JPS57198463A - Correcting method for color of color printer - Google Patents

Correcting method for color of color printer

Info

Publication number
JPS57198463A
JPS57198463A JP56084713A JP8471381A JPS57198463A JP S57198463 A JPS57198463 A JP S57198463A JP 56084713 A JP56084713 A JP 56084713A JP 8471381 A JP8471381 A JP 8471381A JP S57198463 A JPS57198463 A JP S57198463A
Authority
JP
Japan
Prior art keywords
color
coeffts
separating
determined
image
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
JP56084713A
Other languages
Japanese (ja)
Inventor
Susumu Sugiura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56084713A priority Critical patent/JPS57198463A/en
Publication of JPS57198463A publication Critical patent/JPS57198463A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE:To correct easily and efficiently the colors of a color printer by color- separating a prined pattern with prescribed hues and densities and processing the resulting density data by the method of least squares to obtain masking coeffts. CONSTITUTION:In equationI(where Ci, Mi and Yi are prescribed density patterns of cyan, magenta and yellow, respectively (i is a value representing the dot rate, e.g., 1-10), and DRi, DGi and DBi are density values obtd. by color-separating said density patterns, respectively), coeffts. a11-a33 are determined by the method of least squares. The coeffts. (a11-a13) of a cyan image are first determined by solving simultaneous equations II (where SIGMA means equation III), and the coeffts. (a21-a23) of a magneta image and the coeffts. (a31-a33) of a yellow image are similarly determined. Data DRi, DGi, DBi obtd. by color-separating an original are then subjected to operation according to equationI, and colors are printed using inks by amounts corresponding to the resulting Ci, Mi and Yi.
JP56084713A 1981-06-01 1981-06-01 Correcting method for color of color printer Pending JPS57198463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56084713A JPS57198463A (en) 1981-06-01 1981-06-01 Correcting method for color of color printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084713A JPS57198463A (en) 1981-06-01 1981-06-01 Correcting method for color of color printer

Publications (1)

Publication Number Publication Date
JPS57198463A true JPS57198463A (en) 1982-12-06

Family

ID=13838300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084713A Pending JPS57198463A (en) 1981-06-01 1981-06-01 Correcting method for color of color printer

Country Status (1)

Country Link
JP (1) JPS57198463A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176980A (en) * 1983-03-08 1984-10-06 Canon Inc Picture processing method
JPS60109968A (en) * 1983-11-18 1985-06-15 Canon Inc Color recording system
JPS60132463A (en) * 1983-12-21 1985-07-15 Canon Inc Color printer
JPS60216352A (en) * 1984-04-12 1985-10-29 Fuji Photo Film Co Ltd Automatic setting method of color correction condition
JPS61261971A (en) * 1985-05-15 1986-11-20 Ricoh Co Ltd Color correcting method
JPS63184469A (en) * 1987-01-27 1988-07-29 Canon Inc Color picture reader
JPS63184468A (en) * 1987-01-27 1988-07-29 Canon Inc Color image forming device
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
US4970584A (en) * 1985-05-15 1990-11-13 Ricoh Company, Ltd. Method and apparatus for the compensation of color detection
JPH03244292A (en) * 1990-02-22 1991-10-31 Victor Co Of Japan Ltd Chrominance signal processing method
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 (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176980A (en) * 1983-03-08 1984-10-06 Canon Inc Picture processing method
JPS60109968A (en) * 1983-11-18 1985-06-15 Canon Inc Color recording system
JPS60132463A (en) * 1983-12-21 1985-07-15 Canon Inc Color printer
JPS60216352A (en) * 1984-04-12 1985-10-29 Fuji Photo Film Co Ltd Automatic setting method of color correction condition
JPH056827B2 (en) * 1984-04-12 1993-01-27 Fuji Photo Film Co Ltd
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
JPS61261971A (en) * 1985-05-15 1986-11-20 Ricoh Co Ltd Color correcting method
US4970584A (en) * 1985-05-15 1990-11-13 Ricoh Company, Ltd. Method and apparatus for the compensation of color detection
JPS63184469A (en) * 1987-01-27 1988-07-29 Canon Inc Color picture reader
JPS63184468A (en) * 1987-01-27 1988-07-29 Canon Inc Color image forming device
JPH03244292A (en) * 1990-02-22 1991-10-31 Victor Co Of Japan Ltd Chrominance signal processing method
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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