JPS648045A - Digital color image processing method - Google Patents

Digital color image processing method

Info

Publication number
JPS648045A
JPS648045A JP62163589A JP16358987A JPS648045A JP S648045 A JPS648045 A JP S648045A JP 62163589 A JP62163589 A JP 62163589A JP 16358987 A JP16358987 A JP 16358987A JP S648045 A JPS648045 A JP S648045A
Authority
JP
Japan
Prior art keywords
processing
area
signal
processed
pattern
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
JP62163589A
Other languages
Japanese (ja)
Inventor
Masaaki Kogure
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.)
Ricoh Co Ltd
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 JP62163589A priority Critical patent/JPS648045A/en
Publication of JPS648045A publication Critical patent/JPS648045A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE:To prevent hue fading and maintain high quality by processing a pattern of halftone density based on black color after UCR processing (removal of a foundation color) in such a manner that a maximum area percentage may be less than 100%. CONSTITUTION:In a signal processing system, a signal after UCR processing is processed by means of an X0.95 conversion processing circuit 21, and then the processed signal is allowed to be output to a density pattern processing circuit 15. The X0.95 conversion processing circuit 21 is provided, and an area exceeding 90% of coverage as yellow Y, magenta M and cyan C is not to be used in a pattern of black area scale after UCR processing. A black signal after UCR processing is processed for conversion so that 100% of the area percentage may not be provided and the maximum area percentage be limited to about 90% with the remaining percentage maintained as a blank area. This blank area keeps residual sticking toner colors such as yellow Y, magenta M and cyan C, thus being able to express tones of delicate hue.
JP62163589A 1987-06-30 1987-06-30 Digital color image processing method Pending JPS648045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62163589A JPS648045A (en) 1987-06-30 1987-06-30 Digital color image processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62163589A JPS648045A (en) 1987-06-30 1987-06-30 Digital color image processing method

Publications (1)

Publication Number Publication Date
JPS648045A true JPS648045A (en) 1989-01-12

Family

ID=15776789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62163589A Pending JPS648045A (en) 1987-06-30 1987-06-30 Digital color image processing method

Country Status (1)

Country Link
JP (1) JPS648045A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8374265B2 (en) 2008-02-04 2013-02-12 Nec Corporation Signal processing circuit, signal processing method and recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8374265B2 (en) 2008-02-04 2013-02-12 Nec Corporation Signal processing circuit, signal processing method and recording medium

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