone electrophotographic film

Publications (1)

Publication Number Publication Date
HK66792A true HK66792A (en) 1992-09-11

Family

ID=25466088

Family Applications (1)

Application Number Title Priority Date Filing Date
HK667/92A HK66792A (en) 1986-11-25 1992-09-03 Exposure control system for continuous tone electrophotographic film

Country Status (9)

Country Link
US (1) US4816863A (de)
EP (1) EP0269033B1 (de)
JP (1) JPS63246768A (de)
KR (1) KR910004682B1 (de)
AU (1) AU600321B2 (de)
BR (1) BR8706312A (de)
CA (1) CA1295651C (de)
DE (1) DE3777098D1 (de)
HK (1) HK66792A (de)

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US5305057A (en) * 1991-07-05 1994-04-19 Minolta Camera Kabushiki Kaisha Image forming apparatus having correction means for modifying image density signals according to a gradation correction table
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US5255085A (en) * 1991-10-25 1993-10-19 Eastman Kodak Company Adaptive technique for providing accurate tone reproduction control in an imaging system
US5293539A (en) * 1991-10-25 1994-03-08 Eastman Kodak Company Method and apparatus for calibrating tone reproduction in a proofing system
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DE19641256C2 (de) * 1995-10-06 1999-04-01 Ricoh Kk Bilderzeugungseinrichtung
US5751470A (en) * 1996-03-12 1998-05-12 Lexmark International, Inc. Method for enhanced print quality on print engines with at least one high resolution dimension
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JPH10301370A (ja) * 1997-04-28 1998-11-13 Nec Niigata Ltd 電子写真装置
EP1027679B1 (de) 1997-11-03 2003-04-23 Kodak Polychrome Graphics LLC Verfahren und vorrichtung zur kalibrierung eines bilderzeugungsgeräts mit mehreren bildausgängen
US6356291B1 (en) 1998-11-06 2002-03-12 International Business Machines Corp. Method and apparatus for providing print quality enhancement
US6560418B2 (en) 2001-03-09 2003-05-06 Lexmark International, Inc. Method of setting laser power and developer bias in a multi-color electrophotographic machinie
JP3782689B2 (ja) * 2001-08-09 2006-06-07 シャープ株式会社 画像形成装置および画像形成方法
US6937775B2 (en) * 2002-05-15 2005-08-30 Eastman Kodak Company Method of enhancing the tone scale of a digital image to extend the linear response range without amplifying noise
US6871932B2 (en) * 2002-07-09 2005-03-29 Agfa-Gevaert Quality assessment of hard copy recorders
EP1381219A1 (de) * 2002-07-09 2004-01-14 Agfa-Gevaert Bewertung der Qualität von Druckern
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Also Published As

Publication number Publication date
KR910004682B1 (ko) 1991-07-09
US4816863A (en) 1989-03-28
AU8165287A (en) 1988-06-02
KR880006577A (ko) 1988-07-23
CA1295651C (en) 1992-02-11
JPS63246768A (ja) 1988-10-13
AU600321B2 (en) 1990-08-09
EP0269033A2 (de) 1988-06-01
EP0269033B1 (de) 1992-03-04
EP0269033A3 (en) 1989-01-18
DE3777098D1 (de) 1992-04-09
BR8706312A (pt) 1988-07-19

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