JPS5651742A - Color separation image forming apparatus - Google Patents

Color separation image forming apparatus

Info

Publication number
JPS5651742A
JPS5651742A JP12815079A JP12815079A JPS5651742A JP S5651742 A JPS5651742 A JP S5651742A JP 12815079 A JP12815079 A JP 12815079A JP 12815079 A JP12815079 A JP 12815079A JP S5651742 A JPS5651742 A JP S5651742A
Authority
JP
Japan
Prior art keywords
color
circuit
control circuit
image
adjusting
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
JP12815079A
Other languages
Japanese (ja)
Inventor
Ryoichi Yukikawa
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.)
ADS KK
EE D S KK
Original Assignee
ADS KK
EE D S KK
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 ADS KK, EE D S KK filed Critical ADS KK
Priority to JP12815079A priority Critical patent/JPS5651742A/en
Publication of JPS5651742A publication Critical patent/JPS5651742A/en
Pending legal-status Critical Current

Links

Landscapes

  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE: To improve the color balance of an image and make adjusting work easy by setting a range control circuit adjusting the contrast of the whole image and a tone control circuit correcting the color tone in common with every color.
CONSTITUTION: Range control circuit 45 is a circuit adjusting the contrast of the whole of an image and determines the range of density by fitting one point each of the light part (highlight) and the dark part (shadow) of an original to reference minimum level VH and reference maximum signal level VS of an amplifier for every color of yellow, magenta, cyan and black. Tone control circuit 46 is a circuit correcting the tones of the highlight, intermediate and shadow parts, and it is set behind color signal change-over circuit 44 together with circuit 45. Thus, circuit 45, 46 where many points are adjusted are made common to every color to improve the color balance and work efficiency.
COPYRIGHT: (C)1981,JPO&Japio
JP12815079A 1979-10-03 1979-10-03 Color separation image forming apparatus Pending JPS5651742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12815079A JPS5651742A (en) 1979-10-03 1979-10-03 Color separation image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12815079A JPS5651742A (en) 1979-10-03 1979-10-03 Color separation image forming apparatus

Publications (1)

Publication Number Publication Date
JPS5651742A true JPS5651742A (en) 1981-05-09

Family

ID=14977616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12815079A Pending JPS5651742A (en) 1979-10-03 1979-10-03 Color separation image forming apparatus

Country Status (1)

Country Link
JP (1) JPS5651742A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501302A (en) * 1981-08-10 1983-08-04 マイルズ、ア−ネスト　パ−シイ、ジユニア Digital facsimile (high speed additive color separation negative mile)
JPS58225774A (en) * 1982-06-23 1983-12-27 Matsushita Electric Ind Co Ltd Picture scanning and recording device
JPS5979674A (en) * 1982-10-28 1984-05-08 Toshiba Corp Color adhesion sensor
JPS59161982A (en) * 1983-03-06 1984-09-12 Canon Inc Picture processor
JPS59161970A (en) * 1983-03-06 1984-09-12 Canon Inc Picture processor
US4731662A (en) * 1985-03-21 1988-03-15 Canon Kabushiki Kaisha Image processing method for processing an image signal differently depending on the range of an image characteristic thereof relative to the range within which an output device can reproduce the image characteristic
JPS6368863A (en) * 1986-08-29 1988-03-28 アグファ−ゲ−ヴェルト・アクチエンゲゼルシャフト Method and apparatus for reproducing original
US4839721A (en) * 1984-08-28 1989-06-13 Polaroid Corporation Method of and apparatus for transforming color image data on the basis of an isotropic and uniform colorimetric space
US4908701A (en) * 1987-03-09 1990-03-13 Canon Kabushiki Kaisha Color image processing method and apparatus for color adjustment during image processing
US5677967A (en) * 1993-03-10 1997-10-14 R. R. Donnelley & Sons Company Method of and apparatus for converting between a color appearance space and a colorant space

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501302A (en) * 1981-08-10 1983-08-04 マイルズ、ア−ネスト　パ−シイ、ジユニア Digital facsimile (high speed additive color separation negative mile)
JPS58225774A (en) * 1982-06-23 1983-12-27 Matsushita Electric Ind Co Ltd Picture scanning and recording device
JPS5979674A (en) * 1982-10-28 1984-05-08 Toshiba Corp Color adhesion sensor
JPS59161982A (en) * 1983-03-06 1984-09-12 Canon Inc Picture processor
JPS59161970A (en) * 1983-03-06 1984-09-12 Canon Inc Picture processor
US4839721A (en) * 1984-08-28 1989-06-13 Polaroid Corporation Method of and apparatus for transforming color image data on the basis of an isotropic and uniform colorimetric space
US4731662A (en) * 1985-03-21 1988-03-15 Canon Kabushiki Kaisha Image processing method for processing an image signal differently depending on the range of an image characteristic thereof relative to the range within which an output device can reproduce the image characteristic
JPS6368863A (en) * 1986-08-29 1988-03-28 アグファ−ゲ−ヴェルト・アクチエンゲゼルシャフト Method and apparatus for reproducing original
US4908701A (en) * 1987-03-09 1990-03-13 Canon Kabushiki Kaisha Color image processing method and apparatus for color adjustment during image processing
US5677967A (en) * 1993-03-10 1997-10-14 R. R. Donnelley & Sons Company Method of and apparatus for converting between a color appearance space and a colorant space

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