DE3280345D1 - Verfahren zur wertbestimmung an einer halb-tonen schwellenmatrix. - Google Patents

Verfahren zur wertbestimmung an einer halb-tonen schwellenmatrix.

Info

Publication number
DE3280345D1
DE3280345D1 DE8686302295T DE3280345T DE3280345D1 DE 3280345 D1 DE3280345 D1 DE 3280345D1 DE 8686302295 T DE8686302295 T DE 8686302295T DE 3280345 T DE3280345 T DE 3280345T DE 3280345 D1 DE3280345 D1 DE 3280345D1
Authority
DE
Germany
Prior art keywords
determining
value
threshold matrix
tone threshold
tone
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
DE8686302295T
Other languages
English (en)
Inventor
Allen M Roberts
Andrew Sangster
Zolton Stroll
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
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of DE3280345D1 publication Critical patent/DE3280345D1/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
    • H04N1/40—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
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
DE8686302295T 1981-09-08 1982-09-08 Verfahren zur wertbestimmung an einer halb-tonen schwellenmatrix. Expired - Fee Related DE3280345D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/300,349 US4706077A (en) 1981-09-08 1981-09-08 Halftoning implementation for interactive image editing

Publications (1)

Publication Number Publication Date
DE3280345D1 true DE3280345D1 (de) 1991-08-01

Family

ID=23158732

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686302295T Expired - Fee Related DE3280345D1 (de) 1981-09-08 1982-09-08 Verfahren zur wertbestimmung an einer halb-tonen schwellenmatrix.

Country Status (4)

Country Link
US (1) US4706077A (de)
EP (2) EP0074794A3 (de)
JP (1) JPH07120414B2 (de)
DE (1) DE3280345D1 (de)

Families Citing this family (42)

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Publication number Priority date Publication date Assignee Title
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
GB2120896B (en) * 1982-04-06 1987-01-28 Canon Kk Half-tone facsimile system
EP0110353B2 (de) * 1982-11-30 1990-03-21 Kabushiki Kaisha Toshiba Bildsignalverarbeitungssystem geeignet für die Darstellung von Halbtonbildern
DE3444366C3 (de) * 1983-12-09 1994-12-22 Canon Kk Bildverarbeitungseinrichtung
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
US5754727A (en) * 1985-07-04 1998-05-19 Nagasawa; Kenichi Image signal recording system having plural compression encoding modes
US5734785A (en) * 1985-07-04 1998-03-31 Canon Kabushiki Kaisha High efficient image signal recording system
US5198940A (en) * 1985-07-04 1993-03-30 Canon Kabushiki Kaisha Image signal recording system
JPH0827601B2 (ja) * 1986-01-13 1996-03-21 株式会社日立製作所 液晶表示装置、及びその駆動方法
USRE38661E1 (en) * 1986-01-13 2004-11-30 Hitachi, Ltd. Method and apparatus for liquid crystal display with intermediate tone
US5175807A (en) * 1986-12-04 1992-12-29 Quantel Limited Video signal processing with added probabilistic dither
FR2619982B1 (fr) * 1987-08-28 1994-04-29 Thomson Csf Systeme de visualisation d'image couleur sur ecran matriciel
JP2784005B2 (ja) * 1988-03-05 1998-08-06 シャープ株式会社 表示装置の階調表示方式
US5153568A (en) * 1988-07-21 1992-10-06 Proxima Corporation Liquid crystal display panel system and method of using same
US4920501A (en) * 1988-10-19 1990-04-24 Eastman Kodak Company Digital halftoning with minimum visual modulation patterns
US5254982A (en) * 1989-01-13 1993-10-19 International Business Machines Corporation Error propagated image halftoning with time-varying phase shift
JPH0789265B2 (ja) * 1989-03-07 1995-09-27 シャープ株式会社 表示装置の駆動方法
US5185602A (en) * 1989-04-10 1993-02-09 Cirrus Logic, Inc. Method and apparatus for producing perception of high quality grayscale shading on digitally commanded displays
US5254981A (en) * 1989-09-15 1993-10-19 Copytele, Inc. Electrophoretic display employing gray scale capability utilizing area modulation
US5371515A (en) * 1989-09-28 1994-12-06 Sun Microsystems, Inc. Method and apparatus for non-linear dithering of digital images
US5041920A (en) * 1989-11-15 1991-08-20 Xerox Corporation Image halftone generation by static RAM look-up table
JPH03231288A (ja) * 1990-01-30 1991-10-15 Proxima Corp 液晶表示パネル装置及びその使用法
US5214517A (en) * 1990-02-07 1993-05-25 Eastman Kodak Company Digital halftoning with correlated minimum visual modulation patterns
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
DE69226502T2 (de) * 1991-12-11 1999-04-29 Casio Computer Co Ltd Elektronisches Bildaufnahmegerät
US5751265A (en) * 1991-12-24 1998-05-12 Cirrus Logic, Inc. Apparatus and method for producing shaded images on display screens
WO1993013513A1 (en) * 1991-12-24 1993-07-08 Cirrus Logic, Inc. Process for producing shaded images on display screens
US5714974A (en) * 1992-02-14 1998-02-03 Industrial Technology Research Laboratories Dithering method and circuit using dithering matrix rotation
US5389948A (en) * 1992-02-14 1995-02-14 Industrial Technology Research Institute Dithering circuit and method
US5418618A (en) * 1992-03-09 1995-05-23 Mita Industrial Co., Ltd. Tone processing method for forming a halftone image
US5489991A (en) * 1992-10-09 1996-02-06 International Business Machines Corporation Method for generating digital halftone images
WO1996004748A1 (en) * 1994-07-29 1996-02-15 The Harlequin Group Limited Image display using evenly distributed intensity clusters
US5579457A (en) * 1994-07-29 1996-11-26 The Harlequin Group Ltd. Image display apparatus and method using irregularly placed curving structures
US6147671A (en) * 1994-09-13 2000-11-14 Intel Corporation Temporally dissolved dithering
US6034663A (en) * 1997-03-10 2000-03-07 Chips & Technologies, Llc Method for providing grey scale images to the visible limit on liquid crystal displays
US6211859B1 (en) 1997-03-10 2001-04-03 Chips & Technologies, Llc Method for reducing pulsing on liquid crystal displays
US6208430B1 (en) * 1998-01-07 2001-03-27 Xerox Corporation Increased functionality for Holladay halftoning
GB9915365D0 (en) 1999-07-02 1999-09-01 Software 2000 Ltd Stochastic screens for printing
US6624816B1 (en) 1999-09-10 2003-09-23 Intel Corporation Method and apparatus for scalable image processing
US6633687B1 (en) 1999-09-10 2003-10-14 Intel Corporation Method and apparatus for image contrast modulation
JP6531471B2 (ja) * 2014-07-29 2019-06-19 株式会社リコー 画像形成装置、ディザパターン生成装置およびディザパターン生成方法
WO2020221684A1 (en) * 2019-04-30 2020-11-05 Agfa Nv Digital halftoning with spiral dots

Family Cites Families (8)

* 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
US3953668A (en) * 1975-05-27 1976-04-27 Bell Telephone Laboratories, Incorporated Method and arrangement for eliminating flicker in interlaced ordered dither images
US4193096A (en) * 1977-04-04 1980-03-11 Xerox Corporation Half tone encoder/decoder
JPS54144141A (en) * 1978-05-01 1979-11-10 Ricoh Co Ltd Display method for intermediate tone
JPS5563173A (en) * 1978-11-06 1980-05-13 Ricoh Co Ltd Picture signal processing system
US4214277A (en) * 1979-02-02 1980-07-22 Xerox Corporation Halftone implementation apparatus
JPS55108080A (en) * 1979-02-14 1980-08-19 Hitachi Ltd Photo electric conversion unit
JPS5646364A (en) * 1979-09-10 1981-04-27 Xerox Corp Digital convertion in white and black image

Also Published As

Publication number Publication date
US4706077A (en) 1987-11-10
EP0199469B1 (de) 1991-06-26
EP0199469A3 (en) 1987-01-28
EP0074794A3 (de) 1986-08-13
JPH07120414B2 (ja) 1995-12-20
EP0199469A2 (de) 1986-10-29
JPS5932037A (ja) 1984-02-21
EP0074794A2 (de) 1983-03-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee