JPS57198463A - Correcting method for color of color printer - Google Patents
Correcting method for color of color printerInfo
- 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
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.
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)
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 |
JPS63184468A (en) * | 1987-01-27 | 1988-07-29 | Canon Inc | Color image forming device |
JPS63184469A (en) * | 1987-01-27 | 1988-07-29 | Canon Inc | Color picture reader |
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 |
-
1981
- 1981-06-01 JP JP56084713A patent/JPS57198463A/en active Pending
Cited By (12)
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 |
JPS63184468A (en) * | 1987-01-27 | 1988-07-29 | Canon Inc | Color image forming device |
JPS63184469A (en) * | 1987-01-27 | 1988-07-29 | Canon Inc | Color picture reader |
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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