JPS6250014B2 - - Google Patents

Info

Publication number
JPS6250014B2
JPS6250014B2 JP55038760A JP3876080A JPS6250014B2 JP S6250014 B2 JPS6250014 B2 JP S6250014B2 JP 55038760 A JP55038760 A JP 55038760A JP 3876080 A JP3876080 A JP 3876080A JP S6250014 B2 JPS6250014 B2 JP S6250014B2
Authority
JP
Japan
Prior art keywords
amount
signal
grayness
black
color
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
Application number
JP55038760A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56135842A (en
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 JPS56135842A (en) 1981-10-23
JPS6250014B2 true 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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0783423B2 (ja) * 1985-06-28 1995-09-06 株式会社東芝 多階調カラー画像記録方法
JP2987393B2 (ja) * 1987-11-20 1999-12-06 キヤノン株式会社 カラー画像処理方法
US5673335A (en) * 1992-08-26 1997-09-30 Canon Kabushiki Kaisha Color image processing method and apparatus therefor
JP3391816B2 (ja) * 1992-08-26 2003-03-31 キヤノン株式会社 カラー画像処理装置およびその方法
JP4619749B2 (ja) * 2004-11-05 2011-01-26 富士フイルム株式会社 色変換定義作成装置、および色変換定義作成プログラム

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648869B2 (enrdf_load_stackoverflow) * 1972-12-22 1981-11-18

Also Published As

Publication number Publication date
JPS56135842A (en) 1981-10-23

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