GB2080655B - Lithographic reproduction original classification and colour separation tone curve adjustment - Google Patents

Lithographic reproduction original classification and colour separation tone curve adjustment

Info

Publication number
GB2080655B
GB2080655B GB8120484A GB8120484A GB2080655B GB 2080655 B GB2080655 B GB 2080655B GB 8120484 A GB8120484 A GB 8120484A GB 8120484 A GB8120484 A GB 8120484A GB 2080655 B GB2080655 B GB 2080655B
Authority
GB
United Kingdom
Prior art keywords
tone curve
curve adjustment
colour separation
original classification
reproduction 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
Application number
GB8120484A
Other languages
English (en)
Other versions
GB2080655A (en
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.)
DIC Corp
Original Assignee
Dainippon Ink and Chemicals 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 Dainippon Ink and Chemicals Co Ltd filed Critical Dainippon Ink and Chemicals Co Ltd
Publication of GB2080655A publication Critical patent/GB2080655A/en
Application granted granted Critical
Publication of GB2080655B publication Critical patent/GB2080655B/en
Expired 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
    • H04N1/6027—Correction or control of colour gradation or colour contrast
    • 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
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Spectrometry And Color Measurement (AREA)
GB8120484A 1980-07-02 1981-07-02 Lithographic reproduction original classification and colour separation tone curve adjustment Expired GB2080655B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8908980A JPS5714840A (en) 1980-07-02 1980-07-02 Setting up method for automatic color separating machine

Publications (2)

Publication Number Publication Date
GB2080655A GB2080655A (en) 1982-02-03
GB2080655B true GB2080655B (en) 1984-03-14

Family

ID=13961141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8120484A Expired GB2080655B (en) 1980-07-02 1981-07-02 Lithographic reproduction original classification and colour separation tone curve adjustment

Country Status (5)

Country Link
JP (1) JPS5714840A (enrdf_load_stackoverflow)
DE (1) DE3126165A1 (enrdf_load_stackoverflow)
FR (1) FR2486261A1 (enrdf_load_stackoverflow)
GB (1) GB2080655B (enrdf_load_stackoverflow)
IT (1) IT1137684B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435538A1 (de) * 1984-09-27 1986-04-03 Robert 6000 Frankfurt Hanus Verfahren zur reproduktion von originalvorlagen
EP0352491B1 (en) * 1988-06-30 1996-08-14 Dainippon Screen Mfg. Co., Ltd. Method of generating gradation correction curve for correcting gradation character of image
JPH0646255A (ja) * 1992-07-23 1994-02-18 Fuji Xerox Co Ltd 画像処理装置
JP3050099B2 (ja) * 1995-09-01 2000-06-05 株式会社村田製作所 誘電体フィルタおよびアンテナデュプレクサ
DE19751464C2 (de) * 1997-11-20 1999-08-26 Agfa Gevaert Ag Vorrichtung und Verfahren zum Erzeugen von Empfindlichkeitswerten

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1921460C2 (de) * 1969-04-26 1970-12-23 Scheuter Dipl Ing Karl R Einrichtung zur Messung des Informationsgehaltes eines Bildes sowie der Druckguete einer Reproduktion
US3893166A (en) * 1972-01-05 1975-07-01 Crosfield Electronics Ltd Colour correcting image reproducing methods and apparatus
GB1566263A (en) * 1975-09-22 1980-04-30 Toppan Printing Co Ltd Measuring optical characteristic

Also Published As

Publication number Publication date
IT8122709A0 (it) 1981-07-02
IT1137684B (it) 1986-09-10
JPS5714840A (en) 1982-01-26
GB2080655A (en) 1982-02-03
FR2486261B1 (enrdf_load_stackoverflow) 1984-05-25
FR2486261A1 (fr) 1982-01-08
DE3126165A1 (de) 1982-03-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee