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JPH0456987B2 - - Google Patents
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JPH0456987B2 - - Google Patents

Info

Publication number
JPH0456987B2
JPH0456987B2 JP59029795A JP2979584A JPH0456987B2 JP H0456987 B2 JPH0456987 B2 JP H0456987B2 JP 59029795 A JP59029795 A JP 59029795A JP 2979584 A JP2979584 A JP 2979584A JP H0456987 B2 JPH0456987 B2 JP H0456987B2
Authority
JP
Japan
Prior art keywords
density
histogram
image
low
original
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
Application number
JP59029795A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60173566A (ja
Inventor
Masahiko Matsunawa
Yoshinori Abe
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP59029795A priority Critical patent/JPS60173566A/ja
Priority to EP85101854A priority patent/EP0162196B2/fr
Priority to DE8585101854T priority patent/DE3577362D1/de
Publication of JPS60173566A publication Critical patent/JPS60173566A/ja
Priority to US07/010,500 priority patent/US4733306A/en
Publication of JPH0456987B2 publication Critical patent/JPH0456987B2/ja
Granted legal-status Critical Current

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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5025—Machine 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 original characteristics, e.g. contrast, density
    • 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
    • G03G15/043—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 with means for controlling illumination or exposure
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
JP59029795A 1984-02-20 1984-02-20 複写装置 Granted JPS60173566A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59029795A JPS60173566A (ja) 1984-02-20 1984-02-20 複写装置
EP85101854A EP0162196B2 (fr) 1984-02-20 1985-02-20 Méthode pour déterminer la densité d'un original et pour le copier
DE8585101854T DE3577362D1 (de) 1984-02-20 1985-02-20 Verfahren zur feststellung der bilddichte einer vorlage und deren kopierung.
US07/010,500 US4733306A (en) 1984-02-20 1987-02-03 Methods of discriminating and copying an image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59029795A JPS60173566A (ja) 1984-02-20 1984-02-20 複写装置

Publications (2)

Publication Number Publication Date
JPS60173566A JPS60173566A (ja) 1985-09-06
JPH0456987B2 true JPH0456987B2 (fr) 1992-09-10

Family

ID=12285930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59029795A Granted JPS60173566A (ja) 1984-02-20 1984-02-20 複写装置

Country Status (1)

Country Link
JP (1) JPS60173566A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806980A (en) * 1986-11-06 1989-02-21 Eastman Kodak Company Dynamic feedforward process control for electrographic machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051105B2 (ja) * 1979-12-24 1985-11-12 株式会社東芝 自動画質制御複写機
JPS57151953A (en) * 1981-03-16 1982-09-20 Ricoh Co Ltd Controlling method for development bias voltage of copying machine
JPS57172365A (en) * 1981-04-17 1982-10-23 Ricoh Co Ltd Detection method for original density of copying machine
JPS58106570A (ja) * 1981-12-19 1983-06-24 Konishiroku Photo Ind Co Ltd 画像判別装置
JPS5915264A (ja) * 1982-07-19 1984-01-26 Konishiroku Photo Ind Co Ltd 複写機の画像制御装置

Also Published As

Publication number Publication date
JPS60173566A (ja) 1985-09-06

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