DE3885503D1 - Verfahren und Vorrichtung zur Erzeugung eines Zittermusters. - Google Patents

Verfahren und Vorrichtung zur Erzeugung eines Zittermusters.

Info

Publication number: DE3885503D1
Authority: DE; Germany
Prior art keywords: generating; dither pattern; dither; pattern
Prior art date: 1987-05-08
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

DE88304142T

Other languages

English (en)

Other versions

DE3885503T2 (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.)

1987-05-08

Filing date

1988-05-06

Publication date

1993-12-16

1988-05-06 Application filed by Tektronix Inc filed Critical Tektronix Inc

1993-12-16 Publication of DE3885503D1 publication Critical patent/DE3885503D1/de

1994-05-19 Application granted granted Critical

1994-05-19 Publication of DE3885503T2 publication Critical patent/DE3885503T2/de

2008-05-07 Anticipated expiration legal-status Critical

Status 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)
Color Image Communication Systems (AREA)
Facsimile Image Signal Circuits (AREA)
Ink Jet (AREA)
Color, Gradation (AREA)
Controls And Circuits For Display Device (AREA)
Dot-Matrix Printers And Others (AREA)
Image Processing (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 true DE3885503D1 (de)	1993-12-16
DE3885503T2 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

1987
- 1987-05-08 US US07/047,815 patent/US4823189A/en not_active Expired - Lifetime
1988
- 1988-04-25 JP JP63102350A patent/JPS6464849A/ja active Pending
- 1988-05-06 DE DE3885503T patent/DE3885503T2/de not_active Expired - Fee Related
- 1988-05-06 EP EP88304142A patent/EP0290282B1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
JPS6464849A (en)	1989-03-10
US4823189A (en)	1989-04-18
EP0290282B1 (de)	1993-11-10
EP0290282A2 (de)	1988-11-09
EP0290282A3 (en)	1989-01-11
DE3885503T2 (de)	1994-05-19

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Legal Events

Date	Code	Title	Description
1994-12-08	8364	No opposition during term of opposition
2001-08-02	8327	Change in the person/name/address of the patent owner	Owner name: XEROX CORP. (N.D.GES.D. STAATES NEW YORK), STAMFOR
2001-08-02	8328	Change in the person/name/address of the agent	Free format text: BOEHMERT & BOEHMERT, 28209 BREMEN
2005-03-17	8339	Ceased/non-payment of the annual fee