DE3885503T2 - Verfahren und Vorrichtung zur Erzeugung eines Zittermusters. - Google Patents

Verfahren und Vorrichtung zur Erzeugung eines Zittermusters.

Info

Publication number
DE3885503T2
DE3885503T2 DE3885503T DE3885503T DE3885503T2 DE 3885503 T2 DE3885503 T2 DE 3885503T2 DE 3885503 T DE3885503 T DE 3885503T DE 3885503 T DE3885503 T DE 3885503T DE 3885503 T2 DE3885503 T2 DE 3885503T2
Authority
DE
Germany
Prior art keywords
generating
dither pattern
dither
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.)
Expired - Fee Related
Application number
DE3885503T
Other languages
English (en)
Other versions
DE3885503D1 (de
Inventor
Douglas I Haines
Patrick E Welborn
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.)
Xerox Corp
Original Assignee
Tektronix 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 Tektronix Inc filed Critical Tektronix Inc
Publication of DE3885503D1 publication Critical patent/DE3885503D1/de
Application granted granted Critical
Publication of DE3885503T2 publication Critical patent/DE3885503T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/405—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
    • 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
    • H04N1/52—Circuits or arrangements for halftone screening

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Image Processing (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Ink Jet (AREA)
DE3885503T 1987-05-08 1988-05-06 Verfahren und Vorrichtung zur Erzeugung eines Zittermusters. Expired - Fee Related DE3885503T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/047,815 US4823189A (en) 1987-05-08 1987-05-08 Method and apparatus for creating a dither pattern

Publications (2)

Publication Number Publication Date
DE3885503D1 DE3885503D1 (de) 1993-12-16
DE3885503T2 true DE3885503T2 (de) 1994-05-19

Family

ID=21951132

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3885503T Expired - Fee Related DE3885503T2 (de) 1987-05-08 1988-05-06 Verfahren und Vorrichtung zur Erzeugung eines Zittermusters.

Country Status (4)

Country Link
US (1) US4823189A (de)
EP (1) EP0290282B1 (de)
JP (1) JPS6464849A (de)
DE (1) DE3885503T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68927970T2 (de) * 1988-09-08 1997-10-09 Canon Kk Punktbilddatenausgabegerät
US4977458A (en) * 1988-11-16 1990-12-11 Eastman Kodak Company Apparatus for addressing a font to suppress Moire patterns occurring thereby and a method for use therein
US4916545A (en) * 1988-11-16 1990-04-10 Eastman Kodak Company Electronic graphic arts screener that suppresses Moire patterns using pseudo-random font selection
US4933777A (en) * 1989-04-26 1990-06-12 Microtek Lab., Inc. Method of real-time converting analog video signal to digital half-tone data and converters thereof
US5053887A (en) * 1989-06-27 1991-10-01 Ibm Corporation Technique for producing a fine grained dithered halftone image having an increased number of gray levels
US5371515A (en) * 1989-09-28 1994-12-06 Sun Microsystems, Inc. Method and apparatus for non-linear dithering of digital images
US5341228A (en) * 1990-12-04 1994-08-23 Research Corporation Technologies Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
US5276535A (en) * 1991-12-24 1994-01-04 Levien Raphael L Method and apparatus for halftoning of images using grayscale error diffusion
US5331429A (en) * 1992-02-07 1994-07-19 Levien Raphael L Digital generation of halftone images with error diffusion and frequency matched periodic screen rulings
US5398297A (en) * 1992-07-27 1995-03-14 Tektronix, Inc. Improved color rendering method for intensity-variable printing based upon a dithering table
US5489991A (en) * 1992-10-09 1996-02-06 International Business Machines Corporation Method for generating digital halftone images
DE4331644A1 (de) * 1993-02-19 1994-08-25 Hell Ag Linotype Verfahren und Einrichtung zur Umwandlung von Halbtonwerten in Binärwerte
US5499305A (en) * 1994-03-30 1996-03-12 Lasermaster Corporation Method and apparatus for coalescing a grayscale image and rendering the coalesced grayscale image as a binary image

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032978A (en) * 1975-01-20 1977-06-28 International Business Machines Corporation Pseudo halftone print generator and method
JPS5563173A (en) * 1978-11-06 1980-05-13 Ricoh Co Ltd Picture signal processing system
JPS55142345A (en) * 1979-04-23 1980-11-06 Dainippon Screen Mfg Co Ltd Masking operation method in digital color tone control
US4491875A (en) * 1980-10-30 1985-01-01 Canon Kabushiki Kaisha Apparatus and method for tonal image processing
JPS57119564A (en) * 1981-01-19 1982-07-26 Ricoh Co Ltd Half-tone picture processing method
JPS57142072A (en) * 1981-02-27 1982-09-02 Canon Inc Video signal processor
US4495522A (en) * 1981-07-07 1985-01-22 Konishiroku Photo Industry Co., Ltd. Recording apparatus and method of picture image
JPS58114570A (ja) * 1981-12-26 1983-07-07 Canon Inc 画像処理装置
JPS58128078A (ja) * 1982-01-27 1983-07-30 Dainippon Screen Mfg Co Ltd メモリ装置の構成方法
JPS58178664A (ja) * 1982-04-12 1983-10-19 Canon Inc 画像信号処理装置
JPS5977769A (ja) * 1982-10-27 1984-05-04 Canon Inc 像再生装置
JPS5981976A (ja) * 1982-11-01 1984-05-11 Dainippon Screen Mfg Co Ltd 色分解画像走査記録装置
US4531160A (en) * 1983-05-03 1985-07-23 Itek Corporation Display processor system and method
DE3429548A1 (de) * 1983-08-24 1985-05-15 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Farbsteuereinheit fuer ein bilderzeugungsgeraet
US4680625A (en) * 1984-07-18 1987-07-14 Konishiroku Photo Industry Co., Ltd. Method and apparatus for multicolor image forming
US4736254A (en) * 1984-11-22 1988-04-05 Matsushita Electric Industrial Co., Ltd. Method and apparatus for generating pseudo-halftone dots by comparing gray scale values of an original with dither threshold values stored in cells of a matrix array divided into imaginary matrices of elemental areas each containing one cell
JP2621856B2 (ja) * 1986-06-06 1997-06-18 株式会社リコー デジタルカラー画像再生処理方法および装置

Also Published As

Publication number Publication date
DE3885503D1 (de) 1993-12-16
EP0290282A2 (de) 1988-11-09
EP0290282B1 (de) 1993-11-10
US4823189A (en) 1989-04-18
EP0290282A3 (en) 1989-01-11
JPS6464849A (en) 1989-03-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: XEROX CORP. (N.D.GES.D. STAATES NEW YORK), STAMFOR

8328 Change in the person/name/address of the agent

Free format text: BOEHMERT & BOEHMERT, 28209 BREMEN

8339 Ceased/non-payment of the annual fee