JPS57167027A - Method and apparatus for correction for image quality in simulation of printed matter - Google Patents

Method and apparatus for correction for image quality in simulation of printed matter

Info

Publication number
JPS57167027A
JPS57167027A JP5222081A JP5222081A JPS57167027A JP S57167027 A JPS57167027 A JP S57167027A JP 5222081 A JP5222081 A JP 5222081A JP 5222081 A JP5222081 A JP 5222081A JP S57167027 A JPS57167027 A JP S57167027A
Authority
JP
Japan
Prior art keywords
color
signals
correction
circuits
simulation
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
JP5222081A
Other languages
Japanese (ja)
Other versions
JPH0145271B2 (en
Inventor
Kisaburo Shimura
Tetsuji Yarita
Hironobu Suda
Koji Kobayashi
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.)
Hitachi Denshi KK
Toppan Inc
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK, Toppan Printing Co Ltd filed Critical Hitachi Denshi KK
Priority to JP5222081A priority Critical patent/JPS57167027A/en
Publication of JPS57167027A publication Critical patent/JPS57167027A/en
Publication of JPH0145271B2 publication Critical patent/JPH0145271B2/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)
  • Color Image Communication Systems (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To achieve color correction possible for preferable approximation, even in case the background color removing factor is comparatively high by correcting the amount of color on a color monitor to be removed in a few rate. CONSTITUTION:Input signals Y, M, C, K are introduced to secondary color detection circuits 11-13 related to the colors, black x primary color detecting circuits 14-16, a ternary color detecting circuit 17, black x secondary color detecting circuits 18-20, and a quartic color detection circuit 21, and signals of colors for overlapping are inputted to duplicated correction circuits 31-40 and color correction circuits 51-54 and added to the original signals Y, M, C and K. Since the original signals Y, M, C and K are inverted signals and signals -D, -E,...-Z are non-inverted signals, the amount of color for overlapping corresponding is reduced with a few rate by multiplying correction factors -d,e...z with the signals and adding them to the original signals. Thus, even if the background color removing rate is comparatively high, the color correction possible with preferable approximation can be achieved.
JP5222081A 1981-04-07 1981-04-07 Method and apparatus for correction for image quality in simulation of printed matter Granted JPS57167027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5222081A JPS57167027A (en) 1981-04-07 1981-04-07 Method and apparatus for correction for image quality in simulation of printed matter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5222081A JPS57167027A (en) 1981-04-07 1981-04-07 Method and apparatus for correction for image quality in simulation of printed matter

Publications (2)

Publication Number Publication Date
JPS57167027A true JPS57167027A (en) 1982-10-14
JPH0145271B2 JPH0145271B2 (en) 1989-10-03

Family

ID=12908660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5222081A Granted JPS57167027A (en) 1981-04-07 1981-04-07 Method and apparatus for correction for image quality in simulation of printed matter

Country Status (1)

Country Link
JP (1) JPS57167027A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5349503A (en) * 1976-10-18 1978-05-06 Dainippon Screen Mfg Reproduced color indicating method and calculating device for reproduced color indicating apparatus for multiicolor printed matters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5349503A (en) * 1976-10-18 1978-05-06 Dainippon Screen Mfg Reproduced color indicating method and calculating device for reproduced color indicating apparatus for multiicolor printed matters

Also Published As

Publication number Publication date
JPH0145271B2 (en) 1989-10-03

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