JPH01277062A - Color correction processing method - Google Patents

Color correction processing method

Info

Publication number
JPH01277062A
JPH01277062A JP63107018A JP10701888A JPH01277062A JP H01277062 A JPH01277062 A JP H01277062A JP 63107018 A JP63107018 A JP 63107018A JP 10701888 A JP10701888 A JP 10701888A JP H01277062 A JPH01277062 A JP H01277062A
Authority
JP
Japan
Prior art keywords
color
correction processing
color correction
recording density
processing parameter
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
JP63107018A
Other versions
JP2710782B2 (en
Inventor
Keitoku Ito
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP63107018A priority Critical patent/JP2710782B2/en
Publication of JPH01277062A publication Critical patent/JPH01277062A/en
Application granted granted Critical
Publication of JP2710782B2 publication Critical patent/JP2710782B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Abstract

PURPOSE: To convert a color with specific hue in an input picture to an achromatic color and to prevent the discontinuance of the gradation of an output picture from being generated by substituting the recording density of the achromatic color for the recording density corresponding to a chromatic color being used in the selection of a color correction processing parameter.
CONSTITUTION: Color spaces (Dr, Dg and Db) formed by the spectral density of the color to be recorded and rendered are divided by three or more planes extending in radial shape centering an achromatic color axis (Dr=Dg=Db), and processed. In such a case, the color correction processing of masking equation is decided at every color space (area) divided by the three or more planes in advance, and it is decided to which area the color to be processed belongs, and the color correction processing parameter is selected corresponding to a decided area. Next, the color to be processed is processed according to a selected color correction processing parameter. In such a case, by substituting the recording density to record the achromatic color for the recording density corresponding to at least one chromatic color out of the chromatic colors used in the decision of the color correction processing parameter of the divided color space, it is possible to prevent the gradation of the output picture from being discontinued.
COPYRIGHT: (C)1989,JPO&Japio
JP63107018A 1988-04-28 1988-04-28 Color correction processing method Expired - Fee Related JP2710782B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63107018A JP2710782B2 (en) 1988-04-28 1988-04-28 Color correction processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63107018A JP2710782B2 (en) 1988-04-28 1988-04-28 Color correction processing method

Publications (2)

Publication Number Publication Date
JPH01277062A true JPH01277062A (en) 1989-11-07
JP2710782B2 JP2710782B2 (en) 1998-02-10

Family

ID=14448426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63107018A Expired - Fee Related JP2710782B2 (en) 1988-04-28 1988-04-28 Color correction processing method

Country Status (1)

Country Link
JP (1) JP2710782B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985759A (en) * 1988-04-05 1991-01-15 Ricoh Company, Ltd. Method and apparatus for extracting black color component
US4989079A (en) * 1987-10-23 1991-01-29 Ricoh Company, Ltd. Color correction device and method having a hue area judgement unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989079A (en) * 1987-10-23 1991-01-29 Ricoh Company, Ltd. Color correction device and method having a hue area judgement unit
US4985759A (en) * 1988-04-05 1991-01-15 Ricoh Company, Ltd. Method and apparatus for extracting black color component

Also Published As

Publication number Publication date
JP2710782B2 (en) 1998-02-10

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