JPS56135842A - Method and apparatus for removing ground color - Google Patents

Method and apparatus for removing ground color

Info

Publication number
JPS56135842A
JPS56135842A JP3876080A JP3876080A JPS56135842A JP S56135842 A JPS56135842 A JP S56135842A JP 3876080 A JP3876080 A JP 3876080A JP 3876080 A JP3876080 A JP 3876080A JP S56135842 A JPS56135842 A JP S56135842A
Authority
JP
Japan
Prior art keywords
grayness
color
ink
signals
indian ink
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.)
Granted
Application number
JP3876080A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6250014B2 (enrdf_load_stackoverflow
Inventor
Toshihiro Shimizu
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.)
Toppan Inc
Original Assignee
Toppan Printing 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
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP3876080A priority Critical patent/JPS56135842A/ja
Publication of JPS56135842A publication Critical patent/JPS56135842A/ja
Publication of JPS6250014B2 publication Critical patent/JPS6250014B2/ja
Granted 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
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6016—Conversion to subtractive colour signals
    • H04N1/6022—Generating a fourth subtractive colour signal, e.g. under colour removal, black masking

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Color, Gradation (AREA)
  • Facsimile Scanning Arrangements (AREA)
JP3876080A 1980-03-26 1980-03-26 Method and apparatus for removing ground color Granted JPS56135842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3876080A JPS56135842A (en) 1980-03-26 1980-03-26 Method and apparatus for removing ground color

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3876080A JPS56135842A (en) 1980-03-26 1980-03-26 Method and apparatus for removing ground color

Publications (2)

Publication Number Publication Date
JPS56135842A true JPS56135842A (en) 1981-10-23
JPS6250014B2 JPS6250014B2 (enrdf_load_stackoverflow) 1987-10-22

Family

ID=12534233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3876080A Granted JPS56135842A (en) 1980-03-26 1980-03-26 Method and apparatus for removing ground color

Country Status (1)

Country Link
JP (1) JPS56135842A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622776A (ja) * 1985-06-28 1987-01-08 Toshiba Corp 多階調カラー画像記録方法
JPH01135648A (ja) * 1987-11-20 1989-05-29 Canon Inc 色信号処理方式
US5673335A (en) * 1992-08-26 1997-09-30 Canon Kabushiki Kaisha Color image processing method and apparatus therefor
US6088477A (en) * 1992-08-26 2000-07-11 Canon Kabushiki Kaisha System for controlling an amount of undercolor removal based on a grayness signal, a darkness signal, and a black signal
JP2006134068A (ja) * 2004-11-05 2006-05-25 Fuji Photo Film Co Ltd 色変換定義作成装置、および色変換定義作成プログラム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4985912A (enrdf_load_stackoverflow) * 1972-12-22 1974-08-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4985912A (enrdf_load_stackoverflow) * 1972-12-22 1974-08-17

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622776A (ja) * 1985-06-28 1987-01-08 Toshiba Corp 多階調カラー画像記録方法
JPH01135648A (ja) * 1987-11-20 1989-05-29 Canon Inc 色信号処理方式
US5673335A (en) * 1992-08-26 1997-09-30 Canon Kabushiki Kaisha Color image processing method and apparatus therefor
US6088477A (en) * 1992-08-26 2000-07-11 Canon Kabushiki Kaisha System for controlling an amount of undercolor removal based on a grayness signal, a darkness signal, and a black signal
JP2006134068A (ja) * 2004-11-05 2006-05-25 Fuji Photo Film Co Ltd 色変換定義作成装置、および色変換定義作成プログラム

Also Published As

Publication number Publication date
JPS6250014B2 (enrdf_load_stackoverflow) 1987-10-22

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