JPH0219668B2 - - Google Patents

Info

Publication number
JPH0219668B2
JPH0219668B2 JP55151477A JP15147780A JPH0219668B2 JP H0219668 B2 JPH0219668 B2 JP H0219668B2 JP 55151477 A JP55151477 A JP 55151477A JP 15147780 A JP15147780 A JP 15147780A JP H0219668 B2 JPH0219668 B2 JP H0219668B2
Authority
JP
Japan
Prior art keywords
pixel
density
electrostatic latent
fine
gradation
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.)
Expired - Lifetime
Application number
JP55151477A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5776559A (en
Inventor
Naoto Kawamura
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 JP55151477A priority Critical patent/JPS5776559A/ja
Publication of JPS5776559A publication Critical patent/JPS5776559A/ja
Priority to US06/583,294 priority patent/US4491875A/en
Publication of JPH0219668B2 publication Critical patent/JPH0219668B2/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
    • H04N1/40—Picture signal circuits
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • 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
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4057—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
JP55151477A 1980-10-30 1980-10-30 Processing method of intermediate tone image Granted JPS5776559A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55151477A JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image
US06/583,294 US4491875A (en) 1980-10-30 1984-02-28 Apparatus and method for tonal image processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151477A JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image

Publications (2)

Publication Number Publication Date
JPS5776559A JPS5776559A (en) 1982-05-13
JPH0219668B2 true JPH0219668B2 (sv) 1990-05-02

Family

ID=15519358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151477A Granted JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image

Country Status (1)

Country Link
JP (1) JPS5776559A (sv)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639185B2 (ja) * 1983-07-15 1994-05-25 キヤノン株式会社 カラー画像再現方法
JPS6031167A (ja) * 1983-08-01 1985-02-16 Canon Inc 画像記録方法
US4558370A (en) * 1983-11-21 1985-12-10 International Business Machines Corporation Image processing method for graphics images
JPH0619627B2 (ja) * 1984-03-15 1994-03-16 コニカ株式会社 画像記録装置
JPH0738677B2 (ja) * 1984-05-07 1995-04-26 株式会社東芝 画像形成装置
JPS60234857A (ja) * 1984-05-07 1985-11-21 Toshiba Corp 記録装置
JP2698080B2 (ja) * 1987-10-16 1998-01-19 株式会社リコー 画像転写装置
US4868587A (en) * 1988-05-20 1989-09-19 Xerox Corporation Image halftoning system for printers
US5221971A (en) * 1990-11-21 1993-06-22 Polaroid Corporation Area modulation printing apparatus
US5170261A (en) * 1990-11-21 1992-12-08 Polaroid Corporation Printing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583066A (en) * 1978-12-17 1980-06-23 Ricoh Co Ltd Function generator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583066A (en) * 1978-12-17 1980-06-23 Ricoh Co Ltd Function generator

Also Published As

Publication number Publication date
JPS5776559A (en) 1982-05-13

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