JPS5638058A - Image comtrolling method - Google Patents

Image comtrolling method

Info

Publication number
JPS5638058A
JPS5638058A JP11125479A JP11125479A JPS5638058A JP S5638058 A JPS5638058 A JP S5638058A JP 11125479 A JP11125479 A JP 11125479A JP 11125479 A JP11125479 A JP 11125479A JP S5638058 A JPS5638058 A JP S5638058A
Authority
JP
Japan
Prior art keywords
contrast
image
accordance
switches
sensor
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.)
Pending
Application number
JP11125479A
Other languages
Japanese (ja)
Inventor
Takeshi Watanabe
Ikuo Soma
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP11125479A priority Critical patent/JPS5638058A/en
Publication of JPS5638058A publication Critical patent/JPS5638058A/en
Pending legal-status Critical Current

Links

Landscapes

  • Holders For Sensitive Materials And Originals (AREA)
  • Developing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To obtain a halftone image of high reproductivity by classifying original contrast into at least 3 kinds of low, medium, and high contrasts, and controlling exposure in accordance with a desired contrast.
CONSTITUTION: Three kinds of switches for high, medium and low contrast switches are provided in an image controller in order to select a copy image in accordance with the contrast of an original. In addition, said image controller is provided with sensor 10 for detecting surface potential of photoreceptor 1, amplifier 11 for amplifying said surface potential, operation control circuit 12, sensor 10, etc. Circuit 12 produces output signals for controlling development bias in reply to the sensor signals, and these bias controlling signals are adjusted with change-over means 14 including said change-over switches so as to apply adequate bias in accordance with the given contrast and to control exposure.
COPYRIGHT: (C)1981,JPO&Japio
JP11125479A 1979-08-31 1979-08-31 Image comtrolling method Pending JPS5638058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11125479A JPS5638058A (en) 1979-08-31 1979-08-31 Image comtrolling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11125479A JPS5638058A (en) 1979-08-31 1979-08-31 Image comtrolling method

Publications (1)

Publication Number Publication Date
JPS5638058A true JPS5638058A (en) 1981-04-13

Family

ID=14556514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11125479A Pending JPS5638058A (en) 1979-08-31 1979-08-31 Image comtrolling method

Country Status (1)

Country Link
JP (1) JPS5638058A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60218672A (en) * 1984-04-16 1985-11-01 Ricoh Co Ltd Copying device
JPS6311631U (en) * 1986-07-09 1988-01-26
JP2008155927A (en) * 2006-12-21 2008-07-10 Hisaka Works Ltd Tray used for sterilizing processing of plastic container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60218672A (en) * 1984-04-16 1985-11-01 Ricoh Co Ltd Copying device
JPS6311631U (en) * 1986-07-09 1988-01-26
JP2008155927A (en) * 2006-12-21 2008-07-10 Hisaka Works Ltd Tray used for sterilizing processing of plastic container

Similar Documents

Publication Publication Date Title
JPS5689751A (en) Copying machine of automatically controlling picture quality
JPS55146451A (en) Sharpness emphasis method in image scanning recorder
JPS5252634A (en) Half tone recording process
EP0292732A3 (en) Halftone dot generator and generating method
JPS5443026A (en) Method and apparatus foe electrophotography
ES8303861A1 (en) Method and device for sequentially imaging an original
JPS5638058A (en) Image comtrolling method
JPS5651742A (en) Color separation image forming apparatus
JPS5776562A (en) Electrophotographic cpier
JPS5399949A (en) Latent image recording method for magnetic printer
JPS5287024A (en) Recording means for chiaroscuro image
JPS5655257A (en) Scanning type plate making device
JPS5550795A (en) Rbg chroma key signal generator
JPS5454626A (en) Recognizing method for pattern on original document
JPS5764488A (en) Laser working device
JPS5356921A (en) Exposure control system for television caemra
JPS5672467A (en) Development bias control method
JPS5412518A (en) Scanning velocity modulating circuit
JPS53120533A (en) Copier by means of laser
JPS5666867A (en) Copying apparatus
JPS5288010A (en) Recording level setting apparatus for fm signal
JPS54113350A (en) Laser recorder
JPS5510638A (en) Pattern selective scanning method
JPS52101926A (en) Control method for recording medium near end signal
JPS52117570A (en) Position detecting method